Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Mr. Royce's requested design alteration for the Goshawk I and II dynamo and brush holders, including sketches. | ||
| View original record | X4333 To Da. from E. c. to CJ. c. to Wor. c. to Hs. c. to WPC. E2/G12.1.21. X.3945. X.3533. RE "GOSHAWK I" and II DYNAMO AND BRUSH HOLDERS. Referring to the above, would you kindly note that Mr. Royce… | ||
| Scan002 | Request to order dynamo brushes from two different suppliers for experiments with the Goshawk dynamo. | ||
| View original record | To Wd. from EFC. c. Wd/Ms. c. Stores. X 4333 EFCB/T25.1.21. X.3533 - GOSHAWK DYNAMO - BRUSHES. X 4333 Will you kindly order up from the Morganite Co. half a dozen brushes to D.1553 in each of their… | ||
| Scan003 | List of different types and quantities of dynamo brushes. | ||
| View original record | X.4333. 25.2.21. X.3945 - LIST OF DYNAMO BRUSHES. 4 Link C.M.3 Morganite brushes for Bijur dynamo on Packard Car. (X. 2 Link C.M.4. and 1 E6 Morganite brushes for Lucas A.400 dynamos. 4 Link H.M.6… | ||
| Scan004 | Prints for the Goshawk I & II starter motor and dynamo, concerning brush holders and adaptations. | ||
| View original record | X433-3 To R. from Da. c. to Bn. c. to EFC. Da16/CB16.3.21. X.3933 - GOSHAWK I & II - STARTER MOTOR & DYNAMO X.3945. X.3934. We send you herewith a print of "N" Scheme 773 - Brush Holder for Motor,… | ||
| Scan005 | Extract detailing Mr. Royce's specifications for Goshawk I dynamo brushes and carcase dimensions. | ||
| View original record | X4333 Extract from EFC5/T1.6.21. 2333 4069 X.3945. X.3348. X.3533 - REGOSHAWK I DYNAMO. Mr. Royce fixed up two standard sizes of brushes which we should use, the larger being 1" by 1/4" and the… | ||
| Scan006 | Specification and testing of Morganite and Le Carbone brushes for dynamos and motors. | ||
| View original record | X.4333 EFC. from BY. BY3-P30.8.21. X.4333 GO HAWK 11. DYNAMO & MOTOR. X.4383. X.4069 LeC.1428 & 1435. X4384. In E1/G29821 replying to certain queries which I raised in connection with the above LeC's,… | ||
| Scan007 | Parts and manufacturing of a 'Goshawk II' Dynamo Commutator. | ||
| View original record | X. 4933 To. RHG SFT. EFC. Ed. Mr. Brook EXPERIMENTAL BY/WER4/EF30. 8. 21. X. 4333 "GOSHAWK" II DYNAMO. R.H. DESIGN. COMMUTATOR. In connection with the above Unit please receive herewith one blue print… | ||
| Scan008 | Sourcing different grades of brushes for the 'Goshawk II' dynamo and motor after a change in brush holder dimensions. | ||
| View original record | S.S. Dept. (100) T(B) N. 79B. 10-12-20. G. 2047 X4333 To Ey. from EFC. c.c. to Ey/WER. EFCL/T31.8.21. X4333 X4384 X3348 X3945 RE BRUSHES FOR "GOSHAWK II". DYNAMO AND MOTOR. In answer to your… | ||
| Scan009 | The design and ordering of commutator brushes for the 'Goshawk II' S.S. Motor and Dynamo. | ||
| View original record | EFC. X.4383. BY/WER3/EF9.9.21. X.4384. "GOSHAWK II" - R.R. DESIGN OF S.S.MOTOR. X.4383. " " dynamo. Please receive herewith one blueprint of each of the following:- D.50228 - Commutator Brush for… | ||
| Scan010 | Request to order dynamo brushes from the Morgan Crucible Co. and Le Carbone Co. for the Goshawk dynamo. | ||
| View original record | R.R. 233a (100 T) (S.H. 798, 10-12-20) G. 2948 X 43834 To Wd. from EFC. EFC4/T10.9.21. X.4382 3/4 - R.R. GOSHAWK DYNAMO. X 3845 Would you kindly order up from the Morgan Crucible Co. two sets ( 8… | ||
| Scan011 | Recommending 'Le Carbone' brushes over those from 'Morgan Crucible' for dynamos and motors. | ||
| View original record | To E.F.C. from R. Copy to CJ. " " PN. " " WB. " " HS. " " DY. " " Mr. Thacker. X4333 x3945 RE BRUSHES FOR DYNAMOS AND MOTORS. From very definite practical experience at Royce Ltd. it has been proved… | ||
| Scan012 | Requesting the order of superior Le Carbone brushes for the Goshawk dynamo, following a note from Mr. Royce. | ||
| View original record | Wd. from EFC. X4383 EFC6/T7.10.21. X.4383 - BRUSHES FOR R.R. GOSHAWK DYNAMO. X4383 Further to our EFC4/T10.9.21 requesting you to order up brushes for the R.R. Goshawk dynamo from the Morgan Crucible… | ||
| Scan013 | Instruction to experimentally produce a commutator for a 'Goshawk' II dynamo, substituting Mica insulation for the previously used Bakelite. | ||
| View original record | [Stamp: To H.C. (struck through), C.L.O. (struck through), E.O. (struck through), M. Des. (struck through), M. Block. (struck through)] [Handwritten: X4383 25] BY/WER2/EF24. 10. 21. [Stamp:… | ||
| Scan014 | C.A.V. dynamo and starter motor for the 'Goshawk II', with a specific recommendation for LeCarbone brushes. | ||
| View original record | Y8303 To EFC. from R. c. to CJ. c. to Wor. c. to Hy. X.4359V. RE C.A.V. DYNAMO FOR "GOSHAWK II". X.3348. X.2345/333 X.4342V Regarding the C.A.V. dynamo, this seems to be the best one we have received.… | ||
| Scan015 | Production delays of the starter motor and dynamo due to issues with the bakelite commutator. | ||
| View original record | X 4333 Extract from R14/G9.11.21. RE GOSHAWK ELECTRICAL EQUIPMENT. X.4383. X.4384. X.3348. X.3945. I have been surprised at the slowness of the production of the starter motor and dynamo but… | ||
| Scan016 | Design improvements for the Goshawk 11 Dynamo Drive. | ||
| View original record | To EFC.) To Hs.) from R. c. to BY c. to HY c. to Wor. X3522 R3/M16.12.21.. GOSHAWK 11. DYNAMO DRIVE. X.4359 X.4385 3522 In reply to your EFC1/T9.12.21. We endeavoured to make this as near and simple… | ||
| Scan017 | Instructions and parts list for the Commutator Section of the 'Goshawk' 11 R.R. Dynamo. | ||
| View original record | R.R. 189 (500 H) (SD. 296. 15.5.17) M.P. 176549. EXPERIMENTAL X 4333 BY/WER5/EF3. 2. 22. c. to Sft. EFC X. 4333 - "GOSHAWK" 11. R.R. DYNAMO. Further to our memo BY/WER1/EF23. 1. 22 in which we… | ||
| Scan018 | Query to confirm if grade 'Z' Le Carbone brushes are identical to the recommended grade 'O' for the Goshawk dynamo. | ||
| View original record | Wd/Ms. from EFC. X.4333 EFC3/T6.2.22. 4333 X.3945 - LE CARBONE BRUSHES FOR GOSHAWK DYNAMO. Would you kindly confirm that the brushes which we have recently received from The Le Carbone Company, marked… | ||
| Scan019 | Suggested points of improvement for the Goshawk Dynamo. | ||
| View original record | X4383 X.4383 1/2 EFC4/T6.2.22. X.4383 - GOSHAWK DYNAMO - SUGGESTED POINTS OF IMPROVEMENT. (1) The brush terminals on the pigtail ends are, when in position, rather close to the end cover. An… | ||
| Scan020 | Test report on a dynamo, noting advisability of increased tension on brush springs. | ||
| View original record | -2- Contd. Our test of one dynamo has indicated the advisability of slightly more tension on the brush springs. The dynamo shews promise of readily complying with the output curve and specified… | ||
| Scan021 | Letter from supplier Le Carbone clarifying the grading system of supplied brushes. | ||
| View original record | X 3945 4333 COPY OF LETTER RECEIVED FROM:- LE CARBONE, COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2. 8.2.22. Messrs. Rolls-Royce Ltd., Nightingale Road, Derby. Dear Sirs, X.3945. Your ref.… | ||
| Scan022 | Internal request to order Goshawk Dynamo Brushes from the Le Carbone Co. | ||
| View original record | To Wd. from EFC. x 4383 EFC2/T18.2.22. X.4383 - GOSHAWK DYNAMO -BRUSHES. X <4383> Will you kindly order up from the Le Carbone Co. 1 dozen sets (3 dozen brushes) in their Grade "O" quality (marked… | ||
| Scan023 | The quality, supply, and ordering of dynamo brushes for the Goshawk. | ||
| View original record | To RHC. from EFC. EFC1/T18.2.22. X.4383 - GOSHAWK DYNAMO - BRUSHES. The quality of brush Mr. Royce favours for the Goshawk dynamo is Le Carbone Grade O (marked Z). We have had 8 of these brushes which… | ||
| Scan024 | Request to order Goshawk dynamo brushes from The Morgan Crucible Co. | ||
| View original record | V4333 To Wd. from EFC. EFC2/T23.2.22. X.4333 - GOSHAWK DYNAMO BRUSHES. X 3745 Would you kindly order up from The Morgan Crucible Co. 4 sets (one dozen brushes) in their H.M.6 Morganite to print… | ||
| Scan025 | Order confirmation for brushes for the 'Goshawk II' starter motor and dynamo. | ||
| View original record | EFC. X4033 X.3945. By/WER/EFS.8.22. X4069 X3348 [Struck through] X4383 X.3945 - "GOSHAWK II" STARTER MOTOR & DYNAMO. We have ordered the brushes for the above machines for production and in the… | ||
| Scan026 | Letter from The Morgan Crucible Company regarding the despatch of Morganite brushes for trial. | ||
| View original record | X.4333. CODES, A.B.C. 4TH & 5TH EDITION, A.I. LIEBERS & WESTERN UNION (UNIV. & 5 LETTER EDIT.) & BENTLEYS. Inland Telegraphic Address, 'CRUCIBLE, PHONE, LONDON.' (2 words only chargeable) Cable… | ||
| Scan027 | Advice note from The Morgan Crucible Company for copper morganite brushes sent for trial. | ||
| View original record | RL 2128 CODES, A.B.C. 4th & 5th EDITION, A.I. LIEBER's & WESTERN UNION (UNIV. & 5 LETTER EDIT.) & BENTLEYS. INLAND TELEGRAPHIC ADDRESS. "CRUCIBLE, PHONE, LONDON." (2 WORDS ONLY CHARGEABLE) CABLE… | ||
| Scan028 | The trial of different grades of dynamo brushes for the Goshawk. | ||
| View original record | X. 4333. EFC/T30.3.22. X.4333 - GOSHAWK DYNAMO BRUSHES. We have today received from the Morganite Co. seven brushes to D.50301 in their Link C.M. 5 quality. We therefore now have for trial on the… | ||
| Scan029 | The receipt and distribution of dynamo brushes from the Le Carbone Co. | ||
| View original record | R.R. 199 (250T) (SD676 19-7-17) MP 180865 X4383 apr. 20th 1922 X. 4383 - R. R. DYNAMO BRUSHES. 3 dozen brushes from the Le Carbone Co. have been received, 21 were handed to Mr. Leach. 15 were received… | ||
| Scan030 | Dynamo failures, brush issues, and commutator problems on the Goshawk II engine. | ||
| View original record | y4333 Extract from :- EP2/LG25.4.22. Re points raised by Hs & Hy. RE GOSHAWK II. DYNAVO FAILURES. "We found that the dynamo on 6-Goshawk-II was not chargeable and on examination found the commutator… | ||
| Scan031 | Order for Goshawk dynamo brushes from the Le Carbone Company. | ||
| View original record | X 4333 Wd. from EFC. EFC2/T25.4.22. X.4333 - GOSHAWK DYNAMO BRUSHES Would you kindly order up from the Le Carbone Company four sets (1 doz brushes) to print D.50301. As before, the terminal D.50302… | ||
| Scan032 | Investigation into a burst commutator on a Goshawk 11 dynamo, comparing original, modified, and American designs. | ||
| View original record | Hs X.4333 TO-By. from E. c. to CD. c. to MST c. to WDT.✓ c. to HS. RECEIVED APR 28 1922 E4/M27.4.22. X 4333 (crossed out) GOSHAWK 11. COMMUTATOR ON DYNAMO. X 4383 We should be very interested to know… | ||
| Scan033 | Material choices for commutator separators, objecting to bakelite and suggesting alternatives or improvements. | ||
| View original record | (2) In any case of course we object to bakelite separa- tors as Mr. Royce has pointed out that this material might carbonise under the effect of brushes sparking and causing a short. We have heard of… | ||
| Scan034 | Instructions for an experimental moulded Bakelite Commutator with mica insulation for the Goshawk II dynamo. | ||
| View original record | X. 4333 BY/Des/H. 28. 4. 22. EXPERIMENTAL TH[obscured]GE C. [obscured]ft. C. TB C. KFC. G. [obscured] Go[obscured]stock. GOSHAWK II. COMMUTATOR FOR DYNAMO. SECTION 8C90. It has been agreed that we… | ||
| Scan035 | The trial of Condensite material for Goshawk dynamo commutators following the failure of bakelite parts. | ||
| View original record | X4333 EFC1/T29.4.22. To Roy. from EFC. c. to Wd. c. to Py. c. to Wor/Mr. Brock. X.4333 - RE MOULDED COMMUTATORS FOR GOSHAWK. X2494 Two Goshawk dynamo moulded bakelite commutators with mica commutator… | ||
| Scan036 | Extract discussing failures and proposed solutions for electrical components on the Goshawk II engine. | ||
| View original record | X.4333 Extract from RL/M4.5.22. RE GOSHAWK II. (1) DYNAMO BRUSHES. X.4333. The failure of these have vexed me very much as I gave exact instructions which were not followed, and some one must be made… | ||
| Scan037 | Complaint regarding faulty pigtail connections on Goshawk Dynamo Brushes from the Le Carbone Company. | ||
| View original record | To Wd. from EFC. c. Mr.Brock for Mr. Leach. X.4333 EFC1/T2.5.22. X.4333 - GOSHAWK DYNAMO BRUSHES We have a complaint to make with regard to the pigtail connections to the brushes on the three dozen Le… | ||
| Scan038 | Letter from supplier Le Carbone regarding a complaint and the supply of sample brushes. | ||
| View original record | X.4333 CONTRACTORS to the ADMIRALTY, POST OFFICE, WAR OFFICE, &c. LE CARBONE COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2. ENGLAND. A.B.C. CODE 4" & "5" EDITION. TELEPHONE - CLERKENWELL 1826. TELEGRAMS… | ||
| Scan039 | Test report on Morganite brushes used on a Goshawk dynamo. | ||
| View original record | R.R. 300 (120B) (SF 349 24-1-19) MP 200557 X 4333 95304 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: E.T.C Order No.: Customer's No.: F.D. 176. Re: Morganite Brushes on Goshawk Dynamo. We have run a set of… | ||
| Scan040 | Extract from a letter concerning dynamo failures on Goshawk engines, detailing issues with brushes and commutator. | ||
| View original record | [Handwritten]: X.4333 Extract from letter from R (Le Canadel) 8.5.22. X.4333. RE GOSHAWKS X.4086. X.4383. X.4219. Dynamo. Kindly find out how it was that thebrushes I said were to be used on he dynamo… | ||
| Scan041 | Correspondence regarding the supply of 'Mouldensite' moulding material for Goshawk engine commutators. | ||
| View original record | EFC. from Wd. c.to Roy. c.to By. c.to Wor/Mr. BROCK. X. 4333 Wd4/NJ8.5.22. X.4333 - Re Moulded Commutators for "Goshawk". Following receipt of yours EFC1/T29.4.22. I wrote the Condensite Co.… | ||
| Scan042 | Letter discussing the supply of 'Mouldensite Powder', arranging a technical expert's visit, and sending a catalogue. | ||
| View original record | - 2 - Wd4/NJ8.5.22. "have experienced in producing satisfactory commutators, "we suggest arranging for our Technical Expert to come "over to your Works at Derby in order to ascertain your "exact… | ||
| Scan043 | Cover letter regarding moulded commutators for the 'Goshawk' engine, enclosing correspondence with the Mouldensite Co. | ||
| View original record | X.4333 EFC. Roy9/W10. 5. 22 X.4333 - MOULDED COMMUTATORS FOR "GOSHAWK". ------------------------------------ Herewith copy of letter I have written to-day to the Mouldensite Co. I will advise you… | ||
| Scan044 | Letter to The Mouldensite Co. about the supply of moulded commutators. | ||
| View original record | Our Ref: RoyB/W10522 62886 10th. May, 1922 Messrs. The Mouldensite Co., Ordnance Works, SHEFFIELD. Dear Sirs, RE MOULDED COMMUTATORS. -------------------- We thank you for your letter of the 5th.… | ||
| Scan045 | Quality control issues with a delivery of Le Carbone brushes for the Goshawk Dynamo, including faulty pig-tails and fitting problems. | ||
| View original record | To Roy. to Wd. to By. c. By/Ds. X. 4333 EFC1/VMQ1/5/22. X.4333. LE CARBONE BRUSHES FOR GOSHAWK DYNAMO. We have noted contents of Le Carbone's letter of the 5th inst., and have now returned this to Roy… | ||
| Scan046 | Comparison of Morganite and Le Carbone brushes, focusing on dimensions, insulation, and pigtail length. | ||
| View original record | -2- brush holders might be taken up. We have also made micrometer dimensions of Morganite brushes and find these to be equally as good if not a little better than the Le Carbone. With regard to the… | ||
| Scan047 | Follow-up letter from The Morgan Crucible Company regarding the trial of CM5 brushes sent for lighting dynamos. | ||
| View original record | CODES, A.B.C. 4TH & 5TH EDITION, A.I. LIEBER'S & WESTERN UNION (UNIV. & 5 LETTER EDIT.) & BENTLEYS. Inland Telegraphic Address, "CRUCIBLE, PHONE, LONDON." (2 words only chargeable) Cable Address,… | ||
| Scan048 | Letter to The Morgan Crucible Co. Ltd. explaining an inability to answer an enquiry about Morganite Brushes due to works closure. | ||
| View original record | X4333 EFC1/LG. 15th. May. 1922. The Morgan Crucible Co.Ltd., Battersea Works, Church Rd. London S.W.11. Dear Sirs, We thank you for your letter of the 11th.inst. with reference to C.M.5. Morganite… | ||
| Scan049 | Blueprint for a Commutator Brush (Control) with assembly instructions. | ||
