Rolls-Royce Archives
| Identifier | Entry | ||
| scan0001 | File cover for a 28 Slot Armature. | ||
| View original record | 8672. RR 68 (250T) (DB 925 S-525) J.H.D. 28 SLOT ARMATURE. | ||
| scan0002 | Statement concerning the adoption of an armature with 28 slots and 56 coils, with one of the coils being a lap coil. | ||
| View original record | X8672 18.1.27. X.1640. STATEMENT CONCERNING THE ADOPTION OF ARMATURE HAVING 28 SLOTS AND 56 COILS; X.8672. ONE OF THE COILS BEING A LAP COIL. Our present armature has 29 slots and 57 segments. In… | ||
| scan0003 | The calculation of conductor pitch and commutator connections for coils. | ||
| View original record | -2- Contd. With an equal conductor pitch, each pitch would be 27. This will not do, however, as, owing to the use of two coils per slot, the coils would not be in the correct positions in relation to… | ||
| scan0004 | Instruction to experimentally make two 28 slot armatures for a 40/50 HP dynamo to address a noise issue. | ||
| View original record | To BY/RD. from EFC. c. BY CHARGE TO ORDER CHARGE TO EXPENSE X 8672 EFC5/T6.4.27. 28 SLOT ARMATURE FOR 40/50 HP. DYNAMO. With reference to our note EFC4/T6.4.27, will you now please instruct to have… | ||
| scan0005 | Proposal to trial a new 28 slot armature for the Phantom Dynamo to reduce noise. | ||
| View original record | TO RHC C. EFC. x 8672 BY/RD1/ML 25.4.27. PHANTOM DYNAMO. 28 SLOT ARMATURE - SEC:8070 & 8090. In order to try to make the dynamo quieter we are proposing to try a 28 slot armature in a similar manner… | ||
| scan0006 | The performance and testing of the 40/50 N.B. type dynamo with an altered brush arrangement. | ||
| View original record | X8672 To R. from EFC. c. BJ. PN. c. E. Da. c. Wor. CWB. c. RG. BY. c. EP. EFC1/T9.5.27. 40/50 DYNAMO OF THE N.B. TYPE, i.e. ARRANGED WITH NARROWER BRUSHES THAN STANDARD, AND ALTERED ANGULAR… | ||
| scan0007 | Recommendation for machine re-arrangement and standardisation of brushes. | ||
| View original record | Contd. -2- EFC/T9.5.27. machine provides a very much bigger margin. Taking everything into consideration we are now in a position to strongly recommend this re-arrangement of the machine for… | ||
| scan0008 | Extract discussing issues and experiments with N.B. machines, armatures, and dynamos. | ||
| View original record | Contd. (Extract) -2- X.8671. EFCl/T4.6.27. It is not possible with the N.B. machine for the commutator solder to run in normal circumstances, as it is (just only) in the case of the present machine.… | ||
| scan0009 | New 28-slot armature for the Phantom dynamo, requesting a noisy machine for preliminary testing. | ||
| View original record | To Mx. from EFC. c. BY. BY/RD. X8672 EFC3/T9.6.27. We shall have ready on Monday next a 28 slot armature for the Phantom dynamo. We should be pleased if you could let us have on that day a noisy… | ||
| scan0010 | Request to fit a 28 slot armature to a faulty 40/50 dynamo. | ||
| View original record | EFC. X8672 13.6.27. 40/50 DYNAMO. Herewith dynamo No.TH.65. Moans very badly. Will you please fit 28 slot armature and return for test on chassis. J.Daykin. Carried out as requested. EFC. | ||
| scan0011 | The required alteration to a Phantom Dynamo 28 slot armature. | ||
| View original record | C. EFC. X8672 BY/RD11/ML17.6.27. PHANTOM DYNAMO - 28 SLOT ARMATURE. Referring to the 3 armatures you are building with 28 slots, after the test of the first one we find that the end connections… | ||
| scan0012 | Instruction to minimise the milling depth of dynamo armature slots to improve the magnetic circuit. | ||
| View original record | To BY/RD. from EFC. X8672 EFC5/T27.6.27. DYNAMO ARMATURE SLOTS. Woubd you please arrange that no armatures slots are milled deeper than is absolutely necessary in order to get in the standard… | ||
| scan0013 | Trial of a modified, less noisy TH65 dynamo for Phantom models. | ||
| View original record | EFC c.By X8672 Mx5/T27.6.27. re Phantom Dynamos - EFC3/J9.6.27. The originally noisy dynamo TH65 to which you fitted a 28 slot armature has been tried on 3 different chassis, and is now quite a good… | ||
| scan0014 | Responding to a report on a Phantom Dynamo with a 28 slot armature, discussing noisy brushes and high output. | ||
| View original record | X8672 To Mx. from EFC. c. EY. STANDARD PHANTOM DYNAMO BUT WITH 28 SLOT ARMATURE. (TH.65). We thank you for your report ref. Mx5/T27.6.27 We had noticed that the brushes were a little bit noisy, a… | ||
| scan0015 | Instructions and test results for a 28-slot armature in a dynamo. | ||
| View original record | SR 238 (10 BKS.) (SH57.29-6-29.) MP 224358 X8672 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Order No.: PC 141 Customer's No.: X Date: July 11th 1927 Armature With 28 Slots Attached is a rough sheet of… | ||
| scan0016 | Instruction concluding that for a 28-slot armature in a standard carcase, the B angle must be 9.5 degrees. | ||
| View original record | 22 239 (100 BKS.) (SH57. 29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To_________________________________19 Order No. PC 141 (2) Customer's No.___________________ All the curves are sharply… | ||
| scan0017 | Required alteration to the commutator position on a 40/50 HP dynamo 28-slot armature. | ||
| View original record | To RHC. from EFC. c. to BY/RD. X8672 EFC1/LG12.7.27. 8672 X.5661. 40/50 HP. DYNAMO. 28 SLOT ARMATURE. Herewith we hand you one of these armatures. To enable this to be entirely suitable for… | ||
| scan0018 | From EFC to RHC requesting alterations to two 40/50 dynamos. | ||
| View original record | To RHC. from EFC. X8672 EFC1/TS.8.27. 40/50 DYNAMO. We shall be pleased if you can complete the following items at your early convenience :- X.8672. EFC1/LG12.7.27. - 40/50 dynamo with 28 slot… | ||
| scan0019 | Test results for a 28 slot armature for a 40/50 Dynamo, detailing adjustments and performance at different 'B angles'. | ||
| View original record | X8672 E.F.C. 8.8.27. Copy figures onto Gelig copy X.8672. 28 SLOT ARMATURE FOR 40/50 DYNAMO. The first 28 slot armature when run in standard carcase gave a B angle of 7° and low output. The second and… | ||
| scan0020 | Urgent requirement for the 28 slot armature for the Phantom dynamo. | ||
| View original record | X8672 18.8.27. X.8672 - 28 SLOT ARMATURE. As the result of an enquiry on our part as to whether the 28 slot armature is still urgently required for the Phantom dynamo, the position appears to be as… | ||
| scan0021 | Requesting two 28 slot armatures for a 40/50 dynamo be slightly skimmed due to unevenness. | ||
| View original record | X8672 To HIC. from EFC. EFC1/T20.8.27. 40/50 DYNAMO - 28 SLOT ARMATURE. We hand you herewith two 28 slot armatures. We should be pleased if you would have these slightly skimmed, as there appears to… | ||
| scan0022 | Performance curve graph for a 40/50 HP Dynamo, plotting ampere output and operating voltage against dynamo RPM. | ||
| View original record | 40/50 I.S.22 AMPERE OUTPUT OPERATING VOLTAGES SPECIFIED CURVE OF OUTPUT REQUIREMENTS FOR 40/50 H.P. DYNAMO REPRESENTATIVE OUTPUT CURVE OF STANDARD 40/50 H.P. DYNAMO AT 20°C REPRESENTATIVE OUTPUT CURVE… | ||
| scan0023 | Instructions detailing tests performed on a 28 slot armature in a standard (NB) machine. | ||
| View original record | RR 238 (150 BKS.) (DB 451-8-12-24) MP 306975 X 8672 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.C. Order No. P.D.7. Customer's No. X 8671 X8672 Oct. 18th 1927 28 Slot Armature in Standard (NB) Machine. The… | ||
| scan0024 | Instruction sheet detailing performance test results for three different armatures. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. P.D.7. (2) Customer's No. 19 output were made, and the representative performance curve for each armature… | ||
| scan0025 | Graph plotting Dynamo ampere output and operating voltage against Dynamo RPM and chassis MPH. | ||
| View original record | 40/50 AMPERE OUTPUT OPERATING VOLTAGES REPRESENTATIVE OUTPUT CURVE AT 80°C OF STD DYNAMO WITH E.J.B. MODIFICATION SPECIFIED CURVE OF OUTPUT REQUIREMENTS FOR PHANTOM DYNAMO REPRESENTATIVE OUTPUT CURVE… | ||
| scan0026 | Standardising 28 slot armatures for 20 HP and 40/50 HP dynamos to cure noise issues. | ||
| View original record | R. from EFC. c. BJ. E. c. Da. Wor. c. Ev. X.8677 EFC5/T3.11.27. 20 HP. & 40/50 HP. CHASSIS. X5661 -DYNAMOS- You will remember that about five months ago we standardised the 28 slot armature for the 20… | ||
| scan0027 | Technical memorandum discussing noise and heating improvements in N.B. machines. | ||
| View original record | -2- Contd. noise trouble being cured in this case also. We have had practically no suggestion of armature noise from the experimental N.B. machines. At present it does not appear that it will be… | ||
| scan0028 | Standardization and production of the N.B. type dynamo for the 40/50 chassis, detailing testing and noise issues. | ||
| View original record | Hs To BY. ) from EFC. WOR. ) c. Hs. [STAMP: RECEIVED NOV 3 1927] X8672 EFC4/T3.11.27. N.B. TYPE DYNAMO FOR 40/50 CHASSIS. X8672 On 10.5.27, we completed and circulated a standardisation sheet for the… | ||
| scan0029 | Experimental proof for the use of 28 slot armatures on 40/50 HP dynamos. | ||
| View original record | X8672 To EY. from EFC, c. Mr. Brock. c. MX. Wor. EFC4/T16.11.27. RE 40/50 HP. DYNAMOS. X8660 X8671 We have had further experimental proof, carried out by the Test Dept. in conjunction with ourselves,… | ||
| scan0030 | The dynamos for the 40/50 HP chassis, focusing on the commutator and a narrow brush machine. | ||
| View original record | EFC. c. Mx. c. Wor. c. Mr. Bock. X8672 BY2/G.21.11.27. 40/50 HP. CHASSIS. DYNAMOS. Referring to EFC.4/T.16.11.27. I have gone very carefully into the position, but in view of the fact that it would be… | ||
| scan0031 | Programme of work for testing a 28 slot armature on an N.B. machine. | ||
| View original record | To CAP. from EFC. X.8672 EFC3/T10.1.28. PROGRAMME IN CONNECTION WITH 28 SLOT ARMATURE ON N.B. MACHINE. (1) Put back the 90° B angle 28 slot armature in N.B. J machine. Re-set the control brush to… | ||
| scan0032 | Alteration of 28 slot armatures for 40/50 NB machines. | ||
| View original record | To EY/RD. from EFC. X8672 EFC4/T26.1.28. 28 SLOT ARMATURES FOR 40/50 NB. MACHINES. You will remember we have had three 28 slot armatures with varying B angles. One of these (the middle one) has been… | ||
| scan0033 | The alteration of three 28-slot armatures. | ||
| View original record | X8672 C. EFC. BY/RD4/ML.28.1.28. 28 SLOT ARMATURE - D.71347/8. We have made 3 armatures to the above piece numbers, one of which was altered to EFC's instructions, this alteration having proved… | ||
| scan0034 | Amended specification and test for an N.B. type dynamo for EAC. | ||
| View original record | X8672 To EY. from EFC. c. Mr. Brock. c. Mx. EFC7/T7.3.28. R.R. EAC. DYNAMO OF THE N.B. TYPE. Herewith please receive amended copy of the Specification of production inspection and test of the N.B.… | ||
| scan0035 | Requesting an experimental N.B. dynamo I be fitted to chassis 9-EX, replacing dynamo RE.25. | ||
| View original record | To RHC. from EFC. c. Hs/AJL. X8672 EFC3/T11.4.28. Herewith we hand to you N.B. dynamo I which is fitted with one of the experimental 28 slot armatures, and also with type EG2 Morganite brushes. It is… | ||
| scan0036 | Requesting the standardisation sheet for the Phantom Dynamo Armature to be issued upon completion of tests. | ||
| View original record | X8672 To EFC. BY/RD6/ML18.6.28. PHANTOM DYNAMO ARMATURE. We are ordering material for a further series of Phantom chassis and in view of our conversation propose to instruct the 28 slot Armature, will… | ||
| scan0037 | Query regarding the suitability of a 28 slot armature for a narrow brush machine, originally specified for a wide brush machine. | ||
| View original record | X8672 To EFC. BY/RD2/ML.5.7.28. 28 SLOT ARMATURE - PHANTOM DYNAMO. In preparing this armature for production I noticed in EFC1/LG.12.7.27 which refers to an alteration in the commutator position the… | ||
| scan0038 | Standardisation sheet and recommended control brush angle for the Phantom dynamo's 28 slot armature. | ||
| View original record | To BY/RD. from EFC. X8672 EFC5/T19.7.28. PHANTOM DYNAMO WITH 28 SLOT ARMATURE. Referring to your BY/RD6/M18.6.28, we are now circulating a standardisation sheet for the 28 slot armature for the… | ||
| scan0039 | List of angles for different configurations of the Phantom 28 slot dynamo. | ||
| View original record | X8672 20.7.28. PHANTOM 28 SLOT DYNAMO (N.B.) ANGLES. Remarks. Standard 29 slot 8º 121º I on 9-EX with 28 slot armature 7.5º 122º Half way to M.P. K on 12-EX with 28 slot armature 9º 122.5º M.P.… | ||
| scan0040 | Electrical experimental record sheet for a 28-slot armature, detailing tests, modifications, and mileage. | ||