| View original record | No | OPERATION | MACHINE | TOOL | TOOL No BOUGHT OUT (WITHOUT TERMINAL) 1. FIT AND SWEAT TERMINAL. .025 CHAMFER AT 45° +.10 .250 +.12 .150 +.12 .747 -.5 .850 -.15 1.750 +.00 1.050 RAD NOTE. FLEX TO BE… | ||
| Scan050 | The despatch of three Commutator pieces to Mr. Royce for examination. | ||
| View original record | X4333 BP. from Hs. c. to Mr. Chatwin Stores. X 4333 We are sending into the Stores for despatch to Mr. Royce W.W. - Three pieces of Commutator. For examination - no charge. hs. | ||
| Scan051 | Improved type of commutator for the Goshawk II dynamo. | ||
| View original record | To Mr. from E. c. to Mr. Wor. c. to Mr. Hy. Hs. c. to Mr. Sme. Y4333 E1/M17.5.22. Y4333 GOSHAWK ll. IMPROVED TYPE COMMUTATOR. We send you herewith drawing No. Lec 1578 shewing an improved form of… | ||
| Scan052 | Recurring failure of a Goshawk dynamo commutator and plans for testing a new design. | ||
| View original record | W. for R from Hs. c. to CJ & EJ. c. to E. c. to Da. c. to Ey. X 4333 Hs2/LG17.5.22. X.4383 GOSHAWK DYNAMO X.4333. We are sending to you today a broken commutator off 7-Goshawk II car. Ey. took this… | ||
| Scan053 | Describing an alternative construction method for the improved commutator of the Goshawk 11 Dynamo. | ||
| View original record | To Dr. from E. C. to C.J. Wor- C. to Hy. Hn. C. to RPC.. Hs RECEIVED MAY 19 1922 X4333 GOSHAWK 11. DYNAMO. X4333 We send herewith drawing No. Lec 1581 showing an al-ternative method of construction… | ||
| Scan054 | New and revised parts for the R.R. Dynamo, concerning bearing brackets, brush holders, and windings. | ||
| View original record | To Mr. Coventry C. to EFC. X4333 BY/DS1/W.23/5/22. [STAMP: HS MAY 22 1922 RECD.] X.4333. "R.R. DYNAMO".- BEARING BRACKETS, BRUSH HOLDERS & CROSS CONN. SEC: 8080. FRAME AND FIELD WINDINGS - SEC: 8100.… | ||
| Scan055 | Request for the remains of a failed Goshawk II commutator to be sent for inspection. | ||
| View original record | To Hs. from E. c. to Hs. X4333 E2/M18.5.22. RECEIVED MAY 20 1922 X4333 GOSHAWK 11. COMMUTATOR. We should be glad if you could send down here the remains of the commutator which flew to bits on the… | ||
| Scan056 | Bursting of commutators on the Goshawk 11 dynamo and proposing material and design changes. | ||
| View original record | To Hs. from R. c. to Sd. c. to By. c. to Hy. c. to FP. c. to FPC. [handwritten] X4333 [handwritten] Seen Hs R2/M19.5.22. X4333 RE GOSHAWK 11. DYNAMO. Referring to the bursting of the commutators, I… | ||
| Scan057 | Follow-up letter discussing dynamo modifications and material issues, recommending a switch from bakelite to a micanite ring for the commutator. | ||
| View original record | (2) the cheaper American scheme (with either of the above ested modifications) which are thoroughly reliable. I think if you adopt this last suggestion, and will fit the dynamo with the Le Carbon… | ||
| Scan058 | The re-control of leads from the brush gear for the Goshawk II Dynamo. | ||
| View original record | X4333 [Stamp: MAY 20 1922] Hs BYG/H. 19. 5. 22. E.P.C. Dept. X 4333 GOSHAWK II, DYNAMO. RE CONTROL OF LEADS FROM BRUSH GEAR. Lec. 1572. The proposal to produce tabs or fingers on the main brush plates… | ||
| Scan059 | Drawing LeC 1582 for the control brush spring on the Goshawk 11 dynamo. | ||
| View original record | To Ba. from E. c. to GJ. c. to Wor. c. to By. c. to Hs c. to EFC. ✓ c. to EP. X4333 Hs MAY 22 1922 RECEIVED E1/M22.5.22. X4333 GOSHAWK 11. DYNAMO. We send you herewith drawing No. LeC 1582 shewing the… | ||
| Scan060 | The drawing for a Goshawk 11 commutator built with micanite insulation. | ||
| View original record | To Da. from E. c. to CJ. c. to War. c. to By. c. to Hs. c. to EPC. c. to EP. RECEIVED Hs MAY 22 1922 X4333 E3/M22.5.22. GOSHAWK 11. COMMUTATOR. We send you herewith drawing No. LeC 1584 shewing the… | ||
| Scan061 | Requesting a design alteration for the Goshawk II electric starter motor commutator. | ||
| View original record | To Da. from E. c. to CJ. c. to Wor. c. to By. c. to Hs. c. to EFC. c. to EP. X4333 E5/M23.5.22. X.4333 GOSHAWK II ELECTRIC MOTOR. XT4069 We send you herewith drawing No. LeC.1585 shewing the… | ||
| Scan062 | Overheating failure of Goshawk II commutators and the need to test new insulating materials. | ||
| View original record | To By. from E. c. to CJ. c. to Wor. c. to EFC. c. to Hs. c. to EP. X4333 E3/M23.5.22. X.4383 COSHAWK II. COMMUTATOR. X.4333. In reply to your By15/H18.5.22, the points raised by you have been noted,… | ||
| Scan063 | Use of powdered mica as a filler for bakelite gum. | ||
| View original record | Contd. -2- E3/M23.5.22. the moulded materials. We seem to remember reading in one of Mr. Olley's letters of powde-red mica being used as a filler for bakelite gum. E. [Watermark: MADE AT CROXLEY 1904] | ||
| Scan064 | Letter from Le Carbone regarding the submission of two lots of sample brushes of different grades. | ||
| View original record | X. 4333. LE CARBONE, COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2. 23.5.22. Messrs. Rolls-Royce Ltd., Nightingale Road, Derby. Dear Sirs, Our ref. 1651/P.2431. In accordance with the request made in… | ||
| Scan065 | Letter from a supplier discussing issues with brushes, including loose connections and insulation materials. | ||
| View original record | X.4333 LE CARBONE, COVENTRY HOUSE, SOUTH PLACE, E.C.2. 23.5.22. Messrs. Rolls-Royce Ltd., Nightingale Road, Derby. Dear Sirs, Your ref. Roy2/W22522. Our ref. 898/P.1696. 1308/P.2676. We are this… | ||
| Scan066 | Letter from Le Carbone regarding two insulation samples (glass bead and cotton sleeve) for order No. 9092. | ||
| View original record | X.4333 LE CARBONE. COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2. 23.5.22. Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. Dear Sirs, Our ref 1676/P.2457. In further reference to your esteemed order… | ||
| Scan067 | Design drawing for a Goshawk I standard type commutator. | ||
| View original record | [ "LEC 1584", "X4337", "BAKELITE", "STL", "PRESSED ON TIGHTLY", "MICANITE", "2° Taper", "4° on DIA.", "BOUND & COATED", "WITH INSULATING", "VARNISH", "HEX", "20 T.P.I. L.H.", "LOCK WITH COPPER BUSH",… | ||
| Scan068 | Solder melting on the dynamo commutator of a Lucas Generator fitted to early Goshawk cars. | ||
| View original record | X 4333 To R. from Hs. c. to CJ. c. to E. c. to De. c. to BY. Hs7/LG24.5.22. X.4383 DYNAMO COMMUTATOR. X. 4333 The Lucas Generator which we have fitted to one of the early Goshawk cars has given… | ||
| Scan069 | Use of mica dust as a filling for Bakelite and its properties compared to shellac. | ||
| View original record | X 4333 BY4-H. 25. 5. 22. -------------------- FILLING FOR BAKELITE. X 4333 With reference to the last paragraph in E3/M. 23. 5. 22. personally I do not remember seeing a memo from OY. stating that… | ||
| Scan070 | Design alteration for the Goshawk 11 dynamo's field connections and brush holder insulation. | ||
| View original record | To Hy. from E. c. to CL. c. to Wor. c. to Hs. c. to Mre. c. to Ep. X 4383 (crossed out) X 4333 GOSHAWK 11, DYNAMO. In reply to your memo. concerning the field connections for Goshawk 11. dynamo and… | ||
| Scan071 | Confirming the agreed width of the control brush for the Goshawk dynamo. | ||
| View original record | X4333 To By. from EFC. c. By/Ds. EFC1/T30:5.22. MADE AT CROXLEY X.4383 - GOSHAWK DYNAMO CONTROL BRUSH. X.4333. Answering your pencil note, please note we agree for the width of the control brush on… | ||
| Scan072 | Samples of Le Carbone brushes for the Goshawk Dynamo, detailing preferences for connection types and insulation. | ||
| View original record | R.A. 155 (500 H) (SD. 296. 15.3.17) M.P. 176549. X 4333 To Roy. from EPC. c. to By. EFC1/T31.5.22. X.4333 - GOSHAWK DYNAMO - LE CARBONE BRUSHES We have received samples of Le Carbone Brushes together… | ||
| Scan073 | Issuing new details and a blueprint for a Dynamo Commutator, section 8090. | ||
| View original record | X4333 EXPERIMENTAL Sos II C. to ID. C. to EFC. X.4333 R.R. DYNAMO COMMUTATOR. SEC: 8090. --------------------------------- In connection with the above unit, we are now issuing the new details… | ||
| Scan074 | Fortunate failure of an experimental Goshawk dynamo brush which prevented the use of an unsafe design. | ||
| View original record | To Hy. from R. X4333 c. to Wor. c. to EFC. c. to Hs. R4/M7.6.22. GOSHAWK - DYNAMO BRUSHES. Referring to Hy14/P8.5.22., EFC. should not send pure experiments to France to disgrace the lot of us, but it… | ||
| Scan075 | Letter from supplier Le Carbone regarding a sample flexible with bead insulation for order No.9092. | ||
| View original record | V4 333 LE CARBONE, COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2. Messrs. Rolls-Royce Ltd., Nightingale Road, Derby. 9th June 1922. Dear Sirs, Your ref. Wa/AN2/K3.6.22. Our ref. 1676/P.2457. Further to… | ||
| Scan076 | Le Carbone brushes and pigtail conductors for the Goshawk Dynamo. | ||
| View original record | X4333 To ROY/Ms. from EFC. EFC2/T12.6.22. c. to Ry. X.4333- LE CARBONE BRUSHES FOR GOSHAWK DYNAMO. Referring to the letter ref.1676/P.2457 just received from Le Carbone, together with sample pigtail… | ||
| Scan077 | Instructions regarding re-moulded commutators for G II dynamos using various powders. | ||
| View original record | RR'238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Wor. Order No: X.4333. Customer's No. Re Moulded Commutators for G II Dynamos I have recently supplied EFC. with… | ||
| Scan078 | Requesting an update on the testing of moulded commutators and approval for quantity manufacturing. | ||
| View original record | To EFC. - from Wor. X 4333 Wor5/M20/6/22. I attach note I have received from Mr. Brock re moulded Commutators. Could you kindly let me know the position. Are we now in a state to go on manufacturing?… | ||
| Scan079 | Letter from Le Carbone regarding a Carbon Brush List and curves. | ||
| View original record | X. 4333 CONTRACTORS to the ADMIRALTY, POST OFFICE, WAR OFFICE, &c. LE CARBONE COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2, ENGLAND. CARBONS -FOR- MICROPHONES, WELDING, SMELTING, ELECTRO-DEPOSITION,… | ||
| Scan080 | Page 2 of a letter regarding a Data Form, enclosing a Carbon Brush List and Set of Curves. | ||
| View original record | Messrs. Rolls-Royce, Ltd. - 2 - to be in receipt of the completed Data Form so that we can place the matter before our Works people and let you have their remarks as desired. We are, Yours faithfully,… | ||
| Scan081 | Bursting tests for moulded Goshawk commutators compared to orthodox mica and steel types. | ||
| View original record | X4333 To Wor. from EFC. c. By. EFC1/T21.6.22. X.4333 - COMMUTATOR FOR GOSHAWK. With reference to your Wor5/M20.6.20, I have the five moulded commutators supplied by Mr. Brock but am at the moment… | ||
| Scan082 | Delivery of a Goshawk car to Mr. Royce, noting a broken dynamo and the loan of a spare battery. | ||
| View original record | X4333 Hs. LE18/H/30.6.22. Goshawk with Open Body for Mr. Royce ------------------------------------- We collected the above car from Hoopers and are arranging to deliver it to Mr. Royce at the Hotel… | ||
| Scan083 | Bursting tests conducted on moulded commutators at high speeds and temperatures. | ||
| View original record | X4333 To R. & E. from EFC. c. to CJ. & PN. c. to By. & EP. c. to Rg. & Ds. c. to Wor. EFC1/T3.7.22. X.4333 - BURSTING TESTS OF MOULDED COMMUTATORS. We have a series of tests in progress on the… | ||
| Scan084 | The temperature testing of commutators made from various materials like Elo, Mouldensite, and Bakelite. | ||
| View original record | Contd. -2- EFC1/T3.7.22. within a few degrees of the average temperature of the carcase metal. The temperature of the commutator under test will probably be some 10 or 20 degrees higher than this… | ||
| Scan085 | Test report on various moulding materials, detailing test conditions, results, and remarks. | ||
| View original record | Contd. -3- EFCl/T3.7.22. Date of test. | Moulding material. | Ref: | Carcase temp. reached previous to speed burst. | Test speed. | Duration of test speed. | Result. | Further remarks.… | ||
| Scan086 | The testing of commutators, comparing different powders and segment shapes. | ||
| View original record | Contd. -2- EFCL/T3.7.22. From the above results it would appear that the asbestos filled Elo is the most satisfactory of the powders though this is not considered to be the case by Mr. Brock, who… | ||
| Scan087 | The testing of gunmetal commutators, including proposed future tests using solder to indicate temperature. | ||
| View original record | Contd. -5- EFCl/T3.7.22. (gunmetal) No. 1 sample sent, is the original shape proposed, which however has never been considered satisfactory by the Production Department. It will be understood that in… | ||
| Scan088 | Delay in completing a generator and ongoing experiments with commutators for the 4-Goshawk-11. | ||
| View original record | R. from Hs. X 4333 X4333 DYNAMO FOR 4-Goshawk-11. Hs2/LG3.7.22. It will be a week or 10 days before we shall have a completed generator with built up mica commutator. Experiments are being made on the… | ||
| Scan089 | Cover letter to Messrs. Le Carbone regarding a completed Data Form. | ||
| View original record | X4833 EFC1/T. 10th Jul., 1922. Messrs. Le Carbone, Coventry House, South Place, London, E.C.2. Dear Sirs, With reference to the call of your Mr. Lawrence at our works and your letter ref. 1676/P.2357… | ||
| Scan090 | Modifications to the armature winding of a Goshawk 11 generator. | ||
| View original record | To R. from Hs. c. to CJ. c. to E. c. to Da. c. to BY. X4383 GOSHAWK 11. GENERATORS. X.4383. X.4333. We despatched to you yesterday per passenger train the R-R Generator fitted with the built-up mica… | ||
| Scan091 | The results of bursting tests for moulded commutators, comparing mouldensite and Elo powder materials. | ||
| View original record | To R. & E. from EFC. c. to CJ. & PN. c. to By. & EP. c. Rg. & Da. c. to Wor. c. to Wor/Mr. Brock. X4333 EFCL/T13.7.22. X.4333 - BURSTING TESTS OF MOULDED COMMUTATORS Further to our EFCL/T3.7.22 we now… | ||
| Scan092 | The completion of tests for moulding a commutator and a proposal for further trials. | ||
| View original record | Contd. EFCl/T13.7.22. The above series of tests would appear now to be complete in that they have indicated just what conditions are required for the moulding of a successful commutator. We now… | ||
| Scan093 | Test report comparing the performance of different moulding materials under speed and temperature stress. | ||
| View original record | EFC1/T13.7.22. Date of test. | Moulding material. | Ref. lettr. | Carcase temp. reached previous to speed burst. | Test speed. | Duration of speed test (Mins) | Result. | Further remarks. 1.7.22. 1.… | ||
| Scan094 | Test report detailing the results of speed and temperature tests on Bakelite and Mouldensite moulding materials. | ||
| View original record | EFC1/T13.7.22. -2- Contd. | Date of test. | Moulding material. | Ref. Lcttr. | Carcase temp. reached previous to speed burst. | Test speed. | Duration of speed test (min) | Result. | Further remarks |… | ||
| Scan095 | Proposal for the design and testing of a Goshawk dynamo and starter motor. | ||
| View original record | To R. from EFC. c. to CJ. c. to E. c. to Ey. X4383 EFC4/T14.7.22. X.4383. GOSHAWK DYNAMO. X.4384. GOSHAWK STARTER MOTOR. We propose to have made up a Goshawk dynamo and a starter motor, each machine… | ||
| Scan096 | Letter from 'Le Carbone' discussing the suitability of their 'Z' and 'EG30' carbon grades and offering a sample for testing. | ||
| View original record | X4333 CONTRACTORS to the ADMIRALTY, POST OFFICE, WAR OFFICE, &c. LE CARBONE COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2, ENGLAND. [Box 1] CARBONS -FOR- MICROPHONES, WELDING, SMELTING, &… | ||
| Scan097 | Viability of using a moulded commutator, focusing on material stability under heat. | ||
| View original record | (EFC. (Wor. To (Ey. from R. (E. (Ds. (PN. X4333 R1/M15.7.22. X.4333 - RE COMMUTATOR. We shall not think of using a commutator built up by the moulded system until it has been clearly proved that there… | ||
| Scan098 | Performance of starter motor commutators with improved dimensions and materials. | ||
| View original record | Contd. -2- R1/M15.7.22. process if we embodied the improved dimensions and materials because we have not known any of these commutators to fail, and we assume that the duty is so short that there is… | ||
| Scan099 | Suitability of different grades of brushes from supplier Le Carbone for the Goshawk Dynamo. | ||
| View original record | VH333 To R. from EFC. c. to CJ. c. to Ey. EFC2/T17.7.22. X.4333 - BRUSHES FOR GOSHAWK DYNAMO. Messrs. Le Carbone requested us to give particulars of the brush duty for which their grade Z (O) brushes… | ||
| Scan100 | Letter to Messrs. Le Carbone regarding the trial of E.G.30 and Z grade brushes. | ||
| View original record | X4333 c ROY/Ms. EFC3/T. 17th July, 1922. Messrs. Le Carbone, Coventry House, South Place, London, E.C.2. Dear Sirs, We thank you for your letter of the 15th inst., ref: PL.137 R/P. Though it appears… | ||
| Scan101 | Clarifying the supplier and commercial position of Mouldensite powder for moulded commutators. | ||
| View original record | X 4333. To ROY. from EFC. EFCl/T18.7.22. X.4333 - MOULDED COMMUTATORS. Please find attached copy of Rl/M15.7.22. With reference to par: 4, I had said in my previous report that Mouldensite was… | ||
| Scan102 | Letter from Le Carbone confirming an accepted offer to supply samples of grade 'EG30' brushes for trial. | ||
| View original record | X.4333 CONTRACTORS to the ADMIRALTY, POST OFFICE, WAR OFFICE, &c. LE CARBONE COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2, ENGLAND. [Left Box] CARBONS -for- MICROPHONES, WELDING, SMELTING,… | ||
| Scan103 | Experiments on moulded commutators using asbestos fibre and a commercial report on Mouldensite powder. | ||
| View original record | X 4333 To R. from EFC. c. to CJ. c. to E. c. to By. c. to Wor. c. to Da. c. to FN. EFC3/T18.7.22. X.4333 - MOULDED COMMUTATORS. We have your note Rl/M15.7.22. Experiments will be made to find out… | ||
| Scan104 | The source of supply and manufacturing details for Mouldensite powder. | ||
| View original record | To R. COPY. ROY1/RJ19.7.22. X.4333 - COMMUTATOR. EFC. has seen me this morning with your note of the 15th inst. and is anxious I should write you direct with details as to source of supply of… | ||
| Scan105 | Competitor, Pinchin Johnson & Co., starting production of a similar powder. | ||
| View original record | Contd. -2- ROY1/FJ19.7.22. I heard yesterday that another firm, Pinchin Johnson & Co. of London, the Paint People, have started a small Works at Birmingham for the production of similar powder. I am… | ||
| Scan106 | Cover memo attaching a letter from Le Carbone Company concerning dynamo brushes. | ||
| View original record | X.4333 To ROY/Ms. from EFC. EFC1/T19.7.22. X.4333 - DYNAMO BRUSHES Herewith please receive copy of a letter from Le Carbone Company in answer to our EFC3/T of the 17th inst. EFC. Letter att. | ||
| Scan107 | The investigation and repair of a faulty dynamo for a No.4 Goshawk engine. | ||
| View original record | To EFC. from R. c. to Wor. By. c. to Mr. Brock. X 4333 R2/M19.7.22. X.4383. RE DYNAMO SENT FOR No.4 GOSHAWK. Owing to the absence of the coloured wire scheme, with the ends of the wire not being… | ||
| Scan108 | Note on the manufacturing process of commutators, specifically the settling of plates and the importance of using sufficient heat and pressure. | ||
| View original record | Contd. -2- R2/M19.7.22. so that the plates shall fly out and settle themselves before the final finish to the commutator is done. Such a test would be useful to find out whether the plates were… | ||
| Scan109 | Desired qualities of dynamo brushes, including resistance, wear, and issues with different makes. | ||
| View original record | X4333 To EFC. from R. R1/M19.7.22. X+4333. I have received your memo. re Le Carbone's references to Goshawk dynamo brushes. I do not know the peculiarities of the 2 grades mentioned but what we are… | ||
| Scan110 | Confirming an agreement to make moulded test pieces from various powders to test for deterioration and shrinkage of commutator materials. | ||
| View original record | to Mr. Brock. from EFC. X. 4333 EFC1/T20.7.22. X. 4333 - RE MOULDING MATERIALS FOR COMMUTATORS X 3513 This will confirm our conversation of a few days ago that you will be making up moulded test… | ||
| Scan111 | Letter to a supplier rejecting sample brushes and requesting a recommendation for a new brush grade based on specific machine particulars. | ||
| View original record | X. 4333. EFC5/T. 20th July, 1922. The Morgan Crucible Co., Battersea Works, Church Road, London, S.W.11. Dear Sirs, Referring to your letter of the 11th May, ref: ZAHC/CP, from your 'Z' Dept., and… | ||
| Scan112 | Letter discussing generator brush arms and requesting recommendations on the brush grade for a new design. | ||
| View original record | Contd. -2- EFC5/T. 2 Main Brush Arms 1 Subsidiary Brush Arm 1 Brush per Arm. N.B. The machine is a four-pole single field winding third brush controlled chassis generator. We would like you to say how… | ||
| Scan113 | Letter from The Morgan Crucible Company Limited discussing the trial results of different grades of brushes. | ||
| View original record | X4533 CODES, A.B.C. 4TH & 5TH EDITION, A.I., LIEBER'S & WESTERN UNION (UNIV. & 5 LETTER EDIT) & BENTLEY'S. Inland Telegraphic Address, "CRUCIBLE, PHONE, LONDON." (2 words only chargeable) Cable… | ||
| Scan114 | Technical data sheet from The Morgan Crucible Company, Ltd. detailing properties of electrical grades EG2 and EG0. | ||
| View original record | XFT To Messrs. Rolls-Royce Ltd. Derby The Morgan Crucible Company, Limited. -2- GRADE. Spec. Res. ohms per in. cube Coefficient of Friction Contact Drop volts Normal Current Density amps. per sq.… | ||
| Scan115 | Proposal for trials and ordering of Morganite brushes for the Goshawk Dynamo. | ||
| View original record | To Bd/Ms. from EFC. c. to Ey. X. 4333 EFC1/T24.7.22. X.4333 - MORGANITE BRUSHES FOR GOSHAWK DYNAMO. It is proposed to make further trials of Morganite brushes of suitable grades in order to be… | ||
| Scan116 | Quality and supply issues of brushes for the Goshawk Dynamo. | ||
| View original record | To R. from EFC. c. to CJ. c. to Ey. c. to Wd. X4333 EF^4/T24.7.22. X.4333 - BRUSHES FOR GOSHAWK DYNAMO. Thank you for your R1/M19.7.22. You are correct in supposing that the Z(O) is the quality… | ||
| Scan117 | Proposal to fit Morganite brushes on an experimental car's dynamo, comparing their insulation to Le Carbone's. | ||
| View original record | Contd. -2- EFC4/T24.7.22. You will see that the EG2 has, according to the respective makers, the same specific resistance as the Z Le Carbone. Subject to your approval we would like to fit a set of… | ||
| Scan118 | Comparison table of material properties for Le Carbone and Morganite grades. | ||
| View original record | EFC4/T24.7.22. Maker. Grade. Specific Resis: in ohms per in. cube. Coefficient of friction. Normal Current density amps. per sq. inch. Contact Drop in volts at normal current density. Le Carbone. | Z… | ||
| Scan119 | Letter from The Morgan Crucible Company regarding trials of Link EG0 and Link EG2 brushes. | ||
| View original record | X. 4333 CODES. ABC 4th, 5th, & 6th, (5 LETTER) Edition. A.I. LIEBER'S & WESTERN UNION (UNIV & 5 LETTER EDIT) & BENTLEYS. THE MORGAN CRUCIBLE COMPANY BATTERSEA LONDON DE MARK Inland Telegraphic… | ||
| Scan120 | Letter from The Morgan Crucible Company Ltd regarding a covering order for trial grades. | ||
| View original record | X.4333 CODES, ABC 4th, 5th & 6th (5 LETTER) EDITION. A.I. LIEBER'S & WESTERN UNION (UNIV. & 5 LETTER EDIT.) & BENTLEYS. [Circular Stamp Text]: THE MORGAN'S CRUCIBLE COMPANY BATTERSEA LONDON DE MARK… | ||
| Scan121 | The delivery of asbestos-filled Mouldensite samples. | ||
| View original record | X.4333 EFC. ROY7/FJS-8-22. Following our various conversations re Mouldensite, particularly Asbestos filled, will you kindly arrange to advise R. that samples of such Asbestos filled mouldings were… | ||
| Scan122 | Properties and potential use of Mouldensite moulding powder with an asbestos filler for dynamo commutators. | ||
| View original record | X4333 To R. from EFC. c. to CJ. c. to Wor. c. to By. c. to Fdy. EFC2/T9.8.22. X.4333 - MOULDING POWDER WITH ASBESTOS FILLER X.2573 We were visited last Friday by two representatives of the Mouldensite… | ||
| Scan123 | Recommending Le Carbon brushes over Morganite brushes for dynamos. | ||
| View original record | X.4333 To EFC. from R. DYNAMO BRUSHES. Great care should be taken before departing from the Le Carbon brushes that I recommended for the dynamos on the car. Royce Ltd experience is that none of the… | ||
| Scan124 | Recommending the investigation and use of Bakelite moulded commutators as a more economical alternative to mica. | ||
| View original record | X4333 To EFC. from R. S X3513. BAKELITE MOULDED COMMUTATORS X.4333. As the method of making commutators by the Bakelite process should be very much more economical than the usual mica system, I… | ||
| Scan125 | Letter from Le Carbone regarding the dispatch of coppered carbon brushes for trial. | ||
| View original record | X. 4333 CONTRACTORS TO THE ADMIRALTY, POST OFFICE, WAR OFFICE, &c. LE CARBONE COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2, ENGLAND. [Left Box] CARBONS —FOR— MICROPHONES, WELDING, SMELTING,… | ||
| Scan126 | Inquiry about the successful manufacture of moulded bakelite commutators in the U.S.A. and the specific grade of bakelite powder used. | ||
| View original record | To CY. from EFC. X4333 EFC2/T14.8.22. X. 3513 - BAKELITE COMMUTATORS. X4333 Would you kindly let me know - (1) Whether moulded bakelite commutators are successfully made in U.S.A. for chassis dynamos,… | ||
| Scan127 | Supply issues with supplier Le Carbone regarding incorrectly sized glass bead insulation for carbon brushes. | ||
| View original record | Roy. from Wd. c. to EFC. X 4333 Wd10/WJ15.8.22. Le Carbone. This firm have made many attempts to supply carbon brushes in accordance with our requirements, but up to now have not succeeded. The last… | ||
| Scan128 | Potential overheating concerns raised by Le Carbone for brushes D.50736 & D.50761 due to a reduced flexible diameter. | ||
| View original record | EFC. from Wd. c. to By. X.4333 Wd3/NJ29.8.22. X 4333 Le Carbone - Brushes D.50736 & D.50761. Arising out of the decision to employ small insulating beads on the flexibles of these two carbon brushes,… | ||
| Scan129 | Confirming the approval of a reduced size flexible for Goshawk Dynamo Brushes. | ||
| View original record | X. 4333. To Wd. From EFC. EFC5/T30.8.22. X.4333 - RE GOSHAWK DYNAMO BRUSHES Answering your note Wd3/NJ29.8.22 re Goshawk brushes to D.50736 and D.50761, we are satisfied that this reduced size of… | ||
| Scan130 | That the brush springs for the Goshawk motor and dynamo are too strong and proposing new tension limits for the manufacturer. | ||
| View original record | X4333 To By. from EFC. c.c. To By/Ds. EPC2/T1.9.22. X.4069. RE BRUSH SPRINGS FOR GOSHAWK MOTOR X.4333. & DYNAMO. Recently we have noticed that the springs fitted to the dynamo and motor are rather too… | ||
| Scan131 | Test results log for various moulding materials under speed and temperature stress. | ||
| View original record | Top of page: n4323 E.7c. COLUMN HEADERS: Date of test. | Moulding material. | Ref: | Carcase temp. reached previous to speed burst. °C | Test speed. r.p.m. | Duration of test speed. | Result. |… | ||
| Scan132 | Test log for commutators, detailing results of baking, insulation, and material tests. | ||
| View original record | The main body of the document is a mirrored image, the text below is the decoded (flipped) version. Overlaid Note (not mirrored): * In this case the commutator was baked for 24 hours at 140° C.… | ||
| Scan133 | Enquiry from a representative of Messrs. Le Carbone Co. regarding a report on Carbon Brushes E.G.30 Grade. | ||
| View original record | EFC. - from ROY/Ms. X.4333 ROY/Ms7/DB13.9.22. A few days ago Mr. F. Lawrence, the representative of Messrs. Le Carbone Co., made a personal call and enquired as to whether you are yet in a position to… | ||
| Scan134 | Testing status of Goshawk dynamo brushes from the Le Carbon Company. | ||
| View original record | X4333 To ROY/Ms. from EFC. EFC2/T18.9.22. X.4333- GOSHAWK DYNAMO BRUSHES Answering your ROY/Ms7/DB13.9.22 with reference to the call of the representative Mr. F. Lawrence, of the Le Carbon Company, we… | ||
| Scan135 | Attached documents from the General Bakelite Co. of America for experimental work on Bakelite Moulded Commutators. | ||
| View original record | X. 4333 BY. [crossed out] c. to EFC c. to Ms. c. to R. X 4333 X 3513 [STAMP: RECEIVED] EP3/H21.9.22. Re: Bakelite Moulded Commutators. I attach letter, printed circular and blue print supplied by the… | ||
| Scan136 | Goshawk dynamo brushes being too slack in their holders. | ||
| View original record | To By. from EFC. c. By/Ds. X.4333 EFC4/T30.10.22. X.4333 - GOSHAWK DYNAMO BRUSHES The Electrical Prod. Dept. report that the dynamo brushes are too slack in their holders. Perhaps you would look into… | ||
| Scan137 | Highlighting the inconsistent width of Le Carbone dynamo brushes and requesting an investigation. | ||
| View original record | To By. from EFC. c. By/Ds. X.4333 EFC1/T1.11.22. X.4333 - DYNAMO BRUSHES Further to our EFC4/T30.10.22, the Elec. Prod. Dept. now report to us that the Le Carbone dynamo brushes themselves vary in… | ||
| Scan138 | Correspondence regarding out-of-spec Dynamo Brushes for the Goshawk 11 engine. | ||
| View original record | X. 4333 To Ws. from BY /Ds. C. EFC. BY/Ds1/ML.13.11.22. X. 4333 RE GOSHAWK 11 - DYNAMO BRUSHES D.50761. D.50736. With reference to the Inspection Departments' report attached herewith, will you kindly… | ||
| Scan139 | Chasing an unfulfilled order for Morganite brushes for the Goshawk dynamo. | ||
| View original record | X.4333. To Wd/Ms. from EFC. EFC3/T1.12.22. X.4333- MORGANITE BRUSHES FOR GOSHAWK DYNAMO. We do not yet appear to have received (at any rate in this Dept.) 1 doz. each of the EG.2 and EGO Morganite… | ||
| Scan140 | Follow-up letter from Le Carbone regarding the test results of carbon brushes. | ||
| View original record | X 4333. CONTRACTORS TO THE ADMIRALTY, POST OFFICE, WAR OFFICE, &c. LE CARBONE COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2, ENGLAND. CARBONS -FOR- MICROPHONES, WELDING, SMELTING, ELECTRO- -DEPOSITION,… | ||
| Scan141 | Extracts from a paper on the properties and performance of carbon brushes. | ||
| View original record | X.4333 Typed 2.12.22. X.4333 - EXTRACTS FROM PAPER ON "CARBON-BRUSHES" - (HUNTER BROWN) (I.E.E.Journal Feb.1919.). Spec. resistance various from .003 to .0003w/cu." Loss due resistance, only 10-15%… | ||
| Scan142 | Technical notes on terminals, rings, and brush materials for electrical components. | ||
| View original record | -2- "Shoetype" terminal recommended. "Pin type" bad. (flexibles). Types (1) Graphite (2) Carbon (various % of graphite)(3) Electro graphitic (carbon converted to artificial graphite in furnace) (4)… | ||
| Scan143 | Summary of findings on commutator and brush performance issues from various contributors. | ||
| View original record | -3- Contd. Joel. S Le Carbone - mica abrasive copper unaffected. Use dissimilar metals in rings and brushes. Whitehorn. Spacing round commutator very important. Narrow brushes preferable, tend to cool… | ||
| Scan144 | Faults, such as brush sparking, with the Brush & Commutator System on the Goshawk Dynamo. | ||
| View original record | X4333 To R. from EFC. c. to CJ. c. to Ey. c. to EP. c. Wor. for Mr. Brock. EFC1/T2.12.22. X.4333 - BRUSH & COMMUTATOR SYSTEM ON R.R. GOSHAWK DYNAMO. Some of the production Goshawk dynamos have not… | ||
| Scan145 | Continued memorandum discussing issues with dynamo control brushes during production testing. | ||
| View original record | Contd. -2- EFC1/T2.12.22. the brushes and brush holders does not remove this. Another point, and one which we feel deserves attention at the moment, is that the control brush of the dynamo is not… | ||
| Scan146 | Letter from Le Carbone regarding sending samples of 'EG30' and 'EG60' grade control brushes. | ||