| View original record | ELECTRICAL EXPERIMENTAL RECORD SHEETS X-8672 X. & No: - 8672 28 Slot Armature 3 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total… | ||
| scan0041 | Standardisation and 10,000-mile test of a Phantom Dynamo 28 slot armature. | ||
| View original record | X8672 To R. from EFC. c. BJ. PN. c. BY. E. c. Da. Wor. EFC2/T20.9.28. PHANTOM DYNAMO 28 SLOT ARMATURE. A standardisation sheet for this item dated 20.7.28 was issued but awaits BJ's signature. It was… | ||
| scan0042 | 10,000 mile test report on a 28 slot armature. | ||
| View original record | EFC. PD.30. Sept. 19th 1928. 10,000 MILE TEST OF 28 SLOT ARMATURE. The 10,000 miles test of the 28 slot type of armature was commenced 22.3.28 on 12-EX. No.3. The armature was run in the carcass of K.… | ||
| scan0043 | Standardisation of a 40/50 HP. Dynamo 28 slot armature to improve silence and commutation. | ||
| View original record | RR 755 REVISED (10H) (D.C. 777 - 29 - 2 - 28) MS C. LTD X8672 COMPLETED 2.10.28 STANDARDISATION of CHASSIS PARTS. Description of Parts. 40/50 HP. DYNAMO - 28 SLOT ARMATURE. Origin. Further improvement… | ||
| scan0044 | Questionnaire detailing the introduction of a new part for a chassis series. | ||
| View original record | (1) The number of the first chassis on which the new part will be fitted. H. series. (2) Date when the chassis will be handed to test. 28.1.29 (3) Cost of scrapped material, if any. Nil. (4) Cost of… | ||
| scan0045 | Instruction to supersede a Commutator End Bracket with a new design for the Phantom Dynamo due to a change in hole position. | ||
| View original record | To Sft. C. Wks. C. EFC. X 8672 BY/RD5/ML17.10.28. PHANTOM DYNAMO (28 SLOTS). COMMUTATOR END BRACKET D.71250.DC & D.71715.DC. We have instructed D.71715.DC to supersede D.71250.DC at the commencement… | ||
| scan0046 | Electrical experimental record sheet for a 28-slot armature. | ||
| View original record | Y8672 ELECTRICAL EXPERIMENTAL RECORD SHEETS X.&No:- 8672 28 Slot Armature / Date on | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles.… | ||
| scan0047 | The specification for the inspection and test of an R.R. EAC. Dynamo with a 28 slot armature. | ||
| View original record | X8672. To EY. from EFC. c. Mr. Brock. EFC/T19.12.28. Herewith please receive copy of Specification of Inspection and Test of R.R. EAC. Dynamo (N.B.) with 28 slot armature. It will be noted that this… | ||
| scan0048 | Specification for the inspection and test of the N.B. type Dynamo with 28 slot armature. | ||
| View original record | 19.12.28. R.R. EAC. DYNAMO OF THE N.B. TYPE WITH 28 SLOT ARMATURE. SPECIFICATION OF INSPECTION AND TEST. VERSION 7. Applicable to normal output dynamos with 28 slot armatures, and S.S. type dynamos.… | ||
| scan0049 | Continuation of instructions for dynamo testing and brush bedding procedures. | ||
| View original record | -2- Contd. (e) The connections of the pigtail conductors are not in any way damaged. (f) The initial bedding of the brush shows partial contact reasonably well distributed over the working surface.… | ||
| scan0050 | Instructions for testing and running a dynamo, detailing brush bedding and performance checks. | ||
| View original record | -3- Contd. ferentially, and between the bottom of the holder and the commutator, do not exceed the specified amount. Also that the bedding of the spring on the bevel of the brush and of the brush on… | ||
| scan0051 | Inspection and testing procedures for machine components including armatures, bearings, and insulation. | ||
| View original record | -4- Contd. (9) Examine also for rubbing armature, slack bearings, cracked insulation and final condition of commutator and brush surfaces, and see also that with the dynamo hot, the end cover can… | ||
| scan0052 | Correcting the angle for the control brush on a Phantom dynamo with a 28 slot armature. | ||
| View original record | X8672 To BY/RD. from EFC. EFC4/T30.1.29. PHANTOM DYNAMO WITH 28 SLOT ARMATURE We are now able to say that the angle between the control brush and the positive main brush on the Phantom dynamo with the… | ||
| scan0053 | Electrical experimental record sheet for a 28 slot armature. | ||
| View original record | X. 8672 ELECTRICAL EXPERIMENTAL RECORD SHEETS 28 Slot Armature 2 X. &No:- 8672 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total… | ||
| scan0054 | Request to have a 40/50 dynamo armature commutator skimmed for testing a special grade of brush. | ||
| View original record | RHC. from EFC. X.8672 EFC/T9.2.29. We are handing to you herewith a 40/50 dynamo armature which has run over 12,000 miles, and the commutator of which has worn a little uneven. Would you kindly have… | ||
| scan0055 | Request to borrow two Phantom dynamo machines built with thinner armature stampings for performance testing. | ||
| View original record | X 8672 To Mr. Brock. EFC4/T13.2.29. We understand that the thinner armature stampings with varnish insulation are now being brought in for the production of the Phantom dynamo, and we should be… | ||
| scan0056 | Optimal number of slots and conductor sizes for an intermediate output armature to reduce noise. | ||
| View original record | X.8672 BY. from EFC. c. to BY/RD. EFC4/LG21.2.29. INTERMEDIATE OUTPUT ARMATURE. x8664 As referred to in our EFC1/LG20.2.29. we have now looked closely into the matter of an intermediate output… | ||
| scan0057 | Recommendations for an experimental 24-slot Phantom armature design, comparing it to 28 and 32-slot versions. | ||
| View original record | contd :- -2- (1) Though the total iron armature section is somewhat less than in the 32 slot case, the copper resistance is less to a much greater extent, thus providing a better alround performance.… | ||
| scan0058 | Specification for production inspection and testing of R.R. Phantom and S.S. type dynamos with 28 slot armatures and thinner armature stampings. | ||
| View original record | X8672 BY. from EFC. 66 Mr. Brock. EFC2/T10.4.29. Herewith please receive Specification of Production Inspection and Test applicable to R.R. Phantom and S.S. type dynamos with 28 slot armatures and… | ||
| scan0059 | Specification of Inspection and Test for Phantom & S.S. dynamos with 28 slot armatures. | ||
| View original record | EFC/T10.4.29. R.R. PHANTOM & S.S. DYNAMOS WITH 28 SLOT ARMATURES WITH THINNER STAMPINGS. SPECIFICATION OF INSPECTION AND TEST. VERSION 9. Applicable to dynamos as above. Upon receipt of the machine… | ||
| scan0060 | Page of procedures for testing and bedding the brushes of a dynamo. | ||
| View original record | -2- Contd (e) The connections of the pigtail conductors are not in any way damaged. (f) The initial bedding of the brush shows partial contact reasonably well distributed over the working surface.… | ||
| scan0061 | Page of test procedures for a dynamo, detailing final brush bedding and various running tests. | ||
| View original record | -3- Contd. circumferentially, and between the bottom of the holder and the commutator, do not exceed the specified amounts. Also that the bedding of the spring on the bevel of the brush and of the… | ||
| scan0062 | Inspection and testing procedures for an electrical machine, focusing on insulation and mechanical condition. | ||
| View original record | -4- Contd. (9) Examine also for rubbing armature, slack bearings, cracked insulation and final condition of commutator and brush surfaces, and see also that with the dynamo hot, the end cover can be… | ||
| scan0063 | Production test results log for PI type dynamos with 28 slot armatures. | ||
| View original record | X.8672 PRODUCTION TEST. X.8671. R. R. EAC. DYNAMO X.8781 do. (NARROWER BRUSH MACHINES) WITH 28 SLOT ARMATURES. PI type. | Date. | Dynamo Number. | (1) Remarks. | (2)(3)(4) Remarks. | (5) Output at… | ||
| scan0064 | From EFC to Mr. Brock regarding the return of two dynamos borrowed for performance testing with thinner armature stampings. | ||
| View original record | X8672 Mr. Brock. from EFC. EFC4/T10.4.29. We return herewith the two dynamos YH.15.N.B.28S and YH.35.NB.28S, borrowed for the purpose of ascertaining what difference in the performance of the machine… | ||
| scan0065 | Reference note for correspondence regarding a 40/50 N.B. dynamo with 28 slot armature. | ||
| View original record | X.8672 For further correspondence re 40/50 N.B. dynamo with 28 slot armature, see X.7660. EFC. | ||
| scan0066 | Specification sheet for an armature, detailing its coil, slot, and conductor configuration. | ||
| View original record | X 8672 ARMATURE:- 28/56/4. NO. OF SLOTS OR COIL FORMATIONS 28 ✓ NO. OF COIL OR COMM. BARS 56 " " CONDUCTORS TO COMM. 112 " " CONDUCTORS. 448 COILS PER SLOT. 2 TURNS PER COIL. 4 CONDUCTORS PER SLOT. 16… | ||
| scan0067 | To Mr. Brock regarding the monthly test of a 40/50 chassis dynamo. | ||
| View original record | X.8672 Mr. Brock. from EFC. EFC2/AD23.10.29. MONTHLY PRODUCTION MACHINE. We are expecting to receive from you a 40/50 chassis dynamo for monthly test. EFC. | ||
| scan0068 | Urgently requesting information concerning the present production 40/50 dynamo. | ||
| View original record | X8672 To Mr. Brock from EFC. EFC3/ADL.11.29. X.8672. MONTHLY PRODUCTION MACHINE. We should be pleased to have the dynamo referred to in EFC2/AD23.10.29, as we rather urgently require field current… | ||
| scan0069 | Replacement of a 40/50 HP dynamo. | ||
| View original record | X8672 MR. Strong. from EFC. EFC4/AM.2.11.29. X,8672. 40/50 HP. DYNAMO. We hand you herewith, dynamo I, which is to replace the machine (dynamo HO1) taken off 12-EX and returned to us by you as… | ||
| scan0070 | Customer complaints about insufficient dynamo output at high speeds. | ||
| View original record | X8664 To R. from EFC. c. BJ. E. c. BY. PN. c. Hm. Wor. EFC3/T27.2.28. X.8660 X.8664. X.5663. INSUFFICIENT DYNAMO OUTPUT AT HIGH SPEEDS. We have had several complaints (four, I think) all comparatively… | ||
| scan0071 | Modifying a dynamo's armature winding to handle the higher electrical load of large headlamps. | ||
| View original record | Contd. -2- EFC3/T27.2.28. to Barcelona using very big consumption head lamps. A dynamo of our present size which would be capable of covering such a night load at high speeds would be entirely… | ||
| scan0072 | Insufficient dynamo output on 20 HP & 40/50 HP models, with suggestions for improvement. | ||
| View original record | EFC. } from R. Hs. } Le Canadel. E. } c. BJ. Wor. FN. C. BY. CWB. SG. x8664 R5/M9.3.28. REC'D & DESPATCHED FROM WW.13.3.28. 20 HP. & 40/50 H.P. INSUFFICIENT DYNAMO OUTPUT. x5663 x8780 Our dynamo is… | ||
| scan0073 | Specifications for a new 40/50 HP dynamo armature with a larger output and higher cutting-in speed. | ||
| View original record | X8664 To BY. from EFC. c. BY/RD. EFC3/T28.3.28. 40/50 H.P DYNAMO ARMATURE FOR LARGER OUTPUT WITH HIGHER CUTTING-IN SPEED. we have now carefully considered this matter and have decided that what we… | ||
| scan0074 | Testing and suggestions for increasing the output and speed of 20 HP and 40/50 HP dynamos. | ||
| View original record | X8664 28.3.28. 20 H.P. AND 40/50 H.P. DYNAMOS FOR GREATER OUTPUT AND HIGHER CUTTING IN SPEED. X.5663 X.8664. A 28 slot half paralleled 20 H.P. armature was tried. The cutting in speed at 80°C (14… | ||
| scan0075 | Page of engineering calculations for component dimensions, including slot and neck measurements. | ||
| View original record | -2- Contd. Increased width of slot = .016" New " " = .166" On depth of slot we save 2 x .048 = .096" and spend 6 x .008 = .048" i.e. depth of slot is less by .048" and will therefore be .487". Slot is… | ||
| scan0076 | Calculations and proposal for a 20 HP short-chorded armature design. | ||
| View original record | -3- Contd. This is less than before whereas we want more. Therefore we suggest 26 or 24 slots each .166 x .487" Oce at neck = 7.07" in each case. 1/26 of this = .272 Slot = .166 Neck = .106 1/24 of… | ||
| scan0077 | Calculations and design specifications for a 40/50 Case armature, page 4. | ||
| View original record | -4- Contd. 40/50 Case. Suggest first a 28 slot armature with three turns per coil instead of four. Since the area of C.S. of conductor is to be increased in the ratio of 4/3, the wire diameter will be… | ||
| scan0078 | Page of calculations and specifications for conductor-pitch winding and slot dimensions. | ||
| View original record | -5- Contd. This is too small compared with previous neck of .102" Hence we adopt 26 slots each .186 by .536. Oce at neck = 7.67" 1/26 of this = .295" Slot = .186" Neck = .109" which is slightly better… | ||
| scan0079 | Modifications to the dynamo armature to increase output at high speeds. | ||