| View original record | X4333 CONTRACTORS to the ADMIRALTY, POST OFFICE, WAR OFFICE, &c. LE CARBONE COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2, ENGLAND. [Left Box] CARBONS -FOR- MICROPHONES, WELDING, SMELTING, ELECTRO-… | ||
| Scan147 | Letter to Messrs. Le Carbone regarding testing different grades of control brushes for a small dynamo. | ||
| View original record | X 4333. EFC2/T. 22nd. December, 1922. Messrs. Le Carbone, Coventry House, South Place, London, E.C.2. Dear Sirs, Answering yours of the 21st inst. with reference to control brushes for our small… | ||
| Scan148 | Letter from Le Carbone regarding testing samples and a control brush. | ||
| View original record | X.4333 CONTRACTORS to the ADMIRALTY, POST OFFICE, WAR OFFICE, &c. LE CARBONE COVENTRY HOUSE, SOUTH PLACE, LONDON, E.C.2, ENGLAND. LEFT BOX: CARBONS -FOR- MICROPHONES, WELDING, SMELTING, ELECTRO-… | ||
| Scan149 | The progress of improvements to the Goshawk dynamo brushes and holders. | ||
| View original record | To BY. from EFC. c. BY/Ds. X4333 EFC3/T16.1.23. X.4333 - GOSHAWK DYNAMO BRUSHES& BRUSH HOLDERS Further to our EFC4/T30.10.22 and EFC1/T1.11.22 would you kindly say if everything has now been done, so… | ||
| Scan150 | Letter from Le Carbone confirming the dispatch of carbon brush samples. | ||
| View original record | X. 4333. CONTRACTORS to the ADMIRALTY, POST OFFICE, WAR OFFICE, &c. LE CARBONE CARBONS FOR- MICROPHONES, WELDING, SMELTING, ELECTRO- DEPOSITION, RESISTANCES, &c. &c., ELECTRO- GRAPHITIC CARBON.… | ||
| Scan151 | Acknowledgement of receipt of four sample brushes for testing. | ||
| View original record | X 4333 EFCL/T. 19th January, 1923. Messrs. Le Carbone, Coventry House, South Place, LONDON, E.C.2. Dear Sirs, We hereby acknowledge receipt, per registered post, of the four sample brushes each of… | ||
| Scan152 | Letter from insulation specialists H.E. Ashdown (Birmingham) Ltd. offering to supply Mica Commutator Rings. | ||
| View original record | Y4333 COPY H.E. ASHDOWN (BIRMINGHAM) LTD. INSULATION SPECIALISTS. ALDRIDGE ROAD, PERRY BARR, BIRMINGHAM. HEA/MWF. Answd. 28.1.23 Messrs. Rolls-Royce Ltd. Electrical Dept., DERBY. Dear Sirs, We… | ||
| Scan153 | Supply of Goshawk dynamo commutator rings and a strategy for price negotiation. | ||
| View original record | To ROY, from EFC. EFC1/T30.1.23. V4333 X.4333 - GOSHAWK DYNAMO COMMUTATOR & BRUSH SYSTEM Answering your ROY5/MG29.1.23, we are at present so very well satisfied with the mica commutator rings we are… | ||
| Scan154 | Letter responding to a telegram about sticking dynamo brushes on a generator. | ||
| View original record | X4323 Expl: Dept: Messrs. Rolls-Royce Ltd., Derby. England. Feb. 20th. 1923. Mr. T. Maddocks, Villa Mimosa, Le Canadel, Par Le Lavandou, Var - France. Dear Maddocks, I have received your telegram in… | ||
| Scan155 | The removal of coppering from Goshawk 11 dynamo brushes. | ||
| View original record | X4383 To Mr Brook. C. EFC. C. NY/Mtr. BY/Ds3/ML23.2.23. RE GOSHAWK 11 DYNAMO BRUSHES. Will you kindly arrange to have the coppering removed off the above Brushes D.50736 and D.50761. We understand it… | ||
| Scan156 | Issues and proposed solutions for the Goshawk II engine's electrical equipment, including the ignition and dynamo. | ||
| View original record | To EFC. from R. c. to CJ. BJ. Wor. c. to Fg. Hs. EP. c. to Ey. E. Da. Hy. Y4333 R1/M7.3.23. RE 4-GOSHAWK II. (1) X.3485. The electrical equipment has been a disappointment The ignition make and break… | ||
| Scan157 | Failures of ignition contact and dynamo brushes for 4-GII electrical equipment. | ||
| View original record | To R. From EFC. c. to CJ. E. c. to Wor. EP. c. to By. X4333 EFC4/T26.3.23. X.4338 - 4-GII ELECTRICAL EQUIPMENT. Answering your H1/M7.3.23 :- X.3485 (1) Failure of Ignition Contact. We have had one or… | ||
| Scan158 | Dynamo testing, detailing issues with contact sparking and the methodology for varying brush positions. | ||
| View original record | EFC4/T26.3.23. -2- Contd. in partial contact, the contact surfaces sparking badly during the process. If so, this should be overcome by the more exact dimensions now obtained. A case of this sort has… | ||
| Scan159 | Continued discussion on testing for mechanical wear, experimenting with softer brushes, and commutator design. | ||
| View original record | EFC4/T26.3.23. -3- Contd. We will also test, as you request, the result of mechanical wear only, also find our answers to your other queries. We began experimenting with softer brushes, but… | ||
| Scan160 | Supply issues with Carbon Brushes for the 20-HP Chassis and testing an alternative supplier. | ||
| View original record | EFC. from ROY/Ms. X 4333 ROY/Ms7/DB6.4.23. 20-HP. Chassis. As you are aware, we are obtaining supplies of Carbon Brushes from The Carbon Co., whose Works are in France, and we are having considerable… | ||
| Scan161 | Investigations into reducing brush sparking on the Goshawk Dynamo and developing a new vibrator regulator. | ||
| View original record | 14333 To EFC. from R. c. to CJ. BJ. Wor. c. to PN. E. Da. c. to EY. Hs. EP. R1/M6.4.23. RE GOSHAWK DYNAMO. X.4383. X.4333. I am in receipt of yours of 26/3/23 and very pleased to hear of the… | ||
| Scan162 | Order for dynamo brushes for a 20 HP engine, comparing Morganite and Le Carbone types. | ||
| View original record | 1433 To Roy/Ms. from EFC. EFC1/T1C.4.23. X.4333 - DYNAMO BRUSHES FOR 20 H.P. Answering your RCR/Ms7/DEC6.4.23, we had delivered some Morganite brushes in EC2 and ECO grades for test, but unfortunately… | ||
| Scan163 | The mechanical wear of dynamo brushes from a Goshawk dynamo. | ||
| View original record | y4333 EFC. 16th April, 1923. AB.67. X.4383. X.4333. MECHANICAL WEAR OF DYNAMO BRUSHES. A standard Goshawk dynamo (No.288) has been run at 2500 r.p.m. for 150 hours (equivalent to 5000 miles) with no… | ||
| Scan164 | Telegram requesting two sets of Goshawk dynamo brushes. | ||
| View original record | R.R. 144A (100B.) SE 867. 9.7.18 MP 193871 ROLLS-ROYCE, LIMITED. V4333 TELEGRAM RECEIVED BY TELEPHONE. angleterre Time Received: 12 24 Date: 20 9 18 To: Roycar Derby By: MB from: Lealmyenne 20th 9.58… | ||
| Scan165 | Instruction sheet detailing the optimal main brush position for Goshawk dynamos. | ||
| View original record | RR 238 (300 Bks.) (SP 152. 6-11-18.) MP 197880 X. 4333 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFC Order No: AB 69. Customer's No.: 1 Date: 30 April 1923 Goshawk Dynamos Main brush position. The best… | ||
| Scan166 | Alteration to the main brush position on the Goshawk dynamo based on performance tests. | ||
| View original record | X4383 To By. } E. } from EFC. c. Wor/Mr. Brock. c. By/Ds. EFCl/T30.4.23. X.4383 - GOSHAWK DYNAMO.- ALTERATION TO POSITION OF X4383 MAIN BRUSHES. We have made an extensive series of careful tests on… | ||
| Scan167 | Instructions for setting the main brush movement and retard range on an E.A.C. dynamo. | ||
| View original record | -2- variation required for adjusting the output by the control brush. Kindly note that in the case of the E.A.C. dynamo the main brushes should be given in the first instance the same degree of… | ||
| Scan168 | Further tests and comparisons of three different Goshawk dynamo designs. | ||
| View original record | X 4333 To RJA. from EFC. EFC/T30.4.23. RE GOSHAWK DYNAMOS. X.4383. Having now satisfactorily settled the main brush position for all Goshawk dynamos irrespective of variation in the field windings,… | ||
| Scan169 | Status of brush material tests and upcoming tests on various dynamos and vibrator regulators. | ||
| View original record | Contd. -2- EFC/T30.4.23. the matter of brush material tests can, as far as we can see at present, be considered complete, and the dynamo test corner will then be available for various tests on the… | ||
| Scan170 | Instruction regarding an alteration to the position of the main brushes for the Goshawk Dynamo. | ||
| View original record | X.4393 EFC. BY/Ds. BY/C3/H. 2. 5. 23. GOSHAWK DYNAMO. ALTERATION TO POSITION OF MAIN BRUSHES. With reference to your EFC1/T. 30.4.23. we consider that this change should be submitted to R. possibly by… | ||
| Scan171 | Standardisation sheet for the Goshawk dynamo brush position alteration. | ||
| View original record | To By/Ds. from EFC. c. Wor/Mr. Brock. X4333 EFC6/T2.5.23. X.4333 - GOSHAWK DYNAMO BRUSH POSITION. Further to our instructions EFC1/T30.4.23, it is considered desirable for a standardisation sheet for… | ||
| Scan172 | Performance graph showing the results of main-brush position tests on a Goshawk dynamo. | ||
| View original record | AMPERE OUTPUT DYNAMO RPM MAIN-BRUSH POSITION TESTS OF R GOSHAWK DYNAMO WITH 20 S.W.G FIELD Control brush adjusted in each case to give a final temperature, of from 70° to 78°C at maximum load. Final… | ||
| Scan173 | The results of dynamo tests concerning the Goshawk dynamo brush position. | ||
| View original record | To R. & E. from EFC. c. By. & EP. c. CJ. & PN. c. Da. c. Wor/Mr. Brock. X4333 EFC1/T3.5.23. X.4333 - RE GOSHAWK DYNAMO BRUSH POSITION. X4333 We have now completed the series of dynamo tests referred… | ||
| Scan174 | The performance curves and tests of various Goshawk dynamo configurations. | ||
| View original record | Contd. -2- EFC1/T3.5.23. Sheet I gives curves for our experimental standard R.R. Goshawk dynamo. Sheet II " " for standard R.R. Goshawk Dynamo No. 288 quite recently taken from production. Sheet III "… | ||
| Scan175 | 140 turn 20 SWG field winding, comparing its performance curves against the standard winding. | ||
| View original record | Contd. -3- EFC/T3.5.23. As regards the 140 turn 20 SWG. field winding, this also appears to be no net improvement over the standard field winding. the early stages of the curves being definitely… | ||
| Scan176 | Graph showing the results of main-brush position tests on a Goshawk Dynamo, plotting ampere output against dynamo RPM. | ||
| View original record | MAIN-BRUSH POSITION TESTS OF R.R. GOSHAWK DYNAMO WITH 140-TURN 20 S.W.G. FIELD-COILS Shunted in each case to give a final temp. rise of from 21°C to 70°C. at maximum load. Final ambient temperature… | ||
| Scan177 | Graph showing main-brush position tests for a Goshawk dynamo, plotting ampere output against RPM under various conditions. | ||
| View original record | AMPERE OUTPUT DYNAMO R.P.M. IV MAIN-BRUSH POSITION TESTS OF R GOSHAWK DYNAMO WITH THICK CARCASE AND SMALL AIR-GAP Control brush adjusted in each case to give a final temperature of from 77° to 80°C at… | ||
| Scan178 | Graph of Main-Brush Position Tests on a Goshawk Dynamo No. 288, plotting Ampere Output versus Dynamo R.P.M. | ||
| View original record | II AMPERE OUTPUT DYNAMO R.P.M. MAIN-BRUSH POSITION TESTS on STANDARD RR GOSHAWK DYNAMO No 288. Control brush adjusted to cut out, to give a final temperature of from 70°C to 74°C maximum on test.… | ||
| Scan179 | Performance graph of main-brush position tests on a Standard 'R' Goshawk Dynamo. | ||
| View original record | Y-Axis: AMPERE OUTPUT X-Axis: DYNAMO R.P.M. Top Left Table: OPERATING FIGURES Amps | Volts 1 | 13.95 2 | 13.75 3 | 13.50 4 | 13.20 5 | 12.80 6 | 12.40 7 | 11.90 8 | 11.40 9 | 10.80 10 | 10.20 11 |… | ||
| Scan180 | Standardisation proposal for altering the angular position of Goshawk dynamo main brushes. | ||
| View original record | R R 715 (S H) (S H 268, 20-2-20) G 8534 (X4333A) COMPLETED 23:5:23. STANDARDISATION of CHASSIS PARTS. Date 3.5.23. X No.4333A Drawing No. Part List Description of Parts. Altered angular position of… | ||
| Scan181 | Imperfect commutation on a Goshawk dynamo caused by mica not being completely cleared during under-cutting. | ||
| View original record | X4383 To Ry. from EFC. c. By/De. c. Wor/Mr. Brock. EFC1/T15.5.23. X.4383-- RE GOSHAWK DYNAMO. X4331 On the dynamo which we recently had from up-to-date production for the purpose of carrying out… | ||
| Scan182 | Points for consideration and experiment regarding the dynamo and other electrical equipment. | ||
| View original record | X4333 To EFC. from R. c. CJ. BJ. c. WOR. EY. HS. R2/M30.5.23. X.1402. X.4383. X.4333. With reference to the dynamo and other electrical equipment, the following are some points for consideration and… | ||
| Scan183 | Preliminary report on the re-investigation of dynamo regulation, brush sparking, and commutation tests. | ||
| View original record | To R. from EFC. c. CJ. WOR. c. HV. X4333 X1402 As a preliminary answer to your R2/M30.5.23:- (1) We have now made a start on the re-investigation of external dynamo regulation, at present dealing with… | ||
| Scan184 | Recurring dynamo failures in 20-HP cars and the investigation required. | ||
| View original record | X4333 BY. c. to EFC. c. to Hs. c. to Brt. EP2/H7.6.23. re. 20-HP. DYNAMO FAILURES. X4333 X4383 We are now getting 20-HP cars into customers' hands, and regret to report that during the last week, we… | ||
| Scan185 | Seeking clarification on whether a new brush holder design is for the E.A.C. dynamo or the 20 HP brush gear. | ||
| View original record | X.4333 SECRET To E. from EFC. c. to By/Ds. E. A. C. EFCl/T11.6.23. X.9670 - RE NEW TYPE BRUSH HOLDERS X4333 With reference to LeC.1725, though not stated therein, it is assumed from the commutator… | ||
| Scan186 | Secret memo regarding a new design for Goshawk brush holders. | ||
| View original record | X4333 To EFC. from R. E1/M14.6.23. SECRET E. A. C. X.4333 - RE NEW TYPE BRUSH HOLDERS In reply to your memo. EFC1/T11623., please note we are preparing a new design for the Goshawk on the same lines… | ||
| Scan187 | Load and pressure of Goshawk dynamo brush springs and suggesting improvements. | ||
| View original record | X4883 To EFC. from R. R2/M19.6.23. 4883 X.8676 - GOSHAWK DYNAMO BRUSH SPRINGS. With reference to these we find (on 5-G.II) that on measuring the load produced by these springs on the carbons by means… | ||
| Scan188 | Suggesting an experiment to improve 20 HP dynamo commutation and discussing its noisiness and current density. | ||
| View original record | To R. from EFC. c. CJ. Hy. X4383 EFC3/T19.6.23. X.4383 - 20 H.P. DYNAMO - COMMUTATION. It is suggested that commutation might be better if the armature slots were skewed half a pitch only, in place of… | ||
| Scan189 | Continuous running tests of a 20 HP dynamo, focusing on brush and commutator wear. | ||
| View original record | X4333 To R & E. from EFC. c. CJ. & PH. M. Dn. Ry. EP. EFC1/T27.6.23. X.4383 - R.R. 20 H.P. DYNAMO - CONTINUOUS RUNNING BRUSH & COMMUTATOR TESTS. X4333 We have now completed the equivalent of 5000… | ||
| Scan190 | Examination report on brush and commutator wear after a 2500-mile test run. | ||
| View original record | Contd. -2- EFC1/T27.6.23. fair but there was slight sparking. The commutator blackened somewhat, but uniformly, i.e. not more particularly pronounced on some parts of the segments than on others. At… | ||
| Scan191 | Test report on commutator sparking and brush wear under various conditions. | ||
| View original record | -3- Contd. There was a perceptible improvement in the commutation from the point of view of sparking and wear, though the surface of the commutator again attained approximately the same condition, (it… | ||
| Scan192 | Machine testing, detailing brush wear measurements after a 5000-mile equivalent run and outlining future comparative tests. | ||
| View original record | EFC1/T27.6.23. -4- Contd. Positive brush .017" Negative " .018" Control " .0245" Equivalent of 5000 miles at 3500 R.P.M. As previously, the machine was restarted without alteration having been made.… | ||
| Scan193 | Continuous running tests for a 20 HP Dynamo, investigating the effects of reversing polarity on the brush and commutator. | ||
| View original record | X4333 To R & E. from EFC. c. CJ. & PN. c. EY. EP. DA. EFC1/T30.6.23. X.4383 - 20 H.P. DYNAMO - CONTINUOUS RUNNING - BRUSH & COMMUTATOR TESTS. X4333 Further to our EFC1/T27.6.23, we have now completed… | ||
| Scan194 | Test report on the polarity and commutation of Goshawk Dynamos. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 X.4533 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EEC Order No: AB 75 Customer's No.: 1 2 July 1923 Polarity of Goshawk Dynamos. A test on commutation,… | ||
| Scan195 | Instructions detailing observations on intermittent flashing on brushes and commutator polarity. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. Z. 19 for intermittent bright flashing to occur at the trailing edge of the negative brush,… | ||
| Scan196 | Instructions concerning dynamo brush spring pressures for the Goshawk engine. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFE Order No: AB.76. Customer's No.: 1 Date: 3 July 1923 X.4333. Dynamo Brush Spring Pressures. The spring… | ||
| Scan197 | Instructions detailing pressure measurements for brushes on various dynamo models. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. E are .3 lb on each of the main brushes and .4 lb on the control brush. On the dynamo of… | ||
| Scan198 | Comparison of brush pressures on Goshawk, R. Bosch, and Scintilla dynamos. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. 3 19 The pressure per square inch with the specified springs, on the Goshawk dynamos, would… | ||
| Scan199 | Further tests of Z brushes for Dynamo 288. | ||
| View original record | ROLLS-ROYCE LIMITED. INSTRUCTIONS. RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 X. 4333. To: EFC Order No: AB. Y8. Customer's No: 1 X. 4333 Further Tests of Z Brushes. Dynamo 288 has been run for a… | ||
| Scan200 | Comparison table of 20 HP Dynamo Brushes from manufacturers Morganite and Le Carbone. | ||
| View original record | X. 4333. X.4333 - 20 H.P. DYNAMO BRUSHES Quality. Morganite. Le Carbone. Hard graphitic E.G.2. = Z Sp.res. .0012 = nearly EG30 with with alternative of EG60 for control brush. Softer E.G.O. graphitic.… | ||
| Scan201 | Analysis of 20 HP dynamo brush spring pressures and related test results. | ||
| View original record | a. & E. To R. from EFC. c. CJ. c. DA. c. BY. By/Ds. c. Sft. for Mr. Brock. X4333 EFC3/T17.7.23. X.4333 - 20 H.P. DYNAMO BRUSH SPRING PRESSURES. ------------------------------------------ The spring… | ||
| Scan202 | Intermittent and continuous running tests on a rig with different brushes and speeds. | ||
| View original record | -2- EFC3/T17.7.23. while on the high speed, then stopping again, the whole cycle being performed about three times per minute. Commutation and general performance was about the same on either polarity… | ||
| Scan203 | Dynamo, cutout, and distribution box failures and recommended improvements. | ||
| View original record | - 2 - 3. Contd. be adopted generally, and possibly you may consider this being recommended to be done retrospectively. We have already had one or two further similar failures the chief of which have… | ||
| Scan204 | Faults with magneto ignition systems and dynamos, including proposed solutions and inspector feedback. | ||
| View original record | - 3 - 5 contd. action being taken when changing over to the magneto ignition. We have also traced faults of the distributor box due to faulty connections, as we have found the terminals "come" loose,… | ||
| Scan205 | Inspection report on a faulty dynamo, detailing a burnt commutator, melted solder, and worn brushes. | ||
| View original record | - 4 - Inspection of this dynamo reveals the fact that the commutator is in a very bad blackened condition, and one or two segments are particularly badly burnt, rather showing that the conductors have… | ||
| Scan206 | Report investigating the excessive output from 20 HP dynamos after being placed on the chassis. | ||
| View original record | X4333 To EP. from EFC. " BY. " Sft. for Mr. Brock. EFC3/T25.7.23. X.4383 - 20 HP. DYNAMO - COMMUTATION. X4333 With reference to the excessive output of dynamos, in some cases it appears that the… | ||
| Scan207 | Rectifying faults related to brush alignment, bedding, and output in a machine, possibly a dynamo. | ||
| View original record | Contd. -2- EFC3/T25.7.23. These faults of alignment and bedding were rectified by us and then it was found that the maximum output on the production test had returned to 10 amperes, at which… | ||
| Scan208 | Dynamo commutator and brush performance, focusing on blackening and bedding issues. | ||
| View original record | Contd. -3- and brushes properly bedded suffers any appreciable alteration of output in use. It is further our experience that commutation in these circumstances, even with the present brush gear and… | ||
| Scan209 | Continued page discussing the positive brush, commutator heating, and instructions for excessive output. | ||
| View original record | -4- Contd. the positive brush is important in another respect, that as this brush has to carry more current, the more perfect the bedding the less the heating of the commutator, though it will be… | ||
| Scan210 | Specification for the inspection and readjustment of faulty dynamos. | ||
| View original record | 25.7.23. SPECIFICATION OF INSPECTION & READJUSTMENT OF FAULTY DYNAMOS. The faults experienced on dynamos of the nature here to be considered may perhaps be divided into two categories:- (1) Excessive… | ||
| Scan211 | Troubleshooting and summary page for brush gear maintenance and adjustment. | ||
| View original record | -2- Contd. improved by scraping and running on load until the necessary area of contact is secured. (f) CONTROL BRUSH POSITION. If satisfied as regards (a) (b) (d) and (e) and if the output is still… | ||
| Scan212 | The Goshawk dynamo's commutation, focusing on the surface condition of the positive brush at reduced output. | ||
| View original record | To R & E. from EFC. c. CJ. & PN. c. Da. BY. EP. X.4333 - GOSHAWK DYNAMO - COMMUTATION. Herewith please receive a copy of my assistant's report on the running of the Goshawk dynamo with reduced output,… | ||
| Scan213 | Test report on a Goshawk dynamo with reduced output, investigating the effect of current density on dynamo brushes. | ||
| View original record | EFC. AB.79. 18th August, 1923. X.4383- GOSHAWK DYNAMO WITH REDUCED OUTPUT A test to find the effect of current density on the the condition of the dynamo brushes (especially the positive), has been… | ||
| Scan214 | Order for various grades of 20 HP dynamo brushes. | ||
| View original record | X.4333 To We/ME. C. EFC. BY/Del/M.31.8.23. X.4383 - 20 H.P. DYNAMO BRUSHES. Would you kindly order up 2 sets of brushes comprising the following - 8 main brushes D.51101, 4 control brushes D.51102, in… | ||
| Scan215 | Investigation into the failure of 20HP dynamo brush holders. | ||
| View original record | X.4333 EFC. C. Mr Davis. BY7-P11.9.23. X.4333. 20HP. DYNAMO. BRUSH HOLDERS. Referring to the instance you brought before my attention this monring, in which the brush holders on the 20HP type Dynamo… | ||
| Scan216 | Investigation into cracking on brush holders, concluding it is not season cracking and recommending a change in material. | ||
| View original record | BY7-P11.9.23. - 2 - find the same results in cars running on the road that have occurred on the dynamo you have run on bench test, then, in my opinion, it will be definitely necessary to consider… | ||
| Scan217 | The process for undercutting commutator bars on the 20HP chassis dynamo to clear mica. | ||
| View original record | X. 4333 EFC. BY9-P18.9.23. 20HP CHASSIS. DYNAMO. UNDERCUTTING COMMUTATOR BARS TO CLEAR MICA. In discussing this matter with Mr Davis I found that we had carried out tests as to how it could be done,… | ||
| Scan218 | Examination of a 20 HP Dynamo failure, identifying the cause as an incorrectly fitted negative brush. | ||
| View original record | X4333 To EP. from EPC. c. EY. c. Mr. Brock. EFC3/T27.9.23. X.4383 - 20 H.P. DYNAMO FAILURE - 40 G.I. X4333 Examination of this dynamo showed that it had considerably overheated and melted out the… | ||
| Scan219 | Technical note regarding heating and solder melting in commutator connections. | ||
| View original record | Contd. -2- EFC3/T27.9.23. the brush and the commutator, heating cannot occur sufficiently to melt out the solder in the commutator connections. EFC. | ||
| Scan220 | Weakness in the third brush system of control for the 20 HP dynamo. | ||
| View original record | X4333 To R & E from EFC. c. CJ. & FN. c. BY. WOR. EP. DA. c. Mr. Brock. EFC4/T27.9.23. X.4383 - RE 20 H.P. DYNAMOS. X4333 A weakness of the third brush system of control, (in which protection is not… | ||
| Scan221 | Report discussing the probable causes of dynamo overheating related to brush contact and bedding. | ||
| View original record | Contd. -2- EFC4/T27.9.23. Partial contact at the positive and or control (or field) brushes could only reduce the output and would be very much less serious. It seems probable that cases of… | ||
| Scan222 | Proposed tests to investigate dynamo failures, specifically relating to melting solder and faulty brush bedding. | ||
| View original record | EFC. X4333 BY10-P28.9.23. X 4333 DYNAMO TROUBLES. Referring to EFC1/T26923, I am of the opinion that it would have been better before replying to R11/M20923 to have carried out the set of tests I… | ||
| Scan223 | Concluding paragraph of a report urging for the quick implementation of tests to address failures. | ||
| View original record | BY10-F28.9.23. contd. - 2 - In conclusion, I think it is of the utmost importance that the tests I asked for should be carried out quickly, as personally I feel myself in the position of not being… | ||
| Scan224 | Tests concerning variations of brush bedding on 20 HP dynamos and the resulting effects on output and heating. | ||
| View original record | X. 4333 To R. & E. from EFC. c. CJ. & PN. c. WOR. BY. EP. c. DA. OY. Mr. Brocks EFC1/T1.10.23. X.4383 - 20 H.P. DYNAMOS. Further to our EFC1/T26.9.23, EFC4/T27.9.23 and EFC5/T28.9.23, and now… | ||
| Scan225 | The performance of an electrical machine under different brush contact positions and temperatures. | ||
| View original record | Contd. -2- EFCI/T1.10.23. The minimum output corresponding to the most retarded positions of the main brush contact surfaces and the most advanced position of the control brush contact surface, was… | ||
| Scan226 | Analysis of dynamo failures, focusing on variations in brush bedding and design limitations of the 20 HP brush gear. | ||
| View original record | Contd. -3- EFC1/T1.10.23. has not actually been tried as to whether this next worst condition would cause the commutator solder to run. The point brought home by this experiment is the large variation… | ||
| Scan227 | The frictional effects and forces acting on a brush within its holder and on the commutator. | ||
| View original record | Contd. -4- EFCI/T1.10.28. In the majority of cases, the brush in position in its holder and on the commutator can be tilted over so as to cause an entirely different bedding thereon. Though the… | ||
| Scan228 | Inclining a brush surface in its holder to counteract commutator friction by creating an opposing tangential force. | ||
| View original record | Contd. -5- EFC1/T1.10.23. holder the top of the brush will be. It will be agreed that the remedy for this will be, so to incline the surface of the brush at the bottom of the spring slot, that the… | ||
| Scan229 | Continuation of a report on dynamo brush modifications, including slant angle adjustments and causes for overheating. | ||
| View original record | Contd. -6- EFCl/T1.10.23. Some time ago a set of brushes, from experimental car 3 GII, was altered in this manner, the slant angle given being 17° to 18° (an angle which we have confidence in… | ||
| Scan230 | Fuse wire testing for a dynamo circuit, including performance data under cold and hot conditions. | ||
| View original record | Contd. -7- EFCL/T1.10.23. carrying capacity to act as a protection against such over-excitation? Although it is a complication to have a second size of fuse wire (three sizes of fuse) and a second… | ||
| Scan231 | The suitability of fuses for experimental cars, proposing a new glass tube type for customer convenience. | ||
| View original record | Contd. -8- EFC1/T1.10.23. has proved that it is not possible with this fuse in circuit to run the solder from the commutator connections with the dynamo on the chassis. One one or two of the… | ||
| Scan232 | Request for the production of several sets of improved dynamo brush springs, with two blueprints provided. | ||
| View original record | x4333 To RHC. C. EFC. BY/Ds3/M.2.10.23. X.4383 - DYNAMO. X.4333 Herewith 2 blueprints of Improved Dynamo Brush Springs (Main and Control). Will you please put in hand several sets as quickly as… | ||
| Scan233 | The unauthorised use of underweight springs for Dynamo No. 318, leading to production issues. | ||
| View original record | X4333 EFC. c. Mr Brock. BY1-P3.10.23. X 4333 DYNAMO NO. 318. RE SPRING PRESSURES. Referring to EFC2/T11023, I was quite at a loss to understand how it was possible for springs only giving half the… | ||
| Scan234 | List of Goshawk dynamo experiments to be run on an experimental chassis. | ||
| View original record | X. 4333 4.10.23. X.4383 - GOSHAWK DYNAMO EXPERIMENTS TO BE RUN ON EXPERIMENTAL CHASSIS. X.4333. (1) Field fuse. (2) Heavier brush spring pressure. (3) Brushes in other materials than Le Carbone 'Z'.… | ||
| Scan235 | The status of ordered dynamo brushes for E.A.C. and Goshawk dynamos. | ||
| View original record | XG 333 To By/Ds. from EFC. EFC7/T5.10.23. X9670 RE DYNAMO BRUSHES. X 4 333 Of the four groups of brushes ordered for E.A.C. and Goshawk dynamos, the following have the coppering:- E.A.C. (Le Carbone)… | ||
| Scan236 | Handing over a complete Goshawk dynamo armature for specialist work on the commutator. | ||
| View original record | X4333 To RHC. from EFC. EFC3/T8.10.23. X. 4333 - GOSHAWK DYNAMO - BRUSHES & COMMUTATOR. As arranged in conversation with you this morning, we are now handing you the complete armature from the D… | ||
| Scan237 | Error with dynamo brushes supplied with unwanted coppering and asking if they should be returned for correction. | ||
| View original record | X4333 To EFC. BY/Ds2/AL8.10.23. X 4333. RE DYNAMO BRUSHES. Referring to your EFC7/T5.10.23., the E.A.C. Brushes were ordered before the Note - "No coppering required" was added. The 20. H.P. Brush… | ||
| Scan238 | Difficulties of machining a lighting dynamo commutator. | ||
| View original record | X4333 To EY. from WS. c. EFC. c. Mr. Coverley. (struck through) c. Mr. Brock. WS1/P13.10.23. X.4333 RE LIGHTING DYNAMO COMMUTATOR. The stepping down of the mica between the Commutator bars presents… | ||
| Scan239 | Modifications for 20HP dynamo troubles, focusing on brushes and fuse wires. | ||
| View original record | X4333 EP. [Crossed out] c. EFC. c. Mr Davis. c. Mr Mattinson. BY8-P13.10.23. 20HP. DYNAMO TROUBLES. Referring to EP1/H1.10.23, Mr Davis will supply you with blueprints of the modification to the brush… | ||
| Scan240 | Issues with the brush spring contact in the 20 HP Brush & Commutator System, suggesting an increase in the slot width. | ||
| View original record | X4333 To EY. from EFC. c. Mr. Brock. c. EP. c. EY/Ds. EFC2/T15.10.23 X.4333 - 20 H.P. BRUSH & COMMUTATOR SYSTEM. Amplifying the remarks we have previously made with reference to the necessity of the… | ||
| Scan241 | Requesting the results of tests on different makes and types of carbon for dynamo brushes. | ||
| View original record | TO EFC. FROM R. X.4333 R1/M18.10.23. X.4333 - RE. DYNAMO BRUSHES. We are waiting to hear the results of the test of different makes and types or carbon for the dynamo brushes. R. | ||
| Scan242 | Summary of test results for Goshawk dynamo brushes made from various materials. | ||
| View original record | X4333 To R. from EFC. c. CJ. EFC4/T20.10.23. X.4333 - GOSHAWK DYNAMO BRUSHES. IN VARIOUS MATERIALS. Answering your R1/M18.10.23, this series of tests is now being completed and a complete report will… | ||
| Scan243 | Comparative tests of Goshawk dynamo brushes made from various materials. | ||
| View original record | To R & E from EFC. c. CJ. & BJ. c. BY. EP. DA. Mr Brock X4333 EFC6/T22.10.23. X.4333 - GOSHAWK DYNAMO BRUSHES IN VARIOUS MATERIALS. Comparative tests of Goshawk dynamo brushes of various materials… | ||
| Scan244 | Test report on the performance and wear of 'Le Carbone' and 'Morganite' commutator brushes. | ||
| View original record | Contd. -2- EFC6/T22.10.23. was caused to start, run slowly for a short while, accelerate to a high speed, and then stop for a few seconds, repeatedly, the period being such that about three cycles per… | ||
| Scan245 | The performance and wear characteristics of various commutator brushes. | ||