| View original record | X8664 To R. from EFC. c. BJ. E. DA. c. BY. PN. Wor. EFC4/T30.3.28. INSUFFICIENT DYNAMO OUTPUT AT HIGH SPEEDS. (Refs. EFC3/127.2.28 and R5/M9.3.28). X8760 X 5663 It appears difficult to prevent… | ||
| scan0080 | Specification table for 26 slot dynamo armature windings for 20 HP and 40/50 HP models. | ||
| View original record | X8664 14.4.28 PARTICULARS OF 26 SLOT DYNAMO ARMATURE WINDINGS. 20 H.P. 40/50 H.P. Type of winding. Ret. wave. Ret. wave. No. of slots. 26 26 No. of conductors. 312 312 Conductors/slot. 12 12… | ||
| scan0081 | Improvements to car dynamo output and design. | ||
| View original record | EFC. ) FROM R. HS. } (At Le Canadel.) BY. } X8664 R2/M18.4.28. REC'D AT WW. & DESPATCHED 21. 4. 28. C. to BJ. WOR. E. DA. -C. SG. CAR DYNAMOS. OUTPUT. X8664 X5065 I think there is little doubt that we… | ||
| scan0082 | Replying to an enquiry about a delay in completing work on two 26 slot armatures. | ||
| View original record | EFC. X8664 20.4.28. In reply to an enquiry, Mr. Davis stated that owing to pressure of other work he has been unable to make any progress with the work on the two 26 slot armatures. He could only say… | ||
| scan0083 | Modifications to dynamo design, specifically altering pole pieces and armature slots, to improve output. | ||
| View original record | X 8664 EFC2/T23.E.28. To R. from EFC. c. BJ. E. c. De. BY. c. Wor: C. c. SG. DYNAMO OUTPUT. X 8664 X 8663 Your ref. R2/M18.4.28. We are giving good attention to the matter of a dynamo for a less… | ||
| scan0084 | Design changes for a dynamo armature to achieve augmented output. | ||
| View original record | X8664 To BY. from EFC. c. BY/RD. EFC1/T23.4.28. X5663 DYNAMO FOR AUGMENTED OUTPUT AT THE HIGHER SPEEDS. With reference to our notes EFC4/T28.3.28 and EFC3/T28.3.28 dealing respectively with 26 slot… | ||
| scan0085 | Two dynamo armatures with different speeds and outputs for the Phantom model. | ||
| View original record | EFC. from R. c. BJ. Hs. BY. X8664 R5/M25.4.28. PHANTOM DYNAMO - 2 ARMATURES FOR DIFFERENT SPEED & OUTPUT: X.8664. Referring to your EFC2/T23.4.28, I am not very particular whether you have 26 or 28… | ||
| scan0086 | Specification for modifying 40/50 and 20 HP dynamo armatures for greater output at higher speeds. | ||
| View original record | X8664 To BY. from EFC. c. BY/RD. EFCB/T25.4.28. 40/50 and 20 H.P. DYNAMO ARMATURES FOR GREATER OUTPUT AT HIGHER SPEEDS. X5663 Further to our EFC1/T23.4.28, we now confirm that 40/50 and 20 H.P.… | ||
| scan0087 | Modifications to an N.B. type dynamo for higher output at higher speeds. | ||
| View original record | X8664 To RHC. from EFC. EFC1/T27.4.28. N.B. TYPE DYNAMO MODIFIED FOR HIGHER OUTPUT AT THE HIGHER SPEEDS. Herewith we hand to you N.B. dynamo L. We should be pleased if you would have a modification… | ||
| scan0088 | Investigation into a modified wide brush dynamo with an initially excessive output, which was altered to meet requirements. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12 24) MP 306975 ROLLS-ROYCE, LTD. INSTRUCTIONS. To: EFC Order No.: P.D.23. Customer's No.: X 8664 Date: April 28th 1928 Dynamo With Higher Average Output. As an immediate… | ||
| scan0089 | Instruction note comparing a modified machine's electrical output against a standard one, referencing attached performance curves. | ||
| View original record | RR 239 (150 BKS.) (DB 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To____________________.19____ Order No. P.D. 23 (2) Customer's No.________________ From this curve the modified type of… | ||
| scan0090 | Modifying 20 HP and 40/50 HP dynamos for greater output and higher cutting-in speed. | ||
| View original record | X8664 4.5.28. 20 H.P. AND 40/50 H.P. DYNAMOS FOR GREATER OUTPUT AND HIGHER CUTTING IN SPEED. X5663 A 28 slot half paralleled 20 H.P. armature was tried. The cutting in speed at 80°C. (14 volts) was… | ||
| scan0091 | Page of engineering calculations for component dimensions such as slot and neck depths. | ||
| View original record | -2- Contd. Increased width of slot = .016" New " " = .166" On depth of slot we save 2 x .048" = .096" and spend 6 x .008 = .048" i.e. depth of slot is less by .048" and will therefore be .487. Slot is… | ||
| scan0092 | Calculations for a 40/50 case armature redesign, changing from four to three turns per coil. | ||
| View original record | -3- 40/50 Case. Suggest first a 28 slot armature with three turns per coil instead of four. Since the area of C.S. of conductor is to be increased in the ratio of 4/3, the wire diameter will be… | ||
| scan0093 | Request to manufacture a higher output dynamo armature for a 40/50 chassis. | ||
| View original record | X8664 [RECD?] C. EFC. BY/RD6/ML9.5.28. RE 40/50 CHASSIS - DYNAMO ARMATURE - SEC:8070. R2/M.18.4.28. Will you please put in hand one armature to the prints sent herewith, this is arranged to give a… | ||
| scan0094 | Modification of a standard 40/50 HP dynamo (CH.85) for higher output. | ||
| View original record | X8664 To By/Cgh. from EFC. c. Hs/CEP. EFC2/T19.5.28. Herewith we hand to you late standard 40/50 H.P. dynamo CH.85 (unmodified). This is the machine we have selected in accordance with your request,… | ||
| scan0095 | Instructions for modifying Phantom chassis dynamos to increase output. | ||
| View original record | [REDACTED] C. EFC. X8664 BY/Cgh1O/K. 21. 5. 28. PHANTOM CHASSIS DYNAMOS. With reference to Yellow Sheet Y.38472 dated May 21st. instructing us to supply 4 modified dynamos to give a higher output, one… | ||
| scan0096 | Instruction memo regarding testing a modified Dynamo, No. CH 85 M, and arranging for its despatch. | ||
| View original record | RR 238 (150 BKS.) (SH57. 29-6-20.) MP 224358 X8664 ROLLS-ROYCE, LTD. INSTRUCTIONS. To: E7C Date: 6 - 6 - 1928 Order No. Customer's No. Herewith Dynamo No. CH 85 M. This is the one we had from you for… | ||
| scan0097 | Short memo confirming the handover date of a Phantom Chassis Dynamo. | ||
| View original record | X8664 BY D/MP. REC. EFC. BFT/JMW2/IRM.9.6.28. PHANTOM CHASSIS DYNAMOS. Memo. BY/Cgh10/K.21.5.28. Please note - the Dynamo in question was handed to EFC. on the 6th May. BFT/JMW. | ||
| scan0098 | Modified Phantom dynamo with higher output. | ||
| View original record | X8664 By/Mtn. from EFC. EFC1/T14.6.28. PHANTOM DYNAMO MODIFIED FOR HIGHER OUTPUT. We hand you herewith dynamo CH.85.M which is the one originally belonging to this Dept. which has been modified by Mr.… | ||
| scan0099 | Customer complaint about an inefficient dynamo on a Phantom chassis and arranging for a replacement. | ||
| View original record | X8664 EFC. D/EP2/CG18.6.28 Re: Phantom chassis dynamos. We have received the following enquiry from Paris in regard to a dynamo for chassis 51-MF:- "We have received a letter from this owner deploring… | ||
| scan0100 | Instruction regarding the modification of Dynamo poles on a Phantom CH85M for increased output. | ||
| View original record | RR 238 (130 BKS.) (SH57.29-6-20.) MP 224358 X8664 ROLLS-ROYCE LTD. INSTRUCTIONS. To: ETC Order No.: Customer's No.: Herewith Dynamo Phantom. CH85M We have ~~altered~~ We have trailed the Poles on this… | ||
| scan0101 | Customer enquiries for higher output dynamos and the solution for high-speed overcharging issues. | ||
| View original record | To RHC. from EFC. c. BY. BY/RD. X8664 EFH/T23.6.28. X5663 We are constantly receiving enquiries for higher output dynamos for customers, some of which we have met partially by machines which have… | ||
| scan0102 | Retesting of a twice-modified Phantom Dynamo CH.85 for higher output. | ||
| View original record | To BY/Mtn. from EFC. X8664 EFC3/T26.6.28. PHANTOM DYNAMO CH.85 TWICE MODIFIED FOR HIGHER OUTPUT. We have now retested this machine since the second and increased tapering of the pole pieces, and we… | ||
| scan0103 | Replacement dynamo for Phantom Chassis No. CH.85, for a customer in Paris. | ||
| View original record | X8664 BR. C. EFC. C. Hn. C. Sft. RECEIVED 27 JUN 1928 BY/Mtn2/K. 27. 6. 28. PHANTOM CHASSIS DYNAMO NO. CH.85. Referring to D/BP2/OG18.6.28., we have received from EFC. a further dynamo that he… | ||
| scan0104 | Time and cost calculation sheet for assembly G.6347. | ||
| View original record | ALLOWED TIME & BURDEN L.O.P. sg.(10) SHEET No. 8. (9.) I.S. Sec = 6030 ASSEMBLY NO. G.6347 REVISED STANDARD. BURDEN LABOUR K.4410 K.4508 K.4509 Carried Forward TOTAL OPERATING ALLOWED TIME TOTAL… | ||
| scan0105 | Higher output armatures for 20 HP and 40/50 HP dynamos, discussing testing and supply. | ||
| View original record | X8664 To BY/Cgh. from EFC. EFC1/T14.7.28. X5663 (crossed out) X8664 20 H.P. & 40/50 H.P. HIGHER OUTPUT ARMATURES. As reported in our EFC5/T11.7.28, we received a 20 H.P. dynamo with higher output… | ||
| scan0106 | The experimental testing and handover of a higher output armature for the Phantom. | ||
| View original record | To BY. from EFC. X8664 EFC2/T30.8.28. We have now experimentally tested the higher output armature for the Phantom and you will be receiving a general report in due course. We were, however, only… | ||
| scan0107 | Experimental test results for a Phantom dynamo with a coarser gauge armature for higher output. | ||
| View original record | R. from EFC. c. BJ. E. c. Da. Ey. c. Wor. PN. X8664 EFC1/T31.8.28. PHANTOM DYNAMO WITH COARSER GAUGE ARMATURE FOR HIGHER OUTPUT. We have now experimentally tested this higher output armature in our… | ||
| scan0108 | Performance tests on a higher output dynamo armature, including brush settings and commutation results. | ||
| View original record | -2- Contd. of output of the machine, in comparison with the represent- ative standard output, is attached. In the cold condition (17°C) the balancing speed of the standard dynamo with higher output… | ||
| scan0109 | Blueprint chart showing the representative performance curve of a J Machine Dynamo. | ||
| View original record | 40/50 AMPERE OUTPUT OPERATING VOLTAGES HIGHER-OUTPUT ARMATURE REPRESENTATIVE OUTPUT CURVE OF STANDARD PHANTOM NB DYNAMO AT 80°C (δ=121°) SPECIFIED CURVE OF OUTPUT REQUIREMENTS FOR 40/50 HP DYNAMO… | ||
| scan0110 | Higher output dynamo for a 12-EX machine, detailing parts required and modifications. | ||
| View original record | X8664 C. EFC. BY/RD7/ML13.9.28. DYNAMO FOR 12-EX. HIGHER OUTPUT MACHINE. The higher output armature has now been tested in the Experimental rig and it is proposed to put this on to the 12-EX car, in… | ||
| scan0111 | The delivery of a higher output dynamo armature for a Phantom model. | ||
| View original record | X8664 To RHC. from EFC. EFC1/T14.9.28. HIGHER OUTPUT DYNAMO- PHANTOM. Referring to EY/RD7/ML13.9.28, herewith we hand to you higher output armature referred to. We shall be pleased to receive the… | ||
| scan0112 | Materials to build 12 higher output dynamos for the Phantom. | ||
| View original record | X8664 To: NOW. [struck through] Cc: EFC. [struck through] Cc: DPC. [struck through] Cc: St'g/H Brook. [struck through] Cc: O/Ins. [struck through] Cc: Siff Depts. [struck through] Cc: EFC. [struck… | ||
| scan0113 | Cancelling a previous instruction regarding a modified dynamo and requesting its return. | ||
| View original record | To RHC. from EFC. X8664 EFC4/T25.9.28. N.B. DYNAMO MODIFIED FOR HIGHER OUTPUT AT THE HIGHER SPEEDS. Would you kindly note that our instruction EFC1/T27.4.28 is now cancelled in view of the fact that… | ||
| scan0114 | Requesting three higher output Phantom dynamos for confirmatory testing. | ||
| View original record | X.8664 To BY. from EFC. c. BY/RD. E. SFT/Mr. Brock. EFC1/T1.10.28. PHANTOM DYNAMO (HIGHER OUTPUT). Referring to BY/RD5/ML17.9.28, we have had one higher output Phantom dynamo through our hands… | ||
| scan0115 | Critique of the Phantom dynamo's inability to charge the battery with headlights on and a proposal for a new design. | ||
| View original record | Y8664 S/W (Hs.) copy to CWB. hr. PN23/LH2.10.23. A criticism has been made recently of our dynamo on the Phantom in France, that we do not enable the batteries still to be charged when using… | ||
| scan0116 | Report to Mr. Royce and a customer's suggestion for the Chief Engineer. | ||
| View original record | 18664 To By/Cgh. EFC6/T3.10.28. Referring to your request for my comments on the attached, which I now return, will you please see our report to Mr. Royce, ref. EFC3/T3.10.28 (copy BY). You may… | ||
| scan0117 | Customer's suggestion for a higher output 'dual debit' dynamo. | ||
| View original record | To R. from EFC. c. BJ. E. c. EY. PN. c. CWB. X8664 EFC3/T3.10.28. RE DYNAMO. X.8671. X.8664. One of our customers who sent us an enquiry for a higher output dynamo suggests a dynamo with a "dual… | ||
| scan0118 | Design implications of a higher output dynamo, specifically the increase in weight and size. | ||
| View original record | W/S To PN. from EFC. X 8664 EFC1/T4.10.28. DYNAMO WITH TWO RATES OF CHARGES Referring to PN28/LH2.10.28, please see our report EFC3/T3.10.28. You have already received reports concerning the higher… | ||