| View original record | Contd. -3- EFC6/T22.10.23. EG2 Morganite Brushes. This set ran more smoothly and the positive brush is polished over the leading three-quarters of its surface. The control brush, which sparked more… | ||
| Scan246 | Test results and wear measurements for various types of motor brushes, including a tabulated summary. | ||
| View original record | 4 -3- Contd. EFC6/T22.10.23. These main brushes were afterwards run with an EG.60 control brush, but during the test, the brush gear broke up, and the brushes were spoiled, (the breakage being traced… | ||
| Scan247 | Report comparing the performance of different brush materials and undercutting methods for commutators. | ||
| View original record | Contd. -5- EFC6/T22.10.23. It will be seen that the best results generally were obtained with our standard Z brushes and the Morganite ECO+++ and EG2++, the running of which is considered to be… | ||
| Scan248 | Test results on Morganite EGO material for Goshawk dynamo brushes as an alternative source of supply. | ||
| View original record | To EY. from EFC. c. Wd. X4333 EFC2/T24.10.23. X.4333 - GOSHAWK DYNAMO BRUSHES. X3945 You will see from our report EFC5/T22.10.23. just issued, that the results of our brush material experiments go to… | ||
| Scan249 | Requesting justification for the standardization of Goshawk timing brushes. | ||
| View original record | X4333 EFC. X.4333 GOSHAWK TIMING BRUSHES. BY15-P26.10.23. As C.J. considers it essential for us to have two sources of supply for all the parts we buy out, we consider that if you feel that you are… | ||
| Scan250 | Confirming the transfer of Goshawk II brush springs for dynamos. | ||
| View original record | To EFC. from RHC. X4333 RHC5/LS.30.10.23. X 4333 RE - GOSHAWK II BRUSH SPRINGS. This is to confirm having passed to you, 2 D.51149 - Spring 1 D.51150 - Spring, for one of your Dynamos. We shall be… | ||
| Scan251 | Instructions regarding modified Goshawk dynamo springs. | ||
| View original record | X. 4333 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFC Order No: AB.91. Customer's No: 1 Date: 5 Nov 1923 Modified Goshawk Dynamo Springs A set of Goshawk dynamo springs was recently received from Mr.… | ||
| Scan252 | Instructions regarding bevelled brushes and control spring pressure. | ||
| View original record | RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No Customer's No. Z 19 than best suits their use with bevelled brushes, but the part in contact with the… | ||
| Scan253 | Request for modification and further testing of a Goshawk brush and commutator system. | ||
| View original record | X4333 To RHC. from EFC. EFC8/T30.10.23 X.4333 - GOSHAWK BRUSH & COMMUTATOR SYSTEM. Herewith we hand you the armature from dynamo No.288, this being the machine in use for continuous runs of brush gear… | ||
| Scan254 | Fault with a Goshawk Dynamo Armature due to an incorrect drop test. | ||
| View original record | X4333 To RHC. from EFC. EFC5/T1.11.23. X.4333 - GOSHAWK DYNAMO ARMATURE. We are handing you herewith the armature taken from 49-GB dynamo. We have found an earth on this armature and an incorrect drop… | ||
| Scan255 | Experimental work in progress on Goshawk dynamos to reduce noise and improve commutation. | ||
| View original record | x4333 To R. & E. From EFC. c. CJ. & PN. c. EY. EP. DA. c. WOR. EFC1/T1.11.23. X.4383 - GOSHAWK DYNAMOS. X.4333. We have a good deal of experimental work on Goshawk dynamos in progress, the experiments… | ||
| Scan256 | The testing of bevelling brushes and undercutting the commutator for experimental Goshawk cars. | ||
| View original record | Contd. -2- EFC1/T1.11.23. As regards the bevelling of the brushes and the new method of undercutting the commutator, we have, as reported in our EFC6/T22.10.23, a comparison in progress of the old… | ||
| Scan257 | Experiments with Lucas E.575 machines, focusing on brush wear, armature design, and dynamo noise reduction. | ||
| View original record | Contd. -3- EFC1/T1.11.23. Lucas E.575 machines, comprising in the one case over 10,000 miles, and the results were particularly satisfactory, the wear being slightly less than our present standard… | ||
| Scan258 | On investigations into dynamo noise, linking it to bearing tightness and the use of cast iron end brackets. | ||
| View original record | Contd. -4- EFC1/T1.11.23. Incidentally this latter alteration appreciably upsets the output curve and more so than would be desirable on production. The only thing we have arrived at on the question… | ||
| Scan259 | Fault with a Goshawk Dynamo Armature caused by copper cuttings. | ||
| View original record | To RHC. from EFC. X4333 EFC5/T1.11.23. X.4333 - GOSHAWK DYNAMO ARMATURE. We are handing you herewith the armature taken from 49-GB dynamo. We have found an earth on this armature and an incorrect drop… | ||
| Scan260 | Instruction detailing new brush spring pressures for the Goshawk dynamo. | ||
| View original record | X.4333 To BY " Sft.for Mr. Brock) from EFC. EFC9/T1.11.23. c. By/Ds. X.4333 - GOSHAWK DYNAMO BRUSH SPRING PRESSURE. Will you kindly note that the brush spring pressures aimed at on the main brushes… | ||
| Scan261 | Expressing disappointment with the slow progress on the Goshawk Dynamo and suggesting improvements. | ||
| View original record | To EFC. from R. X4333 Rg/12.11.23. X.4383. RE GOSHAWK DYNAMO. X.4333. We hope that those which have been turned out can be expected to give reasonable satisfaction for a long period of use. We must… | ||
| Scan262 | Comparative test report on the Goshawk dynamo brush gear. | ||
| View original record | X4333 To R & E. from EFC. EFC2/T13.11.23. c. CJ. & PN. c. BY. EP. DA. X.4333 - GOSHAWK DYNAMO BRUSH GEAR. A comparative test of the running of the Goshawk brush gear in the original condition with… | ||
| Scan263 | Test comparing performance and wear of Z brushes on a Goshawk Dynamo. | ||
| View original record | COPY. EFC. SB.92. 13th Nov. 1923. MODIFIED COMMUTATION OF GOSHAWK DYNAMO. A set of Z brushes has been run for the equivalent of 2500 miles continuously, and for 50 hours intermittently, first in the… | ||
| Scan264 | The examination of Dynamo No. 197, identifying projecting micas as the cause of burnt commutator bars and requesting reconditioning. | ||
| View original record | X. 4333 Mr Brock. c. EP. c. EFC. BY2-P13.11.23. X.4333 DYNAMO NUMBER 197. WILLIAMSON. In dismantling and examining the armature of the above Dynamo, it was noticed that one or two Commutator Bars were… | ||
| Scan265 | Improvements for the Goshawk Dynamos, including changes to brushes, springs, and commutators. | ||
| View original record | R.R. 101A (40 H) (EL 42 12-7-23). J.H., D. X4333 EXPERIMENTAL REPORT. Expl. No. X.4383. REF: EFC5/114.11.23. X4333 To S. C. CJ. C. EY. C. Mr. Brock. THE GOSHAWK DYNAMOS. With reference to your… | ||
| Scan266 | The performance and resistance of various generator carbon brushes. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Contd. -2- Expl. No. 4383 REF: EECS/T14.11.23. { L.F.C.2 as found on a Bosch generator } Soft { .00072 ohms per inch cube. } graphitic.… | ||
| Scan267 | Improvements in dynamo commutation and noise. | ||
| View original record | R.R. 493A (40 H) (BL 42 12-7-23). J.H., D. -3- EXPERIMENTAL REPORT. Contd. Expt. No. 4383. REF: EFCS/T14.11.23. the major improvements as regards commutation, and owing to the fact that EP. has… | ||
| Scan268 | Follow-up query regarding an increase in the width of the brush slot for the Goshawk Brush Gear. | ||
| View original record | X4333 To BY/RD. from EFC. EFC3/T16.11.23. X.4333 - GOSHAWK BRUSH GEAR. We should like to hear from you as to whether anything has been done regarding the increase in the width of the brush slot asked… | ||
| Scan269 | Design query regarding the slot on the 20 HP Dynamo Brush Gear. | ||
| View original record | X. 4333. To EFC. BY/RD/MLJ 17.11.23. X.4333 - 20 H.P. DYNAMO BRUSH GEAR. Replying to your EFC3/T16.11.23, nothing has been done in this matter so far. I would point out however, that all the Brushes… | ||
| Scan270 | Results of a Goshawk dynamo brush gear test with heavier spring pressure. | ||
| View original record | X4383 To R & E. from EFC. c. CJ. & FN. c. HY. EP. DA. EFC1/T21.11.23. X.4383 - GOSHAWK DYNAMO BRUSH GEAR. The Goshawk dynamo brush gear test with the heavier brush spring pressure applied to the new… | ||
| Scan271 | Test report on Goshawk Z brushes with increased spring pressure on dynamo 288. | ||
| View original record | EFC. AB.93. 20th Nov. 1923. X.4383 - GOSHAWK Z BRUSHES WITH INCREASED SPRING PRESSURE. A set of Z brushes on dynamo 288 have been given the usual test of continuous running for the equivalent of 2500… | ||
| Scan272 | Notification regarding the receipt of Goshawk dynamo brushes. | ||
| View original record | X4333 EFC/T29.11.23. X.4333 - GOSHAWK DYNAMO BRUSHES. We have to-day received the following (six sets) of brushes in Morganite HM.3 grade material, comprising:- 1 doz. main brushes to D.51101 1/2 doz.… | ||
| Scan273 | Goshawk dynamo brush tests, comparing the wear of different Morganite brush materials. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. XG353 EXPERIMENTAL REPORT. Expl. No. 4333 REF: EFC3/T10.12.23. To R & E. from EFC. c. CJ. & PN. c. Ey. DA. EP. GOSHAWK DYNAMO BRUSH TESTS. Further to (1) Our… | ||
| Scan274 | Test result summary comparing EGO and EG2 brushes against the standard Z brushes. | ||
| View original record | Contd. -2- EFE3/T10.12.23. It will be seen from the results, that the EGO and EG2 brushes may be considered to be very nearly equally as good as the present standard Z brushes, and that either of… | ||
| Scan275 | Repeat tests of EGO and EG2 Morganite brushes on a Goshawk dynamo. | ||
| View original record | EFC. AB.96. 7th Dec. 1923. X.4333 - REPEAT TESTS OF EGO AND EG2 MORGANITE BRUSHES ON GOSHAWK DYNAMO. A set each of the above has been run again on the direct coupled rig, for the usual equivalent of… | ||
| Scan276 | Use of high conductivity copper for the Goshawk commutator and brush system. | ||
| View original record | X. 4333 To EY. from EFC. _c._ EY/RD. EFC8/T9.1.24. X.4333 - GOSHAWK COMMUTATOR & BRUSH SYSTEM. I have been given to understand that when Mr. Ormerod was with us, he insisted that commutators should be… | ||
| Scan277 | Goshawk dynamo brushes, confirming EG.2 Morganite brushes as a satisfactory alternative to standard Z Le Carbone brushes. | ||
| View original record | X4333 To BY. from EFC. c. BY/RD. EFC9/T9.1.24. X.4333 - GOSHAWK DYNAMO BRUSHES. X4283 We now have further evidence, on examination of a set of these brushes running on a dynamo on chassis 7GII, that… | ||
| Scan278 | Inspection report on a Dynamo R3 after a total mileage of 3923 miles. | ||
| View original record | 1804 Extract from AB.97. 7.1.24. Dynamo R3 on 7GII. Fitted 4.10.23 with EC2 bevelled brushes. run 1457 miles and returned to make positive brush bevelling more effective. Run a further 2466 miles… | ||
| Scan279 | Material and brush wear of a 20 HP Dynamo Commutator. | ||
| View original record | X4333 To EFC. BY/RDS/ML11.1.24. X.4333 - 20 H.P. DYNAMO COMMUTATOR. Referring to your - EFC8/T9.1.24, I have looked up the Part list and detail of the Commutator Bar produced in Mr Ormerod's time and… | ||
| Scan280 | Wear and material properties for a 20 HP Dynamo Brush and Commutator. | ||
| View original record | X4383 To BY/RD. from EFC. EFCI/T14.1.24. X.4333 - 20 HP. DYNAMO BRUSH & COMMUTATOR. Reference By/RD8/ML11.1.24 The actual electrical conductivity of the copper is an unimportant point, as quite 95% of… | ||
| Scan281 | The Goshawk Commutator & Brush System, specifically regarding the use of hard-drawn copper and the process of annealing. | ||
| View original record | X. 4333. EFC. c. SET/M Brock. BY15-P17.1.34. X.4333 GOSHAWK COMMUTATOR & BRUSH SYSTEM. Referring to EFC8/T9124, there is no justification for the idea put forward in your memo quoted. Copper for… | ||
| Scan282 | Request to build a standard Dynamo Commutator with annealed copper bars for testing. | ||
| View original record | X.4333 To R.M.C. (struck through) C. EFC. BY/RD3/ML.23.1.24. X.4383 - DYNAMO COMMUTATOR. Will you please have built up a standard Commutator to D.50780 with annealed Copper bars and fit same to an… | ||
| Scan283 | Confirming a Goshawk Dynamo with annealed Comm Bars has been passed for testing. | ||
| View original record | X.4333 To EFC. from RHC. RHC17/LS12.2.24. X.4383 - DYNAMO. This is to confirm having passed to you for Test, Dynamo which has annealed Comm Bars. Goshawk Dynamo M. RHC. | ||
| Scan284 | Blueprint of dynamo brush setting diagrams for Goshawk and E.A.C. models. | ||
| View original record | X 4333 DYNAMO BRUSH SETTING DIAGRAMS PRODUCTION 58° GENL TEST 62° N 9° RETARD + 16.4° 12.4° 122° OR 118° S 16.4° F 10.9° N GOSHAWK (POSITIVE ROTATION) VIEWS FROM COMMUTATOR END. IN THESE DIAGRAMS THE… | ||
| Scan285 | Confirming the replacement of a dynamo for a 10,000-mile test and discussing modifications for new brush gear. | ||
| View original record | X4323 To HHC. from EFC. c. Hs/TMW. EFC1/T4.3.24. X.4383 - 20 HP. DYNAMO. This is to confirm that as arranged in conversation, the dynamo from the new 6GII engine unit be replaced by the experimental E… | ||
| Scan286 | Letter from supplier 'Le Carbone' explaining a delivery delay for an order due to a strike at their works. | ||
| View original record | X-4333 Copy of Letter. From: LE CARBONE. Coventry House, South Place, LONDON E.C. 2 4th March 1924. Messrs. Rolls-Royce Ltd., Derby. Dear Sirs:- Your Order 23955. Our Ref 8575/P9035 Reverting to yours… | ||
| Scan287 | Letter from ROY to EFC regarding supply difficulties for carbon brushes from the supplier Le Carbone. | ||
| View original record | X. 4333. EFC. from ROY. ROY1/MGS.3.24 X. 4333 Carbon Brushes - Le Carbone As you are aware, we are experiencing certain difficulties in obtaining reasonable supplies from these people, in addition to… | ||
| Scan288 | Goshawk dynamo brushes, recommending EG.2 Morganite brushes as an alternative in case of supply failure. | ||
| View original record | X.4333 To EY. from EFC. c. EY/RD. EFC1/T6.3.24. X.4333 GOSHAWK DYNAMO BRUSHES. With reference to the attached note from ROY, you will remember we have already reported in our EFC9/T9.1.24 that we… | ||
| Scan289 | Goshawk dynamo commutation, comparing standard and Morganite brushes on various chassis. | ||
| View original record | X4333 To R. from EFC. c. CJ. & PN. c. E. & Da. c. EY. EP. EFCl/T7.3.24. X.4333 - GOSHAWK DYNAMO COMMUTATION. Further to our various previous experimental reports on Goshawk dynamo commutation, the… | ||
| Scan290 | The examination and mileage testing of various dynamos and their brushes. | ||
| View original record | Contd. -2- EFC1/T7.3.24. The brushes on dynamos A and D were of the same standard Z material. The brushes on dynamos R3 and 470 were EG2 and EGO Morganite material respectively. After certain periods… | ||
| Scan291 | Analysis of dynamo and brush material performance on different types of commutators. | ||
| View original record | Contd.. -3- EFC1/T7.3.24. Analysis of the detailed results of the various reports will show that the best all round result has certainly been obtained on dynamo D, the conditions of which are… | ||
| Scan292 | Bad commutation issues related to armature slots and upcoming reports on armatures and dynamo brush gear. | ||
| View original record | EFC1/T7.3.24. (4) Contd. were undercut, there was usually considerable evidence of mica not having been properly removed from the sides of the slots, and our own experience goes to show that this was… | ||
| Scan293 | Inspection report on the condition of four chassis dynamos after road testing. | ||
| View original record | EFC. AB.97. COPY 7th Jan. 24. CHASSIS DYNAMOS UNDER OBSERVATION. The four dynamos below have been inspected at the beginning of the new year for general condition after running various distances on… | ||
| Scan294 | Inspection report for Dynamo 470 from chassis 6GII with Ego Morganite brushes, detailing wear and test results. | ||
| View original record | EFC. AB.99 21.1.24. X.4383 - DYNAMO 470 FROM 6GII WITH EGO MORGANITE BRUSHES+ This machine has now been removed from the chassis and replaced by machine E (two coils per slot). On inspection the… | ||
| Scan295 | Inspection report on a Goshawk Dynamo R3 from 7GII after running 5419 miles. | ||
| View original record | EFC. AB.102. 7th Feb .1924. X.4383 - GOSHAWK DYNAMO R3 FROM 7GII. This machine, having run 5419 miles on the above chassis has been removed for inspection and replaced by dynamo F. The brushes are of… | ||
| Scan296 | The condition of a Dynamo D from chassis 4GII after running 5513 miles. | ||
| View original record | EFC. AC.2. 4th March, 1924. X.4383 - DYNAMO D FROM 4GII. (STANDARD). This machine has run 5513 miles on the chassis and has now been replaced by dynamo 470. The insulation as tested on 200 volts A.C.… | ||
| Scan297 | Use of Morganite versus LeCarbone dynamo brushes for the 20HP model. | ||
| View original record | X. 4333 Roy. c. EFC. BY17-P21.3.24. X.4333. 20HP DYNAMO BRUSHES. The question of using Morganite brushes has been discussed with R. over and over again. At one time when he received merely an… | ||
| Scan298 | Issuing a standardisation sheet for 20 HP Dynamo Brushes. | ||
| View original record | X 433? To ROY. from EFC. c. BY. EFC2/T24.3.24. X.4333 - 20 HP. DYNAMO BRUSHES - EG2 MORGANITE. Reference your By17/P21.3.24. We are issuing a standardisation sheet covering the use of the above… | ||
| Scan299 | Promising results of bench tests on an annealed copper commutator for a 20 HP dynamo and planning for further experimental use. | ||
| View original record | X4333 To EY. from EFC. c. BY/RD. c. RHC. EFC3/T25.3.24. X.4333 - ANNEALED COPPER COMMUTATOR FOR 20 HP DYNAMO. As will be seen from the attached report AC.9 of the 19th inst., the bench tests of the… | ||
| Scan300 | Instruction sheet detailing test results for a 20 hp Dynamo M with an annealed copper commutator. | ||
| View original record | RR 238 (150 BKS.) (BH57.29-6-20.) MP 224356 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Order No.: AC.9. Customer's No.: 1 19 March 1924 20 hp Dynamo M, with Annealed Copper Commutator. This machine, set… | ||
| Scan301 | Sending a 20 HP Dynamo M with an annealed copper commutator for installation. | ||
| View original record | X.4333 To RHC. from EFC. c. Hs/TMW. EFC4/T27.3.24. X.4333 - 20 HP. DYNAMO M WITH ANNEALED COPPER COMMUTATOR. We are sending you this dynamo herewith. Will you now kindly have this placed on 7GII in… | ||
| Scan302 | Proposal to test a 20 HP dynamo commutator made from 57 segments of annealed copper, including relevant blueprint references. | ||
| View original record | X.4333. BY/RD5/ML.31.3.24. X.4610. X.4333. DYNAMO COMMUTATOR - 20 HP. It is proposed to test out a dynamo having its commutator made of annealed copper and having 57 segments, so we therefore send you… | ||
| Scan303 | Difficulties obtaining 20 HP Dynamo Brushes from LeCarbone and requesting a Standardisation Sheet. | ||
| View original record | X.4333 EFC. from ROY. c. to EY. [text crossed out] ROY/7/MG4.4.24 20 HP. Dynamo Brushes Reverting to EY17/P21.3.24 re above, we are still in difficulty in obtaining delivery from the LeCarbone people.… | ||
| Scan304 | Standardisation of Morganite EG.2 quality brushes for 20 HP dynamos as a secondary supply option. | ||
| View original record | RR 755 (10M) (SL391 2-11-23) MP 281297 XL.333 COMPLETED 23.4.24. STANDARDISATION of CHASSIS PARTS. Date 25.3.24. Description of Parts. MORGANITE EG.2 QUALITY BRUSHES FOR 20 HP. DYNAMOS (in case only… | ||
| Scan305 | The standardisation sheet for Morganite brushes for a 20 HP Dynamo. | ||
| View original record | X 4333 To ROY. from EFC. c. BY. EFC2/T5.4.24. X.4333 - MORGANITE BRUSHES FOR 20 HP. DYNAMO. Answering your ROY7/MG4.4.24, a standard-isation sheet for this item is at present in circulation for… | ||
| Scan306 | Sourcing LeCarbone brushes for 20HP dynamos and the importance of maintaining stock and a consistent supplier. | ||
| View original record | X. 4333 BY8-F7.4.24. 20HP DYNAMO BRUSHES. The right way to get over the difficulty in obtaining delivery of a LeCarbone brush is to order at least one series ahead, so that we always have a stock of… | ||
| Scan307 | Issues with oversized and rigid flexible brush pigtails on E.A.C. dynamos and proposing modifications. | ||
| View original record | X 4333 S E C R E T To BY/RD. from EFC. EFC1/T10.4.24. X.9670 - E.A.C. DYNAMO BRUSHES. X 4333 X4637 The flexible brush pig-tails on the E.A.C. dynamo brushes are too heavy. They are unnecessarily heavy… | ||
| Scan308 | Road test report for EG2 grade 20hp dynamo brushes. | ||
| View original record | X.4333 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Order No. AC.12. Customer's No. X 25/April/1924. Road-tests of EG2. 20hp. Dynamo Brushes Grade EG2 brushes were fitted to dynamo R3 on 7GI last October,… | ||
| Scan309 | Request to re-solder the commutator connections for a Goshawk dynamo armature. | ||
| View original record | X 4333 RHC. from EFC. EFC4/T1. 5. 24. X.4333 - GOSHAWK DYNAMO. COMMUTATOR Herewith armature from dynamo No.69 ex chassis 40 G.2. Will you kindly have the commutator connections re-soldered. EFC. | ||
| Scan310 | The testing and repair procedure for a 20 HP Dynamo Armature. | ||
| View original record | To RHC. from EFC. to HY. to WOR. X4333 EFC1/T2.5.24. X.4383 - 20 HP. DYNAMO ARMATURE EX CHASSIS 48-G-4. X4333 Herewith the above armature. Will you kindly in this case (and in future similar cases)… | ||
| Scan311 | Investigation and repair procedure for customer-returned dynamos with overheating faults. | ||
| View original record | ntd. -2- We may also here remark that we have not yet had a returned dynamo for investigation which has had the commutator undercut, even by the present method. We think we may be able to demonstrate… | ||
| Scan312 | Internal order request for Goshawk dynamo brushes specifying quantities and material grades. | ||
| View original record | X4333 To Wd. from EFC. EFC1/T28.5.24. X.4333 - GOSHAWK DYNAMO BRUSHES. Will you kindly order up :- 1 doz. 20 HP. dynamo main brushes D.50761. ½ doz. 20 " " control brushes. D.50736. in each of the two… | ||
| Scan313 | Distorted and unfit commutator on a 20 HP Chassis Dynamo R3. | ||
| View original record | X. 4333. To RHC. from EFC. EFC1/T30.5.24. X.4333 - 20 HP. CHASSIS DYNAMO R3. Herewith we return to you the above dynamo which you have just fitted with an annealed copper commutator with the standard… | ||
| Scan314 | Technical notes and specifications for the Goshawk dynamo, including details on armatures, current-density, brush-gear and brush spans. | ||
| View original record | X 4-383 5.6.24. GOSHAWK DYNAMO NOTES. X4383 X4633 ----- Expl. Std. and thick carcase armatures. Resis. std. .347 ohm "Th.C" .365 ohm. Diff. .018 ohm Ratio 1.05. Armature active length, standard 2.8"… | ||
| Scan315 | Potential use of sheet Bakelite instead of powder form for manufacturing commutators. | ||
| View original record | X4332 EFC. BY19/H. 13. 6. 24. X4333 COMMUTATORS. X3573 Although not interested actually in changing from the present construction for our Commutators, it is interesting to note that I obtained from… | ||
| Scan316 | The standardisation of Morganite EG.2 quality brushes as a backup for the 20 HP dynamo. | ||
| View original record | X4333 By from Wd. c.to EFC. c.to MG. RECEIVED 19 JUN 1924 Wd4/NJ18.6.24. 20 H.P.Chassis. Morganite EG.2 Quality Brushes for 20 HP.Dynamo. On 23.4.24 a completed standardisation sheet covering… | ||
| Scan317 | Testing Morganite EG.2 brushes for a 20 HP Dynamo, detailing test progress and ordering more parts. | ||
| View original record | To Wd. from EFC. c. to Ry. X4383 EFC3/T19.6.24. X.4333 - MORGANITE EG.2. BRUSHES FOR 20 HP. DYNAMO. Answering your Wd4/NJ18.6.24 brushes of this quality are at present undergoing tests on experimental… | ||
| Scan318 | Requesting bursting tests to be carried out on a moulded commutator. | ||
| View original record | X 4333 To RHC. from EFC. EFC2/T19.6.24. X.4383- BURSTING TESTS ON MOULDED COMMUTATOR. Kindly have commutator herewith fitted to spindle of rig herewith for commutator bursting tests. EFC. Finished RHC | ||
| Scan319 | Instruction memo regarding the transfer and issuance of main commutator brushes for an experimental order. | ||
| View original record | x.4333 My/Chat. c. to EFC. Wd/AW2/W20.6.24. Will you please transfer to experimental order 4333, in accordance with EFC3/T19.6.24. 8 Main Commutator Brushes D.51295. We received 780 of these on the… | ||
| Scan320 | Instructions and test results for a No. R3 Dynamo (9II) with an annealed copper commutator, intended for a 20HP chassis. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.B. Order No. W.A.48 Customer's No. X 4333 No. R3 Dynamo (9II) with annealed copper commutator. This dynamo is now ready for placing on a 20HP chassis. New Z grade… | ||
| Scan321 | Test and inspection report showing performance data and handwritten notes on the condition of a commutator and brush. | ||
| View original record | RR 238 (100 BKS) (SHS) 29-8-20.) MP 22435E ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. W.A.48(2) Customer's No. 19 Speed Volts Amperes 640 13.6 1.6 750 13.9 4.4 900 14.3 7.7 1200 14.75 11.2 1500 14.85… | ||
| Scan322 | The condition of E.G.2 brushes from a Goshawk R.3 dynamo after testing. | ||
| View original record | RR 238 (150 BKS.) (BH57. 29-6-20.) MP 224358 X4333 PB102 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.B. Order No.: W.A. 49 Customer's No.: X 4333 E.G.2 Brushes off Goshawk Dynamo R.3. These brushes have… | ||
| Scan323 | Instructions regarding a dynamo with an annealed copper commutator. | ||
| View original record | RR 238 (100 BKS.) (BH57. 29-2-20.) MP 22435 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. W. A 49 (2) Customer's No. The above dynamo(R3) on which these brushes have been running, has an annealed… | ||
| Scan324 | Production test results for a Goshawk Dynamo R3 with an annealed copper commutator. | ||
| View original record | X 4333. EEC. WA.50. 21.6.24. X.4383. PRODUCTION TEST OF GOSHAWK DYNAMO R3. WITH ANNEALED COPPER COMMUTATOR, AFTER BEING SET TO GENERAL SPECIFICATION. Open circuit volts (cold) at 600 r.p.m. 15.1.… | ||
| Scan325 | Fitting a tested dynamo with an annealed copper commutator to an experimental car. | ||
| View original record | To RHC. from EFC. TMW. X.4383 - DYNAMO WITH ANNEALED COPPER COMMUTATOR. Herewith we hand to you dynamo R.3 which you recently fitted with a 29 segment annealed copper commutator. We have completed… | ||
| Scan326 | Test results for the engine-hot output of a NORB Goshawk dynamo with an annealed copper commutator, showing speed vs amperage. | ||
| View original record | RR 238 (100 BKS) (SH37.28-6-20.) MP 224358 X. 4333 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.b. Date 26 June 1924 Order No. W.A. 51 Customer's No. X.4383 Engine-hot output of NORB Goshawk dynamo with… | ||
| Scan327 | Confirming the reservation of Main and Control brushes for an experimental order. | ||
| View original record | X.4333 EFC. Wd/AW15/W30.6.24. Replying to yours EFC2/T19.6.24 we have to inform you that we have now reserved 8 Main Brushes D.51295 and 4 Control Brushes D.51294 to experimental order No.X4333.… | ||
| Scan328 | Requesting the undercutting of a Goshawk dynamo commutator from chassis Ø-GI. | ||
| View original record | X. 4333 To RHC. from EFC. EFC4/T4.7.24. X.4333 - GOSHAWK DYNAMO COMMUTATOR. Herewith please receive the armature from Goshawk dynamo X from chassis Ø-GI. Would you kindly have the commutator undercut… | ||
| Scan329 | The bursting test of a moulded commutator, comparing results to previous tests. | ||
| View original record | To BY. from EFC. c. Wer/Mr. Brock. Y4333 EFC5/T4.7.24. X.4333 - BURSTING TEST OF MOULDED COMMUTATOR. X3513 Reference your BY19/H13.6.24 (copy attached) we have carried out the tests therein requested… | ||
| Scan330 | Instructions for a moulded commutator bursting test. | ||
| View original record | RR 238(180 BKS) AHSB?.20-6-20.[?] MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. X 4333. To E.F.B Date: 4 - 7 - 1924 Order No. W.A. 57 Customer's No. X 3573 X 4333. Moulded Commutator Bursting Test This… | ||
| Scan331 | Test report on a commutator under cold and hot conditions. | ||
| View original record | RR 238(150-pks) (SH57.29-6-29.) WP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. W.A.57 (2) Customer's No. Cold condition The commutator was speeded up to a speed of 6300 rpm and maintained… | ||
| Scan332 | Commutator failure test, identifying temperature as the main cause of the moulding's disintegration. | ||
| View original record | RR 238 (1M) (BH97. 28-6-20.) MP 224398 ROLLS-ROYCE, LTD. INSTRUCTIONS. 19 To Order No. Customer's No. After the commutator had been running for 1/2 min at 6,300 rpm. four segments flew out. From the… | ||
| Scan333 | Returning the spindle from a burst moulded commutator test and requesting the parts. | ||
| View original record | X.4333. To RHC. from EFC. EFCS/T7.7.24. X.4333 - MOULDED COMMUTATOR TEST. Herewith we return to you the spindle of the burst moulded commutator. Would you kindly have this commutator removed and the… | ||
| Scan334 | Chipping of dynamo and motor brushes and proposing solutions to improve bedding. | ||
| View original record | SFT/Mr. Brock. c. Mr. Davies. c. EFC. X.4333 BY12/H8.7.24. X.4333. X.967C. X.4637. DYNAMO & MOTOR. RE BRUSHES. We have recently had an opportunity of discussing the brush question with Mr. Lawrence of… | ||
| Scan335 | Advantages and methods for polishing brushes for commutators. | ||
| View original record | Contd. -2- EY12/H8.7.24. One other matter which I noticed was that they make a point of polishing some of their brushes. This again I pointed out would be a distinct advantage as it would… | ||
| Scan336 | Modifications to dynamo brushes, specifically the radius and chamfer, to prevent chipping. | ||
| View original record | To BY. from EPC. c. BY/RD. c. Wor/Mr. Brock. X4333 EFC3/T14.7.24. (Handwritten) X4637 X.9670 X 4333 RE BRUSHES. Reference your BY12/H8.7.24. we agree that it would be a definite advantage for the… | ||
| Scan337 | Experiments on brushes, specifically bedding for different radii, involving the Le Carbone Company. | ||
| View original record | Contd. -2- EFC3/T14.7.24. the brushes being properly fixed up in the holders on the end plate complete, this course having been suggested by us some time ago. If you will have a number of brushes… | ||
| Scan338 | The standard brushes received for a 20 HP Dynamo. | ||
| View original record | X. 4333 17.7.24. 20 HP. DYNAMO - STANDARD BRUSHES. X.4333. The following standard brushes from Le Carbone have been received to EFCl/T28.5.24, to D.50761 (Main), and D.50736 (Control). 12 Main brushes… | ||
| Scan339 | Modified brushes for a 20 HP Dynamo. | ||
| View original record | V4333 C. EFC. 4333 X.9670 - BRUSHES - 20 H.P. DYNAMO. BY/RD7/AL.12.8.24. Please receive herewith 1 print of:- D.51325 - Commutator Brush. D.51326 - " " (Control). These are standard brushes D.50761… | ||
| Scan340 | The return of a moulded commutator after bursting tests. | ||
| View original record | X4333 To SFT. for Mr. Brock. c. BY. EFC7/T13.8.24. X.4333. MOULDED COMMUTATORS - BURSTING TESTS. Herewith we return for your inspection the commutator which we have tested. the results of which were… | ||
| Scan341 | Proposal to try out polished dynamo brushes for a 20 HP chassis to reduce sliding resistance. | ||
| View original record | X. 4333. EFC. BY9/H. 13. 8. 24. X. 4333. 20 HP. CHASSIS. DYNAMOS. With reference to the proposal I recently made to try out some dynamo brushes for the above dynamo from the point of view of reducing… | ||
| Scan342 | Tests with reversed polarity on a Goshawk dynamo D. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.b. Order No. W.A. 75 Customer's No. X4333 Tests with reversed polarity on Goshawk dynamo D This test was for the purpose of observing whether running the above… | ||
| Scan343 | Instructions and observations on the condition of dynamo brushes and commutator after testing. | ||
| View original record | RR 238 (150 BKS) (SHST.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To ________ 19__ Order No. W.A75 (2) Customer's No. ________ Main positive brush (which in this case would be the main… | ||
| Scan344 | Observations from a test on commutator and brush conditions under reversed and normal polarity. | ||