| scan0119 | Request to receive two 40/50 dynamos, D.71914, for testing. | ||
| View original record | X8664 EFC. 14.11.28. Please receive 2 40/50 dynamos D.71914 (higher output machines) for testing. No.3. N.B. HO. 4. N.B. HO. B Wolstenholme. | ||
| scan0120 | Reporting the satisfactory test of a Phantom Dynamo with higher output and outlining further steps. | ||
| View original record | X8664 To Mr. Brock. EFC7/T15.11.28. PHANTOM DYNAMO WITH HIGHER OUTPUT. We have now duly tested the first of these machines to be handed to us, No.2 NB.HO. We find this to be satisfactory in every… | ||
| scan0121 | Return and successful testing of a loaned higher output dynamo machine. | ||
| View original record | Mr. Brock from EFC. X8664 EFC3/T22.11.28. We return herewith the second of the three higher output machines dynamo 3.NB.HO., loaned to us for test.. This machine has passed our tests and is O.K. for… | ||
| scan0122 | Production specification for inspection and testing of an R.R. EAC. Dynamo of the N.B. type with a higher output armature. | ||
| View original record | X8664 To BY. from EFC. " Mr. Brock. EFC2/T4.12.28. R.R. EAC. DYNAMO OF THE N.B. TYPE WITH HIGHER OUTPUT ARMATURE Herewith please receive production specification of inspection and test in connection… | ||
| scan0123 | Specification of inspection and test for an R.R. EAC. Dynamo of the N.B. type with a higher output armature. | ||
| View original record | 4.12.28. X.8781do. R.R. EAC. DYNAMO OF THE N.B. TYPE X.8664 WITH HIGHER OUTPUT ARMATURE. SPECIFICATION OF INSPECTION AND TEST. VERSION 8. Applicable only to dynamos with higher output armatures. Upon… | ||
| scan0124 | Test procedure for a dynamo, detailing brush bedding, insulation resistance, and clearance checks. | ||
| View original record | -2- Contd. (e) The connections of the pigtail conductors are not in any way damaged. (f) The initial bedding of the brush shows partial contact reasonably well distributed over the working surface.… | ||
| scan0125 | Testing procedures and specifications for a dynamo, including brush bedding and running tests. | ||
| View original record | -3- Contd. the brush on the commutator are O.K. Failing to quieten noisy brushes in this way, the armature should be removed and the commutator skimmed, before proceeding with the final running test.… | ||
| scan0126 | Inspection and testing procedures for an electrical machine, page 4. | ||
| View original record | -4- (9) Examine also for rubbing armature, slack bearings, cracked insulation and final condition of commutator and brush surfaces. (10) The insulation of the machine should be tested whilst still hot… | ||
| scan0127 | To Mr. Brock confirming a dynamo has passed tests and that future testing will be handled by his department. | ||
| View original record | X8664 To Mr. Brock. EFCL/T10.12.28. We return herewith dynamo 4.NB.HO. This machine has passed our tests and is satisfactory for handing to a customer. It is understood that the testing of this type… | ||
| scan0128 | Production test report for higher-output narrow brush dynamos. | ||
| View original record | PI and PII 56 Coil. Higher-Output Machines. (For purposes of forming a specification of test.) PRODUCTION TEST. X.0671. R.R. EAC. DYNAMO X.3781 do. (NARROWER BRUSH MACHINES) | Date. | Dynamo number. |… | ||
| scan0129 | Dynamo charging current issues and potential solutions for electrical equipment. | ||
| View original record | EFC. Hs. ) E. Da. By. ) from R. SECRET c. SG. Wor. PN. CWB. X8664 R3/M27.1.29. REC'D AT WW. 30.1.29 SS. ON G4. ELECTRICAL EQUIPMENT X.7660. X.8664. X.5653 DYNAMOS. It is understood that the only… | ||
| scan0130 | Dynamo characteristics, battery charging, and requirements for headlamp lighting and anti-dazzle mechanisms. | ||
| View original record | x 8664 PN.3/WT28.1.29. S/W. wor...from PN. Copy Sg. Copy to HS. Ox. MFC. CWD. BATTERY CHARGING RATES. We should like to know exactly how the position now stands in respect of dynamo characteristics of… | ||
| scan0131 | Improving dynamo output to support more powerful headlamps and prevent battery drain. | ||
| View original record | -2- should be quite simply arrived at by electrical or optical means. Side Lamps whilst having to conform to the law in order to give approaching vehicles an indication of the overall width of cars… | ||
| scan0132 | Development of higher output dynamos and the associated risk of battery overcharging. | ||
| View original record | W/S. To PN. from EFC. c. SG. Cx. c. CWB. Wor. X8664 EFC3/T30.1.29. DYNAMO OUTPUT. The position in respect of dynamos is that we have developed and adapted for clients' requirements in special cases… | ||
| scan0133 | Continued discussion on dynamo output limitations, potential heating issues, and the development of automatic control. | ||
| View original record | EFC3/T30.1.29. -2- Contd. give a considerably higher output than normal with the early cutting-in at the same time, and one of approximately the same weight as at present. The reason of this is that… | ||
| scan0134 | Comparison of standard and higher output dynamos, detailing charging rates and the potential risk of battery deterioration. | ||
| View original record | R. from EFC. c. E. Da. c. SG. CWB. by c. PN. Wor. x 8664 EFC-2/T1.2.29. DYNAMO OUTPUT. X5663 X4040 The higher output dynamos (20 H.P. and 40/50) as at present arranged give a very considerable… | ||
| scan0135 | Battery charging issues, dynamo output curves, and the experimental use of a green lamp indicator. | ||
| View original record | -2- Contd. Presumably owing to better batteries we have not latterly had so many complaints of overcharging with the undesirable effect that would result therefrom, and we can say that there appears… | ||
| scan0136 | Experiments with higher output dynamos and green lamp schemes on various chassis. | ||
| View original record | -3- Contd. to be necessary for the case considered above. We have running on 12-G4 a higher output dynamo in conjunction with the green lamp scheme (separate unit). This has run 5150 miles up to the… | ||
| scan0137 | Pros and cons of increasing dynamo output to meet higher electrical demands on cars. | ||
| View original record | x8864 PN.1/WTL.2.29. S/W. EFC...from PN. Copy to Sg Ox. CWB. Wer DYNAMO OUTPUT. In reply to your EFC3/T30.1.29, it would appear fairly clear that as there is a tendency always to increase the demand… | ||
| scan0138 | Performance, limitations, and potential improvements of the dynamo output. | ||
| View original record | Y8664 To R. from EFC. c. SG. CWB. c. CX. PN. c. Wor. E. EFC1/T5.2.29. DYNAMO OUTPUT. Y7660 Further to our EFC2/T1.2.29, there appears to be some anxiety on the part of Sales in regard to the output of… | ||
| scan0139 | Machine output, weight considerations, and the inclusion of a green lamp indicator. | ||
| View original record | Contd. -2- EFC1/T5.2.29. output with the same cutting in. For instance, it is estimated that in the extreme cases, with an additional 9 lbs. on the machine, making the weight 40 lbs., we could produce… | ||
| scan0140 | Dynamo output for the 'SS' Chassis, focusing on avoiding weight increase and improving electrical efficiency through various tests. | ||
| View original record | FFC. Hs. } from R. DA. T. } X8664 R2/M8.2.29. "SS" CHASSIS - DYNAMO OUTPUT. X.7660 X.8664 X.8665 X.8664 We must not add weight to this chassis, and must work hard to obtain our results by the simplest… | ||
| scan0141 | Dynamo output and recommendations for a new intermediate armature. | ||
| View original record | X 8664 BY. from EFC. EFC1/LG20.2.29. X 5663 DYNAMO OUTPUT. X 5664 X 8665 Herewith please receive copies of my report EFC2/T1.2.29. and R's memo. R2/M8.2.29, also copy of Sg4/CM7.5.28. In accordance… | ||
| scan0142 | Optimal number of slots for an intermediate output armature to reduce noise and comparing conductor sizes for different models. | ||
| View original record | [handwritten] X.8664 [/handwritten] BY. from EFC. c. to BY/RD. EFC4/LG21.2.29. INTERMEDIATE OUTPUT ARMATURE. [handwritten] x5663 [/handwritten] As referred to in our EFC1/LG20.2.29. we have now looked… | ||
| scan0143 | Comparison of armature designs, recommending a 24-slot Phantom armature for experimental construction. | ||
| View original record | contd :- -2- (1) Though the total iron armature section is somewhat less than in the 32 slot case, the copper resistance is less to a much greater extent, thus providing a better allround performance.… | ||
| scan0144 | Instructing intermediate output dynamos to resolve battery charging complaints. | ||
| View original record | BY/FD. EFC. HC. X 8664 BY8/G.4.3.29. DYNAMO OUTPUT. ----------- Referring to R2/M8.2.28. and EFC's memo (EFC4/LG. 21.2.29. and EFC2/T.1.2.29.) I consider that we should, immediately we get an… | ||
| scan0145 | Specification sheet for an armature detailing its construction and winding data. | ||
| View original record | X. 8664 ARMATURE:- 24/48/4. NO. OF SLOTS OR SECTIONS. 24 NO. OF COILS OR COMM+ BARS. 48 " " CONDUCTORS TO COMM. 96 " " CONDUCTORS 384. COILS PER SLOT 2 TURNS PER COIL 4 CONDUCTORS PER SLOT. 16 SLOT… | ||
| scan0146 | Unsuitability of the current S.S. chassis dynamo for chassis 21-EX and the need for a new machine. | ||
| View original record | X8664 RHC. from EFC. c. BY/RD. EFC4/T25.4.29. S.S. CHASSIS DYNAMO. X7660 Referring to BY/RD4/N24.4.29, we are of the opinion that the machine which we have in here and which is representative of S.S.… | ||
| scan0147 | Request to remove a higher output dynamo from chassis 12-EX for examination after 10,000 miles, with a replacement provided. | ||
| View original record | X8664 MT. Woolley from EFC. EFC3/AD4.6.29. X.8664. Higher Output Dynamo. We should be pleased if you would have dynamo H.O.1. removed from chassis 12-EX and sent to us. This machine has run over… | ||
| scan0148 | Electrical experimental record sheet for a higher-output dynamo, model H.O.1. | ||
| View original record | X 8664 ELECTRICAL EXPERIMENTAL RECORD SHEETS. Higher-output dynamo H.O.1 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. ---… | ||
| scan0149 | Examination and test report for a Higher-Output Dynamo H.O1 after a 10,000 miles test. | ||
| View original record | RR 239 (150 BKS.) (DB 461-8-12 24) MP 306975 X8664. ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Order No.: PD38 Customer's No.: Date: June 10th 1929 X8664. Examination and Test of Higher-Output Dynamo H.O1… | ||
| scan0150 | Instruction sheet detailing the results of a machine performance test after being run on a bench. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To________________________________________ 19__ Order No. PD 38 (2) Customer's No. __________ grease, made by oil getting on… | ||
| scan0151 | The production and testing of higher output dynamos for 40/50 HP and 20 HP models. | ||
| View original record | X8664 By/RD. from EFC. EFC2/AD4.7.29. X.5663 X.8664 HIGHER OUTPUT DYNAMOS. X5663. In the 40/50 HP. case it is understood that a dozen higher output machines have been instructed and made, ourselves… | ||
| scan0152 | The testing and development of higher and intermediate output dynamos for various horsepower models. | ||
| View original record | X8664 R. from EFC. c. Sg. c. E. By. EFCL/AD5.7.29. HIGHER AND INTERMEDIATE OUTPUT DYNAMOS. X8664 X8665 We have previously reported particulars and output characteristics of both 40/50 and 20 H.P.… | ||
| scan0153 | The development and testing of new 24-slot armatures designed to replace the standard 28-slot models. | ||
| View original record | -2- these have been developed with a view to their becoming the standard armatures for both chassis if they shew satisfactory performance. The present position is, that we have just received for… | ||
| scan0154 | Production and supply of higher output dynamos for various car chassis. | ||
| View original record | X8664 EFC. By/RD5/N6.7.29. Re : Higher Output Dynamos. X5663 X8664 X8665 Referring to your EFC2/AD4.7.29, we would say that we have instructed three higher output machines suitable for the 20 H.P.… | ||
| scan0155 | Requesting to swap a faulty Higher Output Dynamo (H.O.1) with a test dynamo (L) on vehicle 14-EX. | ||
| View original record | X8664 . RHC. from EFC. c. Hs/AJL. EFC7/AD6.11.29. X.8664. PHANTOM I. HIGHER OUTPUT DYNAMO H.O.1. We hand you herewith, dynamo H.O.1. the bearings of which have developed side-play and require… | ||
| scan0156 | Dynamo output and battery charging issues for 20 HP and Phantom II models. | ||
| View original record | X8664 To R. from EFC. c. Sg. c. Wor. By. c. Hs. PN. EFC3/AD28.11.29. X5663 X7660 X8664 X5661 X 5664. X 8665. DYNAMO OUTPUT 20 HP. AND PHANTOM II REF: R1/M16.11.29 and R1/M21.11.29. It is agreed that… | ||