| View original record | RR 239.(150 BKS) [SH57.29-e-20.] MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. To ______ 19__ Order No. WA75(3) Customer's No. ______ continuously for the purpose of obtaining a comparison of the… | ||
| Scan345 | The decision to halt the polishing of dynamo brushes pending an experimental report. | ||
| View original record | X4333 To Wd. C. EFC. RE DYNAMO BRUSHES. Referring to your Wd9/U27.8.24 (copy herewith for EFC), we are of the opinion that the polishing of the Brushes for production should not take place until after… | ||
| Scan346 | Price increase and manufacturing tolerance changes for polished dynamo brushes from supplier Messrs. Le Carbone. | ||
| View original record | COPY. X4333 BY. from Wd. Wd9/U27.8.24. Dynamo Brushes. I confirm my Wd17/NJ30.7.24; this morning we are in receipt of a further letter from Messrs. Le Carbone on the question of the polishing of the… | ||
| Scan347 | The testing of polished versus unpolished Goshawk Dynamo Brushes, finding no advantage in their use. | ||
| View original record | X4333 To EY/RD. from EFC. c. Wd. By EFC3/T10.9.24. X.4333. GOSHAWK DYNAMO BRUSHES. Referring to your EY/RD9/ML2.9.24 and Wd9/U27.8.24 regarding the proposal for polished brushes, we have carried… | ||
| Scan348 | Bench rig test of polished Z brushes on Dynamo B, detailing performance and wear. | ||
| View original record | EFC. AC.23. X.4333. 10th Sept. 1924. X.4333. X.4610. POLISHED Z BRUSHES ON DYNAMO B WITH TWO COILS PER SLOT (ALTERNATE POLARITY). These brushes have run three periods on the bench rig with reversed,… | ||
| Scan349 | 20 HP dynamo commutation when running with opposite electrical polarity, concluding the experiments are discontinued. | ||
| View original record | R.R. 403A (40 H) (SL 42 12-7-23). J.H., D. X4333 EXPERIMENTAL REPORT. Expl. No. X.4333. REF: EFC1/T15.9.24. To R. & E. from EFC. c. CJ. & PN. c. EY. EP. DA. X.4333. 20 HP. DYNAMO COMMUTATION WHEN… | ||
| Scan350 | Test report on LFC2 main and LFC3AB8 control brushes for a 20 HP dynamo. | ||
| View original record | RR 236 (150 BKS.) (SH57.29-6-20.) MP 224358 X4333 File ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFE. Order No: AC 28 Customer's No: XX.4610, 4333. Date: 8. Oct. 1924. LFC2 Main and LFC3AB8. Control Brushes… | ||
| Scan351 | Test report on various grades of Goshawk Dynamo twin type brushes. | ||
| View original record | EFC. 4333 6.11.24. GOSHAWK DYNAMO- TWIN TYPE BRUSHES. The following brushes to EFCL/T12.9.24 to D.51330 (Control) and D.51331 (Main) have been received for test. Grade and No. Particulars. Remarks. Z… | ||
| Scan352 | Extract of a communication regarding the battery and dynamo for chassis No. 3G2. | ||
| View original record | X4333 Extract from EWT/HS12/T15.12.24. Re Chassis No.3G2. X.4600. 2. The battery (P & R 3b) to which you refer is still on the car and is OQK. X.4333. 3. The R3 dynamo is fitted to the engine we sent… | ||
| Scan353 | Internal request for a mileage update and inspection report on Morganite dynamo brushes on chassis 4-GII. | ||
| View original record | X4383 To E. from EFC. EFC3/T4.2.25. RE 4-GII MILEAGE. I should be glad if you would let me know the mileage to date on 4-GII. We have on this chassis EG2 Morganite brushes on dynamo 470, and these… | ||
| Scan354 | Diagrams for dynamo brush settings for 57 coil armatures. | ||
| View original record | R DYNAMO BRUSH SETTING DIAGRAMS 57 COIL ARMATURES TOP DIAGRAM: TERMINALS + F+ - N S 7° 60° 16.4° 120° 63° 10.9° F 16.4° N ENGINE SIDE LEFT SIDE: 20 HP POSITIVE ROTATION VIEWS FROM COMMUTATOR END RIGHT… | ||
| Scan355 | Instruction sheet detailing the results of a further test on a set of dynamo brushes. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFE Order No. AC40 Customer's No. X.4333 Date: 9th Feb. 1925. X.4333 Further test of 8c/s 20hp Z Brushes This test has now been completed on dynamo B and tests… | ||
| Scan356 | The performance and wear of Z brushes and an annealed commutator after a bench run. | ||
| View original record | RR 230 (100 BKS.) (SH57. 28-8-20.) MP 224358 X4333 ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.F.C. Order No.: A.E. 42. Customer's No.: X. 4-333. 18-Feb. 1925. Z Brushes with Annealed Commrs. A set of Z… | ||
| Scan357 | 20 HP Dynamo E failure due to a sticking brush, subsequent repair, and condition. | ||
| View original record | RR 238(150 BKS.)(SH57.29-6-20.) MP 224388 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC. Order No: AC. 52. Customer's No: X H.G. 4333 20 h.p. Dynamo E. Annealed Copper Commutator This machine, fitted with 2… | ||
| Scan358 | Instructions sheet detailing observations on brush wear and lubrication issues. | ||
| View original record | RR 238 (100 BKS.) (SH57. 29-8-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To____________________ 19__ Order No._________________ Customer's No. 2. lubrication, and the positive brush has begun to… | ||
| Scan359 | Schedule of brush and commutator tests on 20 HP dynamos. | ||
| View original record | X4333 EFC/T26.2.25. SCHEDULE OF BRUSH & COMMUTATOR TESTS ON 20 HP. DYNAMOS. (1) 29 Segment annealed copper commutator. This is being run (a) On M dynamo now to come off 7-GII. (b) On R3 dynamo on… | ||
| Scan360 | Specifications for dynamo and starter motor brushes for a 20 HP Chassis. | ||
| View original record | So Le Carbone Co. -2- X4383 Contd. Extract from 2405/T X4383 x 2945 3-3-25 20 HP. CHASSIS. Dynamo. Two main brushes at 90° (4-pole machine) of Z Le Carbone. Contact area of each brush .750" x .300" =… | ||
| Scan361 | From EFC to AJS thanking them for a report on the dynamo on vehicle 4-GII. | ||
| View original record | X.4333 To AJS. from EFC. EFC2/T9.3.25. RE DYNAMO ON 4-GII. Thank you very much for your complete report on the condition of the commutator and brushes on the dynamo on 4-GII. EFC. | ||
| Scan362 | The condition and wear of the dynamo brushes for car 4.G.11, including a diagram. | ||
| View original record | TO EFC. FROM AJS. Copy to E re. DYNAMO ON 4.G.11. Replying to your EFC3/T4225., the following are the particulars you require:- The mileage of the car as registered to date is 818.8 miles. The… | ||
| Scan363 | Condition of the dynamo and commutator brushes for 20 HP Chassis No. 3.G.2. | ||
| View original record | EFC. X4333 EWT/HS5/T30.3.25. re 20.HP.Chassis No.3.G.2. Electrical Equipment. Further to the last paragraph of our memo EWT/HS3/T25.3.25, we are this morning in receipt of a note from JLE. Reading as… | ||
| Scan364 | Instruction sheet detailing a report on 20hp Dynamos M and R3. | ||
| View original record | HH 23B (100 BKS) (SH57.29-6-20.) MP 224368 X6333 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC. Order No. AC.5T. Customer's No. X 4883 . X4626. 30 April 1925. 20hp Dynamos M and R3. M. This machine has run… | ||
| Scan365 | Instruction about a drop in main brush spring pressure and a report on component R.B.3. | ||
| View original record | RR 238 (150 BKS.) (BH57-20-8-20.) MP 224388 ROLLS-ROYCE LTD. INSTRUCTIONS. To ________ Order No.________ Customer's No. 2 19__ The main brush spring pressures have fallen from about 4.2 lbs to 1.0 lb… | ||
| Scan366 | Experiments comparing annealed copper commutators with standard hard-drawn copper commutators for dynamos. | ||
| View original record | To R & E. from EFC. c. CJ. & PN. c. EY. RG. WGR. X4323 EFC3/T20.5.25. DYNAMO - ANNEALED COPPER COMMUTATOR. We have completed a series of experiments on commutators made of annealed copper in place of… | ||
| Scan367 | Instruction sheet detailing the condition of a 20hp Dynamo 288 removed from chassis 59II. | ||
| View original record | X. 4333 29 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFE Date: 3 July 1925 Order No.: AC.54. Customer's No.: X.4333. 20hp Dynamo 288. This machine has now been removed from chassis 59II and returned to us by… | ||
| Scan368 | The condition of bushes, noting dust accumulation and un-soldered wires. | ||
| View original record | RR 23A (150 BKS.) (SHEET-29-6-20.) MP 224388 ROLLS-ROYCE LTD. INSTRUCTIONS. 29 To Order No. Customer's No. 2. Bushes are free in the holders and a great amount of dust is present, probably on account… | ||
| Scan369 | Instruction sheet on the condition of a 20hp Dynamo 470 after completing 17,270 miles. | ||
| View original record | RR 235 (100 BKS.) (RH87.29-6-20.) MP 22435E ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC. Order No. AC. 57. Customer's No. X Date: 1. Sept. 1925 20hp Dynamo 470 from GF.68. This machine has now completed… | ||
| Scan370 | Extract detailing an intermittent dynamo failure, noting issues with the cutout and excessive sparking. | ||
| View original record | X5670 Extract from GWH.1/Crn.23.8.25. Chassis 9-GIII. Dynamo. X.5670. x9962 We are having trouble with the dynamo failing temporarily. I tried it last night, and although the control brush seemed… | ||
| Scan371 | Letter discussing a dynamo fault on chassis 9-GIII and suggesting a remedy involving cleaning the brushes and commutator. | ||
| View original record | X5670 Expl. Dept., Messrs. Rolls-Royce Ltd., Derby. 25th August, 1925. EFC3/T. Hotel de France, Chateauroux, Indre, France. To GWH. from EFC. Dynamo on 9-GIII. X9962 From your description of the… | ||
| Scan372 | 10,000-mile test of a 20 HP vehicle, focusing on electrical equipment issues. | ||
| View original record | X5870 Extract from CWE12/LH22.9.25. (REPORT ON 10,000 MILE TEST of 20 HP) X.5840. X.5870. ELECTRICAL EQUIPMENT. (a) DYNAMO. X.5660/70. This failed completely at 8750 miles, and no current could be… | ||
| Scan373 | The performance test of EG.2 brushes on a 20 HP dynamo. | ||
| View original record | RR 238 (150 BKS) [BH57.29-6-20.] MP 22435E 57 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC 22 Sept 1924 Order No.: AC. 25. Customer's No.: X 4610 X4333 EG.2 Brushes on 20 h.p. Dynamo (2 coils/slot) These… | ||
| Scan374 | Instructions and report for a repeat test on EG2 dynamo brushes, detailing wear and performance. | ||
| View original record | RR 238 (150 BKS.) (RH57. 29-6-20.) MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. 57 To: EFC Order No. AC. 32. Customer's No. X.4333. 4610 20. Nov, 1924 Repeat Test of EG2 Brushes. A repeat test of these… | ||
| Scan375 | Inspection report on a Dynamo D fitted with EG2 brushes after 7830 miles of use. | ||
| View original record | RR 238 (100 BKS.) [BH57.29-6-20.] MP 224388 57 ROLLS-ROYCE LTD. INSTRUCTIONS. To: C.F.C. Date: 20 May 1925 Order No. AC. 53. Customer's No. R.4333 Dynamo D on 7 GII with EG2 Brushes. This machine was… | ||
| Scan376 | The condition of Dynamo D and E6Z brushes after a 10,000-mile test run on a car. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC. Order No.: AC. 59. Customer's No.: X 4610. 57 Dynamos D on 7.G.I. E6Z brushes. This machine has now completed 10,000 miles running on the car. The main brushes… | ||
| Scan377 | Inspection report for a returned Dynamo D after being replaced on a chassis. | ||
| View original record | RR 22F (100 BKS) [SH37.29-6-20.] MP 224356 57 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFE Order No.: AC 61. Customer's No.: X 4610, 4333. Dynamo D from 7GT (E.G. 2. Brushes) This machine has now been… | ||
| Scan378 | Instructions detailing wear measurements after 10,000 miles and observations on armature end-play. | ||
| View original record | RR 2381(50 BKS.) (BH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. 57 To________________ 19__ Order No.___________ Customer's No. 2 wear is as follows (covering over 10,000 miles running.) :-… | ||
| Scan379 | Incorrect brush clearance on Goshawk Commutator & Brush Systems. | ||
| View original record | To BY/RD. from EFC. c. EY. X4333 EFC4/T28.9.25. X.4333. GOSHAWK COMM. & BRUSH SYSTEM. WE have recently pointed out to you the importance of correct brush in holder clearance, to prevent brushes… | ||
| Scan380 | Specifying the minimum and maximum brush clearances for 20 HP and EAC components. | ||
| View original record | X 4333 28.9.25. D.O. BRUSH CLEARANCES. X.4610, X.8660. _____________________ 20 HP. EAC. ____ ____ Min. .005" .002" Max. .015" .009" Brush box a pressing. Brush holder a casting (slot machined). | ||
| Scan381 | Test on the effects of over voltage on a 20 HP dynamo. | ||
| View original record | X4333 EFC. AC.62. 23rd Oct. 1925. X.4610. X.4333 EFFECTS OF OVER VOLTAGE ON 20 HP. DYNAMO. In order to observe the possible effects on brush bedding and consequent output on 20 HP. dynamos when run at… | ||
| Scan382 | Brush and commutator tests conducted on 20 HP dynamos. | ||
| View original record | X. 4333 EFC/T26.10.25. BRUSH & COMMUTATOR TESTS ON 20 HP DYNAMOS. (6) 57 Segment Commutator with Le Carbone X Main and EG.3399 Control Brushes. (a) Two tests of this have been completed, see AC.26 of… | ||
| Scan383 | Test report on Morganite EG2 dynamo brushes as a second source of supply. | ||
| View original record | To R. from RFC. S. C. Da. CJ. BJ. FN. Wor. EP. Ex. RS. Wd. V4383 EFC2/T29.10.25. X.4333 - MORGANITE EG2 BRUSHES FOR 20 H.P. DYNAMO. (In case of failure of supply of present standard Z Le Carbone… | ||
| Scan384 | Page regarding the standardization of brushes for second string purposes. | ||
| View original record | Contd. -2- EFCR/T29.10.25. Will By therefore, kindly note that brushes in this material may now be considered as standardised for second string purposes. E/C. | ||
| Scan385 | Instruction sheet detailing a dynamo fault where solder was thrown from the commutator for the first time on a car with a cartridge field fuse. | ||
| View original record | ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.C. Order No. AC.63. Customer's No. X 4333 2. Nov. 1925 Dynamo F. from 6 GII. (X re brushes) This machine, fitted with X main and EG 3399 control brushes was sent… | ||
| Scan386 | Test reports for alternative brushes on 20 HP dynamos and the viability of further testing. | ||
| View original record | X4333 To FJA. from EFC. EFC4/T6.11.25. X.4333. BRUSH & COMM. TESTS on 20 HP. DYNAMOS. 57 Seg. Comm. with Le Carbone X Main and EG3399 Control Brushes. Attached are the various reports. (1) Do you… | ||
| Scan387 | The standardisation and stock management of brushes for the 20 HP Dynamo. | ||
| View original record | X4583 To. Wd. C. EFC. G. DY/AED. BY/RD2/ML.6.11.25. Referring to the standardisation of Morganite E.G.2 brushes D.51294/5 for the 20 H.P. Dynamo, it is understood that these are only to be used in… | ||
| Scan388 | Instruction sheet comparing the performance of X, EG3399, and Z grade dynamo brushes. | ||
| View original record | RR 238 (100 BKS.) (RH57.29-8-20.) MP 224358 X 4333 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC 12. Nov. 1925. Order No. AC. 65. Customer's No. X 4333 X and EG3399 Dynamo Brushes In answer to your queries… | ||
| Scan389 | Note concluding that further testing on LeCarbone Co. brushes is unnecessary as they are not an English product. | ||
| View original record | RR 238 [150 BKS.] (BH57.29-9-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To ________________________ 19 Order No. ______________ Customer's No. 2 Compared with 10/- for the Z and most other grades.… | ||
| Scan390 | Instruction sheet detailing a repeat test on X and EG3399 brushes, noting sparking, wear, and commutator segment condition. | ||
| View original record | RR 238 (150 BKS.) (SH57 29-6-20.) MP 224356 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Order No.: AC. 31. Customer's No.: XX4610, 4383 Repeat Test of X and EG3399 Brushes. (on dynamo B) The test of these… | ||
| Scan391 | Prolonged tests of Le Carbone dynamo brushes, concluding the new combination offers no advantage and is more expensive. | ||
| View original record | X4333 To R. from FC. c.c. E. CJ. c. By. Wor. EFC4/T30.11.25. 20 HP. DYNAMO - LE CARBONE GRADE X MAIN AND EG3399 CONTROL BRUSHES. Prolonged tests have been made of this combination on 20 HP. dynamos.… | ||
| Scan392 | Test report on main and control brushes for a 20hp dynamo. | ||
| View original record | RR 238(150 BKS.) (BH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. 30. Sept. 1924. To: EFC Order No. AC.26. Customer's No. X 4610 X4333 LFC2 Main and EG.3399B Control Brushes on 20hp dynamo… | ||
| Scan393 | Cross-reference note for correspondence on the Goshawk III brush and commutator system. | ||
| View original record | X4333 For further correspondence see X.5670 - Gos.III Brush & Comm. system. EFC. | ||