| scan0157 | The development of intermediate output dynamos with major and minor output settings. | ||
| View original record | EFC3/AD28.11.29 contd. -2- reported. A number of these machines have been supplied to clients in special cases. They were initiated as a result of our report EFC3/T27.2.28 and your memo R5/M9.3.28. As… | ||
| scan0158 | Dynamo output options and testing for 20 HP and Phantom models. | ||
| View original record | EFC3/AD28.11.29 contd. -3- In the 20 HP. case tests so far indicate that whereas the cutting in and minor output can be suitable and as described for the Phantom case, the possible major output will… | ||
| scan0159 | Modifications to increase dynamo output for Phantom and 20 HP models. | ||
| View original record | X8664 To R. from EFC. c. Sg. c. Wor. E. c. Da. Ey. c. PN. LP. EFCL/ADLO.2.30. X.8664. X.8665. INTERMEDIATE AND HIGHER OUTPUT DYNAMOS PHANTOM AND 20 HP. X.5663. X.5664. The problem of increased dynamo… | ||
| scan0160 | Advantages of 48 coil armatures over 56 coil types and outlining future development plans for machine outputs. | ||
| View original record | EFCL/ADLO.2.30 contd. -2- The 48 coil armature of the "intermediate" output type offers certain advantages over the standard and "higher" output type 56 coil armatures from a manufacturing point of… | ||
| scan0161 | The development and testing of higher output dynamos and armatures for various chassis models. | ||
| View original record | EFCl/ADLO.2.30 contd. -3- circuit to produce higher output is now available and will be put on the 20 HP. 10,000 mile test chassis. In the 40/50 HP. case we have one 48-coil armature machine arranged… | ||
| scan0162 | Requesting particulars of a Peerless motor, specifically its brush holder and winding, and commenting on its poor efficiency. | ||
| View original record | H.R. 295A (100 T) (S.H. 159, 11-8-20) G. 2800 X.1640 To Mr. Hives from R. c. J. c. Wor. R7/P17.12.13. X.1210. X.3348 X.1640. Please give us particulars of this Peerless motor, especially with… | ||
| scan0163 | Specifications for a Peerless Starting Dynamo, detailing its components including the brush holders, armature, and field coils. | ||
| View original record | X.1640 X.121C. Peerless Starting Dynamo 6 volts. 200 amps. 1200 r.p.m. Brush Holders. Type Bosch type of two each. Brushes. Eight. Carbon & Graphite & (supposed) German Silver 1" x 1" x ½" Gear.… | ||
| scan0164 | From M. Olley detailing Mr. Royce's suggestions for forming armature windings for a self-starter motor and dynamo. | ||
| View original record | R.R. 235A (150 H) (W.W. 529. 2-7-14) G. 0670. Handwritten top: X1640 X.1395. St. Margaret's. 27. 7. 14. M. from M.Olley Copy to By. Copy to Wor. for Mr. Ellis. X.1395. Self Starter Motor & Dynamo. Jig… | ||
| scan0165 | Drawing specifications, issues with a slack tape fit, and a request for new windings for an Actuating Box. | ||
| View original record | COPY. [Handwritten: X.1397 (crossed out) X1640] 23/11/14. Mr Wormald for Mr Bailey. G.4455 Drg. states slots to be .075" + 5" square corner bottom. G.4466. Drg. states wire to be .064" - 5 The tape is… | ||
| scan0166 | The mathematical principles of armature wave windings. | ||
| View original record | E7.C EFC/L.9.10.18. X.1640. ARMATURE WINDINGS. (1) Wave Windings. Let number of conductors = n (virtual). " " poles = p Then both n and p must be even. In n ± 2 conductors there must be p steps { (+… | ||
| scan0167 | The mathematical formulas and principles for armature wave windings. | ||
| View original record | EFC/L.9.10.18. ARMATURE WINDINGS. (1) Wave Windings. Let number of conductors = n (virtual) " " " poles = p Then both n and p must be even. In n ± 2 conductors there must be p steps. (+ means… | ||
| scan0168 | Table of values for 'n' based on parameters K, p, and winding characteristics. | ||
| View original record | (2) Table of values of n:- | Value of K. | Pitch of winding. z | Sign of Winding. z | Value of p: 2. | Value of p: 4. | Value of p: 6. | Value of p: 8. | Value of p: 10. |… | ||
| scan0169 | Technical document detailing the principles and calculations for Lap Windings. | ||
| View original record | (3) (2) Lap Windings Let number of conductors = n " " " poles = p Then both n and p must be even. The forward and backward pitches z1 and z2 must both be odd, and must differ by 2. Hence the mean… | ||
| scan0170 | Example calculation for a Speedometer Magneto Armature. | ||
| View original record | R.R.' 235 A (400 T) (S.C. 536. 16-2-16) G. 1546. 64) Example 3. R.R. Speedometer Magneto Armature. n = 20, p = 2 z = 10, z₁ = 11, z₂ = 9. [Watermark] DICKINSON BOND 1804 MADE AT CROXLEY | ||
| scan0171 | Technical notes and winding specifications for Magneto & Speedometer Armatures. | ||
| View original record | Handwritten Text: X. 1640 Magneto & speedometer Armatures AA (1). Progressive lap. Pitches Forward 11 coil 5 slots Backward 9 com 4 slots Step 1 to 6 Same as Progressive wave Pitch 11 5 slots coil 6… | ||
| scan0172 | Alterations approval workflow diagram for 190-HP Aero Engine parts. | ||
| View original record | ALTERATIONS TO 190-H.P. R.R. AERO ENGINE PARTS. Form Fields: Description of Parts. Origin Experiment Test Report. Signature of Ex. Dept. that above is correct. Cost of Old Part. Cost of New Part.… | ||
| scan0173 | Alteration notice for Avro engine parts concerning retrogressive lap specifications for coils and commutators. | ||
| View original record | ALTERATIONS TO OT-H.4.9 R.R. AVRO ENGINE PARTS. (upside down text) R.R. 29 (2) HSI. I-II.6B 8.6.28. (upside down text) Description of Parts (upside down text) Origin (upside down text) Experimental… | ||
| scan0174 | Mirrored document outlining alterations to 100-HP Aero Engine Parts, including a list of approvals and a note regarding an agreement with the Admiralty. | ||
| View original record | K.R. 288A (H) & C.O. 121 (S-L.11) 4th. R.O.M. 2508. ALTERATIONS TO 100-H.P. 5 ENGINE PARTS. Top Left Box: DATE AERO ENGINE PARTS. AA Drawing No. Part list. Top Right Box: Description of Parts. Origin.… | ||
| scan0175 | Technical notes on progressive lap winding, detailing forward and backward pitches and a step sequence. | ||
| View original record | Handwritten Text: (7) (3). Progressive lap Pitches forward 9, coil 4 slots Pitches backward 7, com 3 slots Step 1 to 5. Table Columns: Up: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 Down: 10, 12, 14, 16, 18,… | ||
| scan0176 | Mirrored diagram and form detailing alterations to aero engine parts. | ||
| View original record | Header: S.M. No. K839. Index No. R.R. (B.S.I. No. 2.C.) (H & S) S.S.R. R.R. ALTERATIONS TO H-100 N.R. AERO ENGINE PARTS. Left Box: DATE AA Drawing No. Part list Main Table (Column Headers):… | ||
| scan0177 | Record of retrogressive alterations to engine part pitches and slots. | ||
| View original record | Handwritten Text: (10) 4) Retrogressive Pitches forward 7, coil 3 slots backward 9; com 4 slots. Step 1 to 4 Distribution List: Mr. BURGEX Mr. BRYLORD Mr. AUDIN Mr. DORMYSON Mr. ROACE Mr. JOHNSON… | ||
| scan0178 | Circular workflow diagram illustrating the process for engine alterations. | ||
| View original record | Top Header Text (reconstructed from mirrored and fragmented text): "so that we may ascertain whether the Admiralty will pay or Rolls-Royce will have to pay for the consequent scrap, if any. NOTE - We… | ||
| scan0179 | The specifications for a progressive cap, detailing pitches and coil/slot configurations. | ||
| View original record | (13) (5) Progressive Cap. Pitches forward 7, coil 3 slots. backward 5; coin 2 slots. Step 1 to 4 Up 1 3 5 7 9 11 13 15 17 19 Down 8 10 12 14 16 18 20 2 4 6 | ||
| scan0180 | Workflow diagram for engine part alterations, detailing steps for approval, costing, and departmental signatures. | ||
| View original record | 14 NOTE:- We have arranged with the Admiralty that they will notify us of these Engines and to them the Admiralty will pay or Rolls-Royce will have to pay the consequent scrap, if any. Mr. EVITT Mr.… | ||
| scan0181 | Hand-drawn winding diagram for an electrical component. | ||
| View original record | (1) Pole C/L Pole C/L (3) X.1640 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 + - | ||
| scan0182 | Hand-drawn winding diagram for an electrical component showing poles and connections. | ||
| View original record | (2) Pole CL Pole CL (6) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 + - | ||
| scan0183 | Hand-drawn winding diagram for an electrical armature or stator. | ||
| View original record | (3) Pole CL Pole CL (9) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 + - | ||
| scan0184 | Diagram illustrating an electrical armature winding pattern. | ||
| View original record | (4) Pole C.L. Pole C.L. (12) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 + - | ||
| scan0185 | Hand-drawn winding diagram for a commutator-type electrical machine. | ||
| View original record | (5) (15) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 + - | ||
| scan0186 | Dynamo and motor windings for the 20 HP chassis, suggesting experimental armature winding. | ||
| View original record | R. R. BDA/100 T. (S. H. 159, 11-8-20) G. 2800 X.1640 X.3534. R7/G24.3.19. To EFC. from R. c. to CJ. ________________________________________________ X.3533 RE DYNAMO & MOTOR FOR 20 HP. CHASSIS X.1640.… | ||
| scan0187 | Hand-drawn diagram illustrating a normal lap winding for an electrical component. | ||
| View original record | R.R. 235A (500 H) (S.A. 353. 4-3-15) G. 0970. Lap winding (normal) n = 36, p = 4 y1 = 9, y2 = 7 Diagram Numbers: 1, 2, 3, 4, 5, 6, 8, 9, 10, 20 Symbols: +, - X1640 | ||
| scan0188 | Hand-drawn diagram illustrating a lap winding (short chord) electrical configuration. | ||
| View original record | R.R. 235A (300 H) (S.A. 353. 4-3-15) G. 0970. n = 36 p = 4 y1 = ?, y2 = 9. Lap winding (Short chord) C O I X . | ||
| scan0189 | The 20 HP starter motor and dynamo, detailing the dispatch of drawings and models. | ||
| View original record | R.R. F'm A (100 T) (S.H. T. & G. 2800) To Da. from E. c. to EFC. c. to EH. c. to CJ. X.1640 E5/G9.4.19. X.3533 20 H.P. STARTER MOTOR AND DYNAMO. X.1640. X.3534. X.3331. We send you herewith drawing… | ||
| scan0190 | Hand-drawn winding diagram for a 4-pole, 4-circuit wave-wound armature. | ||
| View original record | Up Down 1 8 15 22 5 12 19 2 9 16 23 6 13 20 3 10 17 24 7 14 21 4 11 18 4 pole 4 circuit wave wound armature n = 24 p = 4 y = (n+4)/4 = 7 k = 3. | ||
| scan0191 | Hand-drawn winding diagram for a 45 slot armature. | ||
| View original record | Up ☉ Down ⊗ to +ve brush. X.1640 1/45/45 N S +ve -ve Numbers on diagram: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34,… | ||
| scan0192 | Hand-drawn winding diagram for a 24-slot armature. | ||
| View original record | Top left text: 2 | 24 / 48 Top right text: X. 1640 Top note: Yd Down ⊗ to positive brush Bottom title: WINDING DIAGRAM OF 24 SLOT ARMATURE Diagram labels: - Magnetic Poles: N (top and bottom), S (left… | ||
| scan0193 | List of electrical apparatus models required for Mr. Royce's inspection. | ||
| View original record | X.1640 R.R. 235A (100 T) (S.H. 159, 11-8-20) G 2800 To Da. from EFC. c. to Bn. c. to RHC. X.3534 X.3533 X.3618 X.3573. RE MODELS REQUIRED FOR MR. ROYCE. X.1640. X.2945. We give below for your… | ||
| scan0194 | Comparative table of specifications for armature windings in S.S. motors. | ||
| View original record | X.1640 TABLE OF ARMATURE WINDINGS ( S.S. MOTORS ) Machine. | R.R.45A. | R.R.17. | R.R. 24 | Lucas Ad.B10. | C.A.V. | Bosch. | Bijur. (6 volt) ---|---|---|---|---|---|---|--- Number of poles (even) (p)… | ||
| scan0195 | Comparison table of armature windings for S.S. Motors. | ||
| View original record | -2- TABLE OF ARMATURE WINDINGS ( S.S. MOTOR) (Contd) Machine. | R.R.45A. | R.R.17 | R.R.24 | Lucas A.510 | C.A.V. | Bosch. | Bijur 6 volt. ---|---|---|---|---|---|---|--- step. Winding pitch in slots.… | ||
| scan0196 | Table of specifications for armature windings for various dynamos. | ||
| View original record | X 1640 29.9.19. TABLE OF ARMATURE WINDINGS (DYNAMOS) Machine | C.A.V.N.C.R.R. | Lucas E.575. | Smith(T & M) A. | Bijur. | Liberty. | R.R.20 HP. | Lucas A.400. | Smith T & M 24. Number of poles (even)… | ||
| scan0197 | Table of armature windings and technical specifications for various dynamos. | ||
| View original record | -2- 29.9.19. TABLE OF ARMATURE WINDINGS( DYNAMOS) Contd. | Machine. | C.A.V.N.G.R.R. | Lucas E.575. | Smith T & M.A. | Bliur. | Liberty. | R.R. 20 HP | Lucas A.400. | Smith T & M 3A |… | ||
| scan0198 | Specifications table for armature windings of various S.S. motors. | ||
| View original record | X.1640 x.523 x.8843 29.9.19. TABLE OF ARMATURE WINDINGS (S.S. MOTORS) Machine: R.R.45A., R.R.17., R.R.24, Lucas A.S10., C.A.V., Bosch., Bliur (6 Volt)., R.R.45B. Number of poles (even) (p): 4, 4, 4,… | ||
| scan0199 | Continuation of a comparative table of armature winding specifications for various S.S. motors. | ||
| View original record | -2- TABLE ARMATURE WINDINGS (S.S. MOTOR) (CONTD) | Machine. | R.R. 45A. | R.R. 17. | R.R. 24 | Lucas A.510. | C.A.V. | Bosch. | Bijur 6 volts. | R.R. 45B. | |---|---|---|---|---|---|---|---|---| |… | ||
| scan0200 | Comparison table of specifications for various S. Motors (starter motors). | ||
| View original record | -3- TABLE (S.Motors) | Machine | R-R 45a. | R-R17. | R-R24. | Lucas A510. | C.A.V. | Bosch. | Bijur. 6 volts. | R-R4B | |---|---|---|---|---|---|---|---|---| | FIELD WINDING: | | | | | | | | | |… | ||
| scan0201 | Extract detailing Mr. Bentley's views on the use of steel versus phosphor bronze for armature binding wires. | ||
| View original record | R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X.1640 Extract fromBY/Btnl/P22.11.19. BY/Btnl/P22.11.19. Contd. Mr Bentley 3. Armature Binding Wires. He is very much opposed to the use of binding… | ||
| scan0202 | Internal memorandum regarding the progress of the Goshawk Dynamo & Motor. | ||
| View original record | X164 D To R. from Ck. c. to CJ. c. to E. c. to Da. c. to Bn. c. to Hs. Ck3/T20.2.20. X.3533. X.3534. - GOSHAWK DYNAMO & MOTOR. X.1640. In answer to Mr. Elliott's note E3/G18.2.20. all the mechanical… | ||
| scan0203 | Specifications for building two dynamos using parts from a starter motor. | ||
| View original record | X.1640 To Ck. from R. c. to CJ. X.294. c. to Bn. X.3526. RE DYNAMOS. X.1640. R6/G22.3.20. Referring to your visit here last week you will remember that we came to the conclusion that it was worth… | ||
| scan0204 | Page two of a document detailing specifications for armature winding, including coils, wiring, insulation and assembly. | ||
| View original record | Contd. -2- RG/G22.3.20. In the other case the armature would be wound with 37 coils of eight turns, being wide enough for two wires side by side, and eight wires deep, 16 wires per slot. The grooving… | ||
| scan0205 | Report discussing the testing and development of dynamos with wavewinding and trembler control. | ||
| View original record | Contd. -3- R6/G22.3.20. which would form another helical layer, and permit of the coils being conveniently connected up as wavewinding. The dynamos would be tested with high resistance graphite carbon… | ||
| scan0206 | Specifications for building an experimental dynamotor for a 40/50 HP chassis from starter motor parts. | ||
| View original record | X.1640 To Da. from EFC. c. to En. c. to Hs. c. to Mr. Coverley. EFC4/T23.3.20. X.3526 - R.R. EXPERIMENTAL DYNAMOTOR 40/50 H.P. CHASSIS MADE FROM STARTER MOTOR PARTS. X.1640 It is decided that we build… | ||
| scan0207 | Specifications for an armature and field winding, detailing slot dimensions, wire gauges, and air gap. | ||
| View original record | Contd. -2- EFC4/T23.3.20. (2) This armature will be cut with 45 slots of narrower and deeper section than the previous. The winding for this is to consist of 540 conductors of No.19 S.W.G. D.C.C.… | ||
| scan0208 | Design specifications and experimental aims for a plain shunt wound machine with vibrator control. | ||
| View original record | Contd. -3- EFC4/T23.3.20. It will be understood that the machine is intended to be a plain shunt wound machine and ultimately intended to be used with vibrator control. What we want to find out at the… | ||
| scan0209 | Suggestive diagram showing the material composition and dimensions for a 37-slot armature dynamo. | ||
| View original record | X 3526 EXP_L R.R. DYNAMO Diagram Labels: Banding Wire .020" Clearance .010" Mica .010" Manilla paper .010" Cotton Tape .005" Manilla paper .010" D.C.C. .005" Copper .040" Width Calculation: Width… | ||
| scan0210 | Diagram with dimensions for a slot in a 45-slot armature for an experimental dynamo. | ||
| View original record | X.3526. EXPt R.R. DYNAMO Width Manilla .020 Tape .010 Insulated conductor .050 Total .080 Depth Clearance .010" Mica .010 Banding .020 Manilla .040 Cotton tape .020 Conductors .600" Total .700"… | ||
| scan0211 | Internal request for particulars, illustrations, and models of armature windings for small dynamos and motors used on cars. | ||
| View original record | X.1640 2 To EFC. from R. Copy to CJ. R5/G7.5.20. 40 X.1623. RE SMALL DYNAMOS AND MOTORS. (Struck through) X.294 (Struck through) X.543 Would you kindly provide us at some time with such particulars as… | ||
| scan0212 | Armature winding specifications for a Bosch lighting dynamo presented in tabular form with a diagram. | ||
| View original record | X 1640 ARMATURE WINDING OF BOSCH LIGHTING DYNAMO IN TABULAR FORM Numbers refer to numbered conductors or groups of three conductors on winding diagrams. UP conductor | Conductor pitch | DOWN conductor… | ||
| scan0213 | Simplified winding diagram for a Bosch lighting dynamo armature. | ||
| View original record | SIMPLIFIED WINDING DIAGRAM OF BOSCH LIGHTING DYNAMO ARMATURE. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 + - C.A.P. / 22.12.11 | ||
| scan0214 | Winding diagram of a Bosch Lighting Dynamo Armature. | ||
| View original record | WINDING DIAGRAM OF BOSCH LIGHTING DYNAMO ARMATURE + - | ||
| scan0215 | Investigation of a Rotax dynamo's winding scheme and field circuit resistance. | ||
| View original record | X1640 To EFC. from R. c. to CJ. c. to Hs. R5/G1.4.21. X.1005 - RE ROTAX DYNAMO. X.1640. I shall be glad if you will go on with the investigations of the Rotax dynamo. Assuming that it is a four-pole… | ||
| scan0216 | The investigation of a Rotax Dynamo Armature winding. | ||
| View original record | X1640 To R. from EFC. c. CJ c. PN c. Da. c. By. EFC3/T16.4.21. X.1005 - ROTAX DYNAMO ARMATURE. X.1640. We have now investigated the winding of this armature which has been possible merely by removing… | ||
| scan0217 | Technical note detailing the principles and formulas for wave winding of uniform slot pitch in armatures. | ||
| View original record | X 1640 X.1640 - ARMATURE WINDINGS. (3) WAVE WINDING OF UNIFORM SLOT PITCH. Number of conductors = n (virtual) " " poles = p Both n and p are even. Winding is preferably retrogressive. So in n - 2… | ||
| scan0218 | Instructions for modifications to a dynamo armature for the 40/50 chassis, based on a visit with Mr. Royce. | ||
| View original record | To Ds. from EFC. c. By. c. De/Thr. c. Ey/WHR. c. HIC. X.3526 - R.H. EXPL. DYNAMO FOR 40/50 CHASSIS MADE FROM STARTER MOTOR PARTS. Our visit to Mr. Royce has resulted in modifications of the previous… | ||
| scan0219 | Continued memorandum on dynamo and starter motor winding diagrams and a decision by Mr. Royce on machine configuration. | ||
| View original record | Contd. -2- EFC1/T30.5.21. possible. It is noticed, referring to the winding diagrams which have been previously issued, e.g. E.13768 for the standard E.R. starter motor, D.1506 and D.1512 for the… | ||
| scan0220 | Mr. Royce's remarks on the manufacture of dynamos and starter motors. | ||
| View original record | To Da. from EFC. c. By c. Da/Thr. c. By/WER. X. 1640 EFC2/T2.8.21. X.294- DYNAMOS & MOTORS MANUFACTURED BY R.R. X.1640 X.543. During my visit to Mr. Royce he made a number of general remarks in… | ||
| scan0221 | Mr. Royce's instructions on dynamo and motor armature specifications for four-pole machines. | ||
| View original record | C.ntd. -2- EFC2/12.6.21. commutator spokes. He has instructed that in all cases of four pole machines a number of the form 4 m + 1 shall be adopted for the number of slots, and equal slot pitches,… | ||
| scan0222 | Winding table for a Rotax AT.12 Dynamo with numbered conductors. | ||
| View original record | X. 1640. 17.6.21. X.1005 - WINDING TABLE OF ROTAX AT.12 DYNAMO IN NUMBERED CONDUCTORS. X.1640. Up. Down. Pitch at com: end. Up Down. Pitch at com: end. 9 22 13 com. 35 48 16 8 51 12 7 20 13 33 46 18 5… | ||
| scan0223 | Request to create a dummy wooden armature for the 'Coshawk II' motor and dynamo. | ||
| View original record | x1640 To EY. from DA/T. DA/T1/G10.8.21. c. to Hs. c. to EFC. X.4383. RE "COSHAWK II" MOTOR AND DYNAMO X.1640. X.4384. Would you please issue the necessary information to the experimental dept. to… | ||
| scan0224 | Instructions for producing two dummy model armatures for the 'GOSHAWK II' dynamo and S. Motor. | ||
| View original record | X1640 To Ex. Office. BY/WER2/EF17.8.21. H3 X.3283. "GOSHAWK II" - R.R. DESIGN OF DYNAMO X.4384. & S. MOTOR. X.1640 We are issuing instructions for producing 2 dummy model armatures, one for each of… | ||
| scan0225 | Experiments with three different armature designs to achieve a silent dynamo. | ||
| View original record | To EFC. from R. c. to CJ. c. to PN. c. to Hss c. to Mr. Bentley. c. to Mr. Hulley. X.294 - RE DYNAMOS. X.1640. Regarding the silent dynamos, you will remember that some time ago we obtained some sort… | ||
| scan0226 | Page 2 of a document detailing calculations for the armature of a four-pole machine. | ||
| View original record | R R. 285B (100 T) (S.H. 798.10-12-20) G. 2948 Contd. -2- R1/G10.10.21. sections fulfil the ordinary conditions of the calculations, the number of slots in the armature for a four-pole machine should… | ||
| scan0227 | Providing feedback and suggesting modifications for dynamo and motor armature windings. | ||
| View original record | To Mr. Brock from R. c. to CJ. c. to EFC. c. to Hs. X1640 R7/G10.10.21. X.4383. RE DYNAMO AND MOTOR ARMATURE WINDINGS X.1640. X.4384. Speaking generally, I am very pleased with the specimen windings.… | ||
| scan0228 | Recommendation to prevent winding failure by banding it nearer the armature core. | ||
| View original record | Contd. -2- R7/Glo.10.21. the end of the winding are liable to creep along and come off, possibly some extra precaution can be taken to prevent the possibility of this happening (which would mean a… | ||
| scan0229 | Note regarding dynamo and motor armature windings for the Goshawk model. | ||
| View original record | X.1640 To By. from EFC. EFC1/T13.10.21. X.4383. X.4384. RE DYNAMO AND MOTOR ARMATURE WINDINGS. X1640 Herewith please receive two copies of a note received from Mr. Royce with reference to the model… | ||
| scan0230 | Page of calculations to determine the best depth of a slot in an armature. | ||
| View original record | X. 1640 BEST DEPTH OF SLOT IN ARMATURE Armature dia. = D Depth of slot = h No. of slots = n Total area = A Area per slot = a Width of slot = w Pitch at bottom of slot = p a = A/n, w = A/nh p = (π(D -… | ||
| scan0231 | Following up on the results of a comparative trial of three dynamo armatures for a lighting set. | ||
| View original record | X1640 To E. from EFC. EFC2/T1.1.25. RE DYNAMO. X1640 V3362 About three years ago we received a memo from R. copy of which is attached, regarding a dynamo for the W.W. lighting set. but we have never… | ||
| scan0232 | Noise issues with a lighting dynamo, caused by vibration from laminated pole pieces. | ||
| View original record | To EFC. from E. c. to CJ. X1640 E2/M3.1.25. RE LIGHTING DYNAMO AT WW. X.3362. X.1640. X.294. In response to your query concerning the above, I have no information regarding three armatures for this… | ||
| scan0233 | Request to prepare simple drawings for various dynamo and motor armature slots. | ||
| View original record | X1640 To BY/RD. from EFC. EFC1/T22.5.25. RE DYNAMO AND MOTOR ARMATURE SLOTS Would you kindly have prepared for this Dept. two simple drawings, one for dynamos and one for motors, showing one armature… | ||
| scan0234 | Accompanying a blueprint for Dynamo and Starter Motor Armature Slots. | ||
| View original record | A X1640 To EFC. BY/RD3/ML9.6.25 . RE SLOT SECTIONS. Please receive herewith one blueprint of D.70974/5 - Dynamo and Starter Motor Armature Slots, in accordance with your request. BY/RD. | ||
| scan0235 | Index list of winding diagrams for various dynamos and motors with their corresponding drawing numbers. | ||
| View original record | X1640 1.1.27. X.1640. WINDING DIAGRAMS. Dynamos:- 20 HP. 29 slot & coil. D.50026. 20 HP. 29 slot & 57 coil (Rectangular)diagram). D.51115. Std. 20 HP. 19 slot & 57 coil. D.51372. 20 HP. 28 slot & 56… | ||
| scan0236 | Statement concerning the adoption of an armature having 28 slots and 56 coils to make a dynamo quieter. | ||
| View original record | Y1640 18.1.27. X.1640. STATEMENT CONCERNING THE ADOPTION OF ARMATURE HAVING 28 SLOTS AND 56 COILS; X.8672. ONE OF THE COILS BEING A LAP COIL. Our present armature has 29 slots and 57 segments. In… | ||
| scan0237 | Continued page detailing calculations for conductor pitch and commutator connections. | ||
| View original record | -2- Contd. With an equal conductor pitch, each pitch would be 27. This will not do, however, as, owing to the use of two coils per slot, the coils would not be in the correct positions in relation to… | ||
| scan0238 | Statement on adopting an armature with 28 slots and 56 coils, with one coil being a lap coil. | ||
| View original record | X1640 18.1.27. X.1640. STATEMENT CONCERNING THE ADOPTION OF X.8672. ARMATURE HAVING 28 SLOTS AND 56 COILS; ONE OF THE COILS BEING A LAP COIL. Our present armature has 29 slots and 57 segments. In… | ||
| scan0239 | Calculation and explanation for conductor pitch, coils per slot, and commutator connections. | ||
| View original record | -2- Contd. With an equal conductor pitch, each pitch would be 27. This will not do, however, as, owing to the use of two coils per slot, the coils would not be in the correct positions in relation to… | ||
| scan0240 | Winding table for 20 HP or 40/50 HP armatures. | ||
| View original record | X.1640 11.4.29. WINDING TABLE. 20 H.P. OR 40/50 H.P. ARMATURES. 28/56/4. COM. BARS. | CONDUCTORS. | COM. BARS. | CONDUCTORS. | COM. BARS. 1 | 1 26 | 2 | 55 80 | 3 | 109 24 | 4 | 53 78 | 5 | 107 22 | 6… | ||
| scan0241 | Winding table for 20 HP or 40/50 HP armatures. | ||
| View original record | X1640 11.4.29. WINDING TABLE. 20 H.P. OR 40/50 H.P. ARMATURES. 28/56/4. COM. BARS. | CONDUCTORS. | COM. BARS. | CONDUCTORS. | COM. BARS.… | ||
| scan0242 | The rule for armature polarity. | ||
| View original record | X1640 23.3.28. RULE FOR ARMATURE POLARITY. In a R etrogressive winding with L eft hand rotation we get a M inus brush under the N orth field pole. Rule. R. LMN. Any twoe of the above can be changed… | ||
| scan0243 | Index of winding diagrams for various dynamos and motors. | ||
| View original record | X.1640 27.5.29. X.1640. WINDING DIAGRAMS. Dynamos :- 20 HP. 29 slot & coil. (circular) D50026 20 HP. 29 slot & 57 coil (rectangular) D51115 Std. 20 HP. 19 slot & 57 coil (circular) D51372 20 HP. 28… | ||
| scan0244 | Note regarding armatures for 20 HP dynamos to achieve higher output. | ||
| View original record | 5663 RR 68 (250T) (DB 925 8-5-25) J.H.D. armature, 20 HP. Dynamos to give higher output. | ||
| scan0245 | Customer complaints about insufficient dynamo output at high speeds during long night journeys. | ||
| View original record | To R. from EFC. c. BJ. E. c. BY. PN. c. Hm. Wor. X5663 EFC3/T27.2.28. X.8660 X.8664. X.5663. INSUFFICIENT DYNAMO OUTPUT AT HIGH SPEEDS. We have had several complaints (four, I think) all comparatively… | ||
| scan0246 | Modifying a dynamo with different windings to handle high-consumption headlamps without overheating. | ||
| View original record | Contd. -2- EFC3/T27.2.28. to Barcelona using very big consumption head lamps. A dynamo of our present size which would be capable of covering such a night load at high speeds would be entirely… | ||
| scan0247 | Technical memorandum discussing insufficient dynamo output and potential solutions for the 20 HP & 40/50 HP models. | ||
| View original record | EFC. } from R. Hs. } Le Canadel. E. } c. BJ. Wor. PN. C. BY. CWB. SG. X 5663 R5/M9.3.28. REC'D & DESPATCHED FROM WW.13.3.28. 20 HP. & 40/50 H.P. INSUFFICIENT DYNAMO OUTPUT. X8664 X8780 Our dynamo is… | ||
| scan0248 | The specifications for an experimental 20 HP dynamo armature for larger output. | ||
| View original record | X5663 To BY. from EFC. c. BY/RD. EFC4/T28.3.28. 20 H.P. DYNAMO ARMATURE FOR LARGER OUTPUT WITH HIGHER CUTTING IN SPEED. Will you please have instructed experimental an armature for the 20 H.P. dynamo… | ||
| scan0249 | Continued memo regarding testing a higher output dynamo armature and the potential for further orders. | ||
| View original record | EFC4/T28.3.28. -2- Contd. Should the armature turn out to give a satisfactory result in one of these machines, and should there be customers who are requiring this higher output dynamo on their 20 's,… | ||
| scan0250 | Table of various proposals for a 20 HP dynamo for higher output armature. | ||
| View original record | X5663 28.3.28. TABLE OF VARIOUS PROPOSALS FOR 20 H.P. DYNAMO. FOR HIGHER OUTPUT ARMATURE. 29 28 26 24 No. of slots. Winding 1 Dummy One stage short No or two One stage short (all retro.wave) coil.… | ||
| scan0251 | Notes on modifying 20 HP and 40/50 HP dynamos for greater output and a higher cutting-in speed. | ||
| View original record | X5663 28.3.28. 20 H.P. AND 40/50 H.P. DYNAMOS FOR GREATER OUTPUT AND HIGHER CUTTING IN SPEED. X.5663 X.8664. A 28 slot half paralleled 20 H.P. armature was tried. The cutting in speed at 80°C (14… | ||
| scan0252 | Page of calculations for component dimensions, including slot width and neck depth. | ||
| View original record | -2- Contd. Increased width of slot = .016" New " = .166" On depth of slot we save 2 x .048 = .096" and spend 6 x .008 = .048" i.e. depth of slot is less by .048" and will therefore be .487". Slot is… | ||
| scan0253 | Proposal document detailing calculations for the number of slots and chording for a 20 HP armature. | ||
| View original record | -3- Contd. This is less than before whereas we want more. Therefore we suggest 26 or 24 slots each .166 x .487" Oce at neck = 7.07" in each case. 1/26 of this = .272 Slot = .166 Neck = .106 1/24 of… | ||
| scan0254 | Calculations and suggestions for a 40/50 case armature with a modified number of slots and wire diameter. | ||
| View original record | -4- Contd. 40/50 Case. Suggest first a 28 slot armature with three turns per coil instead of four. Since the area of C.S. of conductor is to be increased in the ratio of 4/3, the wire diameter will be… | ||
| scan0255 | Page with calculations and specifications for electrical component slots and windings. | ||
| View original record | -5- Contd. This is too small compared with previous neck of .102" Hence we adopt 26 slots each .186 by .536. Cce at neck = 7.67" 1/26 of this = .295" Slot = .186" Neck = .109" which is slightly better… | ||
| scan0256 | Experiments to improve dynamo output at high speeds by altering armature windings. | ||
| View original record | X5663 6 To R. from EFC. c. BJ. R. DA. c. BY. FH. Wor. EFC4/T30.3.28. INSUFFICIENT DYNAMO OUTPUT AT HIGH SPEEDS. (Refs. EFC3/T27.2.28 and R5/M9.3.28). X8780 X8664 It appears difficult to prevent… | ||
| scan0257 | Instructions to create a higher output dynamo by swapping parts between two 20 HP machines. | ||
| View original record | RHC. from EFC. X.5663 EFC4/T12.4.28. SPECIALLY ARRANGED DYNAMO FOR HIGHER OUTPUT AT THE HIGHER SPEEDS. Herewith we hand to you two 20 H.P. machines Nos.288 and 931. Will you please have the 57 slot… | ||
| scan0258 | Specification sheet detailing the particulars of 26 slot dynamo armature windings for 20 HP and 40/50 HP models. | ||
| View original record | X5863 14.4.28 PARTICULARS OF 26 SLOT DYNAMO ARMATURE WINDINGS. X1664 20 H.P. 40/50 H.P. Type of winding. Ret. wave. Ret. wave. No. of slots. 26 26 No. of conductors. 312 312 Conductors/slot. 12 12… | ||
| scan0259 | Proposed design changes for car dynamos to improve output and efficiency. | ||
| View original record | X5663 EFC. ) FROM R. HS. } (At Le Canadel) EY. ) c. to BJ. Wor. E. DA. C. SG. R2/M18.4.28. CAR DYNAMOS. OUTPUT. X.8664. X.8663. I think there is little doubt that we ought not to alter the size of the… | ||
| scan0260 | Responding to an enquiry about a delay in the work on two 26 slot armatures. | ||
| View original record | X5663 EFC. 20.4.28. In reply to an enquiry, Mr. Davis stated that owing to pressure of other work he has been unable to make any progress with the work on the two 26 slot armatures. He could only say… | ||
| scan0261 | Modifications to dynamo armatures for augmented output at higher speeds. | ||
| View original record | X5663 To BY. from EFC. c. BY/RD. EFC1/T23.4.28. DYNAMO FOR AUGMENTED OUTPUT AT THE HIGHER SPEEDS. X8664 With reference to our notes EFC4/T28.3.28 and EFC3/T28.3.28 dealing respectively with 26 slot… | ||
| scan0262 | Modifications to a dynamo's armature and pole pieces to alter its output. | ||
| View original record | To R. from EFC. c. BJ. E. c. Da. Ry. c. Wor. C. c. SG. X5663 EFC2/T23.4.28. DYNAMO OUTPUT. X8664 Your ref. R2/M18.4.28. We are giving good attention to the matter of a dynamo for a less falling output… | ||
| scan0263 | Instructions for modifying 40/50 and 20 HP dynamo armatures for greater output at higher speeds. | ||
| View original record | To BY. from EFC. c. BY/RD. X5663 EFCF/T25.4.28. 40/50 and 20 H.P. DYNAMO ARMATURES FOR GREATER OUTPUT AT HIGHER SPEEDS. X8664 Further to our EFCF/T23.4.28, we now confirm that 40/50 and 20 H.P.… | ||
| scan0264 | Requirements for Phantom dynamo armatures. | ||
| View original record | EFC. FROM R. Copy to BJ. HS. BY. X5663 R5/M25.4.28. PHANTOM DYNAMO - 2 ARMATURES FOR DIFFERENT SPEED & OUTPUT. X5663 X8664 Referring to your EFC2/T23428, I am not very particular whether you have 26… | ||
| scan0265 | Modifying 20 HP and 40/50 HP dynamos for greater output and higher cutting in speed. | ||
| View original record | X5663 4.5.28. 20 H.P. AND 40/50 H.P. DYNAMOS FOR GREATER OUTPUT AND HIGHER CUTTING IN SPEED. X8664 A 28 slot half paralleled 20 H.P. armature was tried. The cutting in speed at 80°C. (14 volts) was… | ||
| scan0266 | Series of calculations comparing present and new dimensions for a component's slot and neck. | ||
| View original record | -2- Contd. Increased width of slot = .016" ✓ New " " = .166" ✓ On depth of slot we save ✓ 2 x .048" = .096" and spend 6 x .008 = .048" ✓ i.e. depth of slot is less by .048" ✓ and will therefore be… | ||
| scan0267 | Calculations for redesigning a 28 slot armature for a 40/50 case, including coil turns and wire dimensions. | ||
| View original record | -3- 40/50 Case.. Suggest first a 28 slot armature with three turns per coil instead of four. Since the area of C.S. of conductor is to be increased in the ratio of 4/3, the wire diameter will be… | ||
| scan0268 | Request to create a higher output dynamo armature for a 20 HP chassis by using thicker wire. | ||
| View original record | X5663 To RHC. C. EFC. BY/RD7/MT.9.5.28. RE 20 H.P. CHASSIS - DYNAMO ARMATURE - SEC:8070. R2/M.18.4.28. Will you please put in hand one armature to the prints sent herewith, this is arranged to give a… | ||
| scan0269 | Customer demand for higher output dynamos and solutions for high-speed overcharging. | ||
| View original record | X5663 To RHC. from EFC. c. EY. BY/RD. EFEL/T23.6.28. X5664 We are constantly receiving enquiries for higher output dynamos for customers, some of which we have met partially by machines which have… | ||
| scan0270 | Instructions and test results for a 20hp Dynamo M with modified armature coils. | ||
| View original record | RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 X 5663 ROLLS-ROYCE LTD. INSTRUCTIONS. To C.F.C. Order No. A.D. 9. Customer's No. X 5663. 10. July 1928 20hp Dynamo M with 3-turn Armature Coils This… | ||
| scan0271 | Instructions on the performance of a machine and its fitting to a 20 HP 'India' chassis. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8 12.24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To__________________19 Order No._____________ Customer's No. 2 When cold, with the same setting the machine put up 12.4… | ||
| scan0272 | Experimental test report on a 20 HP dynamo modified with a coarser gauge armature to achieve higher output. | ||
| View original record | To R. from EFC. c. BJ. E. c. By. X5663 EFC5/T11.7.28. X5663 20 H.P. DYNAMO WITH COARSER GAUGE ARMATURE FOR HIGHER OUTPUT. We have now experimentally tested and handed over for fitting to the 20 H.P.… | ||
| scan0273 | The temperature and performance testing of a commutator and brushes, noting satisfactory operation and the planned receipt of a Phantom dynamo armature. | ||
| View original record | Contd. -2- the carcase as measured by a thermometer in our usual way. That is to say, the commutator and brushes would be relatively hotter in relation to the carcase in this case than in the standard… | ||
| scan0274 | The testing and proposed production of higher output armatures for 20 HP and 40/50 HP dynamos. | ||
| View original record | To BY/Cgh. from EFC. X5663 X5663 20 H.P. & 40/50 H.P. HIGHER OUTPUT X8664 ARMATURES As reported in our EFC5/T11.7.28, we received a 20 H.P. dynamo with higher output armature upon which we have done a… | ||
| scan0275 | Attaching a blueprint showing the output curve for a 20 HP dynamo modified with a coarser gauge armature. | ||
| View original record | X5663 To R. from EFC. c. BJ. E. BY. EFC1/T16.7.28. 20 H.P. DYNAMO WITH COARSER GAUGE ARMATURE FOR HIGHER OUTPUT. Further to our EFC5/T11.7.28, we now attach blue print shewing curve of output of the… | ||
| scan0277 | Fitting and performance of a 20 HP dynamo with a higher output armature on an 'India' chassis. | ||
| View original record | X5663 To R. from EFC. c.c. BJ EFC1/T25.7.28. 20 H.P. DYNAMO ARMATURE OF HIGHER OUTPUT. X.4040 As previously reported it has been arranged for the 20 H.P. dynamo with coarser higher output armature to… | ||
| scan0278 | Accompanying a preliminary production specification and test for a 20 HP Dynamo with a higher output armature. | ||
| View original record | X 5663 To EY. from EFC. c. SFT/Mr.Brock. EFC6/T15.11.28. 20 H.P. DYNAMO WITH HIGHER OUTPUT ARMATURE. Herewith please receive acopy of Production Specification & Test for the above. Will you please… | ||
| scan0279 | Specification for the inspection and test of a 20 HP Dynamo with a higher output armature. | ||
| View original record | Preliminary specification - subject to modification. EFCL/T15.11.28. X.5781da. R.R. 20 H.P. DYNAMO WITH HIGHER OUTPUT ARMATURE. X.5663. SPECIFICATION OF INSPECTION & TEST. Important note:- Applicable… | ||
| scan0280 | Test and bedding procedure for dynamo brushes. | ||
| View original record | -2- Contd. (f) The initial bedding of the brush shews partial contact reasonably well distributed over the working surface. (Preliminary bedding of brushes). (2) The insulation resistance of the… | ||
| scan0281 | Page 3 of a continued document outlining testing procedures for a dynamo. | ||
| View original record | -3- Contd. P.D., which output should lie between 15 and 16 amperes. (6) With the dynamo still in the same hot condition, it should be verified that running on open circuit shows a voltage of at least… | ||
| scan0282 | Dynamo charging current issues and potential improvements. | ||
| View original record | X5663 EFC. Hs. } from R. SECRET E. Da. By. } c. SG. Mor. PN. CME. R3/427.1.29. REC'D AT WW. 30.1.29 SS. ON G4. ELECTRICAL EQUIPMENT X.7660. X.8664. X.5663 DYNAMOS. It is understood that the only… | ||
| scan0283 | Performance of higher output dynamos and the risk of premature battery deterioration. | ||
| View original record | R. from EFC. c. E. Da. c. SG. CWB. c. PN. Wor. X5663 (handwritten, crossed out) EFC-2/T1.2.29. DYNAMO OUTPUT. X5663 (handwritten) X5664 (handwritten, crossed out) X4040 (handwritten) The higher output… | ||
| scan0284 | Battery overcharging, dynamo output curves, and the potential use of a green lamp charge indicator. | ||
| View original record | -2- Contd. Presumably owing to better batteries we have not latterly had so many complaints of overcharging with the undesirable effect that would result therefrom, and we can say that there appears… | ||
| scan0285 | Experiments with higher output dynamos and green lamp schemes on various chassis. | ||
| View original record | -3- Contd. to be necessary for the case considered above. We have running on 12-G4 a higher output dynamo in conjunction with the green lamp scheme (separate unit). This has run 5150 miles up to the… | ||
| scan0286 | Dynamo output optimization and weight reduction for the 'SS' chassis. | ||
| View original record | EFC. Hs. } From R. Da. E. } X5663 R2/M8.2.29. "SS" CHASSIS - DYNAMO OUTPUT. X.7660. X.8664. X.5663 X.8665. X.5664. We must not add weight to this chassis, and must work hard to obtain our results by… | ||
| scan0287 | Dynamo output and recommendations for an intermediate armature. | ||
| View original record | X.5662 BY. from EFC. EFC1/LG20. 2. 29. X5664 X8665 DYNAMO OUTPUT. X.5663 X.8664 Herewith please receive copies of my report EFC2/T1. 2. 29, and R's memo. R2/M8. 2. 29, also copy of Sg4/CM7. 5. 28. In… | ||
| scan0288 | Comparing different armature slot configurations to reduce noise for Phantom and 20 HP models. | ||
| View original record | X5663 BY. from EFC. c. to BY/RD. EFC4/LG21.2.29. X.5664 INTERMEDIATE OUTPUT ARMATURE. X.5663 As referred to in our EFC1/LG20.2.29 we have now looked closely into the matter of an intermediate output… | ||
| scan0289 | Recommendation to experimentally build a 24-slot Phantom armature, detailing its specifications and comparing it to previous designs. | ||
| View original record | Contd. -2- EFC4/LG21.2.29. (1) Though the total iron armature section is somewhat less than in the 32 slot case, the copper resistance is less to a much greater extent, thus providing a better alround… | ||
| scan0290 | Specifications for an armature, detailing slots, coils, conductors, pitch, and angles. | ||
| View original record | X 5663 ✓ May '29. ARMATURE:- 28/56/4. NO. OF SLOTS OR COIL FORMATIONS 28 NO. OF COIL OR COMM. BARS 56 " " CONDUCTORS TO COMM. 112 " " CONDUCTORS. 448 COILS PER SLOT. 2 TURNS PER COIL. 4 CONDUCTORS PER… | ||
| scan0291 | The production and testing status of higher output dynamos for 40/50 HP and 20 HP models. | ||
| View original record | X5663 By/RD. from EFC. EFC2/AD4.7.29. X.5663 X.8664 HIGHER OUTPUT DYNAMOS. X8664 In the 40/50 HP. case it is understood that a dozen higher output machines have been instructed and made, ourselves… | ||
| scan0292 | The testing and development of higher and intermediate output dynamos for 40/50 HP and 20 HP chassis. | ||
| View original record | X5663 R. from EFC. c. Sg. c. E. Hy. EFCL/ADS.7.29. X5664 X8664 X8665. HIGHER AND INTERMEDIATE OUTPUT DYNAMOS. We have previously reported particulars and output characteristics of both 40/50 and 20… | ||
| scan0293 | The development of new standard armatures for two chassis types, including their specifications and testing plans. | ||
| View original record | -2- these have been developed with a view to their becoming the standard armatures for both chassis if they show satisfactory performance. The present position is, that we have just received for… | ||
| scan0294 | The production and supply of higher output dynamos for the 20 HP and SS car chassis. | ||
| View original record | X 5663 EFC. By/RD5/N6.7.29. Re : Higher Output Dynamos. X 5664 X 8664 X 8665 Referring to your EFC2/AD4.7.29, we would say that we have instructed three higher output machines suitable for the 20 H.P.… | ||
| scan0295 | Record of a 20 HP higher output dynamo being received by the Experimental Department for testing. | ||
| View original record | X5663. 12.7.29. 20 H.P. higher output dynamo 3 H.O. was received by Experimental Dept. for test on above date. EFC. | ||
| scan0296 | Dynamo output and battery charging for the 20 HP and Phantom II models. | ||
| View original record | X5663 To R. from EFC. c. Sg. c. Wor. Ev. c. Hs. PN. EFC3/AD28.11.29. X5663 X7660 X8664 X 5661 X.5664. DYNAMO OUTPUT X.8665. 20 HP. AND PHANTOM II REF: R1/M16.11.29 and R1/M21.11.29. It is agreed that… | ||
| scan0297 | The development of Intermediate Output dynamos with dual major and minor output settings. | ||
| View original record | EFC3/AD28.11.29 contd. -2- reported. A number of these machines have been supplied to clients in special cases. They were initiated as a result of our report EFC3/T27.2.28 and your memo R5/M9.3.28. As… | ||
| scan0298 | Dynamo output tests for the 20 HP model, comparing it to the Phantom case. | ||
| View original record | EFC3/AD28.11.29 contd. -3- In the 20 HP. case tests so far indicate that whereas the cutting in and minor output can be suitable and as described for the Phantom case, the possible major output will… | ||
| scan0299 | Instruction sheet detailing further tests on a 20hp Dynamo N with a 48 coil armature and trailing poles. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 X5663. ROLLS-ROYCE LTD. INSTRUCTIONS. To: EEC Order No: AD.510. Customer's No.: X5663 Date: 7 Feb 1930 20 hp Dynamo with 48 coil Armature and Trailing… | ||
| scan0300 | Test results on machine performance, comparing amperage, RPM, and sparking at different positions. | ||
| View original record | RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To __________ 19__ Order No. __________ Customer's No. __________ and the latter 15.7 amperes peak The 17° position gave a… | ||
| scan0301 | Graph of performance curves for a 20 HP dynamo, showing ampere and voltage output against RPM. | ||
| View original record | AMPERE OUTPUT APPROX: OPERATING VOLTAGE DYNAMO R.P.M. CHASSIS M.P.H. 11/50 AXLE, 31 . 4" DIA: TYRES. Top Curve: M (High Output Armature) 7° 126° July '28 Annotations near top curve: 14° 125° at 80°c,… | ||
| scan0302 | Increasing dynamo output for the Phantom and 20 HP models by modifying armature windings. | ||
| View original record | X5663 To R. from EFC. c. Sg. c. Wor. E. c. Da. By. c. PN. EP. EFC/ADLO.2.30. X.8664. INTERMEDIATE AND HIGHER OUTPUT X.5663. X.8665. DYNAMOS PHANTOM AND 20 HP. X.5664. The problem of increased dynamo… | ||
| scan0303 | Development and advantages of a 48 coil armature machine over standard and higher output types. | ||
| View original record | EFCL/ADLO.2.30 contd. -2- The 48 coil armature of the "intermediate" output type offers certain advantages over the standard and "higher" output type 56 coil armatures from a manufacturing point of… | ||
| scan0304 | Provision and testing of higher output dynamos and armatures for various chassis models. | ||
| View original record | EFC/ADLO.2.30 contd. -3- circuit to produce higher output is now available and will be put on the 20 HP. 10,000 mile test chassis. In the 40/50 HP. case we have one 48-coil armature machine arranged… | ||
| scan0305 | Instruction to remove a higher output 20 HP dynamo from a test bed for use on chassis 12-G4. | ||
| View original record | X5663. RHC. from EFC. EFC10/ADLO.2.30. X.5663. HIGHER OUTPUT 20 HP. DYNAMO. On a 20 HP. test bed engine at present in No.5 test shed, we have a 56-coil higher output 20 HP. dynamo. Will you please… | ||
| scan0306 | Preliminary test report on a 20 hp H-O Dynamo with field resistance. | ||
| View original record | RR 388 (150 BKS.) (OB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To EFC Order No. AD Customer's No. X5663 20 hp H-O Dynamo with Field Resistance (Preliminary) A rough test has been carried… | ||
| scan0307 | Test results and analysis for field resistance and peak machine output, including a data table. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To __________ Order No. __________ Customer's No. 2 The results are shown below. Field resistance | Volts | Amps | Ohms |… | ||
| scan0308 | Insufficient dynamo output on 20/25 HP cars in the U.S.A. and a proposed modification. | ||
| View original record | X5663 To Sg. From Hs. c. to Wor. S. c. to By. EFC. Hs.5/MJ.16.1.31. X5661/3 20/25 HP. DYNAMO OUTPUT. One of the jobs I promised to give attention to when I returned was the troubles they were having… | ||
| scan0309 | Agreeing to a recommendation concerning the dynamo output for the 20/25 HP model. | ||
| View original record | X5663 EFC RECEIVED JAN 19 X. 5661 / 3 To Hs. from Sg. re 20/25 HP. Sg4/E19.1.31 Copy to Wor. E. Dynamo Output. PP. EFC. I am in receipt of Hs.5/MJ.16.1.31. I quite agree with the recommendation… | ||
| scan0310 | Modifications to the 20/25 dynamo output for U.S.A. cars. | ||
| View original record | X5663 To Sg. from EFC. c. Wor. E. c. Ey. Hs. EFC1/AD20.1.31. X.5661/3. 20/25 DYNAMO OUTPUT ON U.S.A. CARS. Referring to Hs5/MJ16.1.31 and your Sg4/M19.1.31 we are taking the necessary steps in this… | ||
| scan0311 | The modification of a 20/25 dynamo for U.S.A. cars. | ||
| View original record | X5663. To Ry. from EFC. To RHC. c. EFC/Mr.Brock. EFC2/AD20.1.31. X.5661/3. 20/25 DYNAMO OUTPUT ON U.S.A. CARS. We are handing to Mr.Brock a present standard 20/25 56-coil armature dynamo No.… | ||
| scan0312 | Output curves and temperature rise settings for 20/25, 56, and 48 coil dynamos. | ||
| View original record | X 5663 To R. from EFC. c. Sg. c. E. Ry. c. Wor..EN. EP. X.5661 X.5663 20/25 56 AND 48 COIL DYNAMOS OF VARIOUS OUTPUTS. X.6005 We now attach a blue print set of curves for 20/25 dynamo labelled 1. As… | ||
| scan0313 | Continued report detailing performance curves for different dynamo modifications. | ||
| View original record | EFC4/AD26.1.31 contd. -2- Curves I and II correspond exactly with curves I and III cn 1. in the 40/50 case. Curve III however, is for a dynamo otherwise similar to I but with the pole piece… | ||
| scan0314 | Continuation page of a report on the operation of the Lucas dynamo. | ||
| View original record | EFC4/AD26.1.31 contd. -3- A report on the operation of the Lucas dynamo including both our observations on the matter with which E. has provided us and also a report upon the operation of the dynamo… | ||
| scan0315 | Output speed performance curves for three different 20/25 dynamos. | ||
| View original record | FJA 20/25 AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE OF 14.0 X.5661. X.5663. X.6005 OUTPUT SPEED PERFORMANCE CURVES OF 20/25 DYNAMOS. I 56 COIL STANDARD MACHINE (58 C° SETTING) 8° 123.5° II 48 COIL… | ||
| scan0316 | Dynamo output of 56 coil 20/25 dynamos with both unmodified and modified poles. | ||
| View original record | X5663. By. from EFC. c. Sft/Mr.Brock. EFC4/AD26.1.31. X.5661/3. DYNAMO OUTPUT OF 56 COIL 20/25 DYNAMOS WITH POLES UNMODIFIED AND MODIFIED. Further to our EFC2/AD20.1.31 we now attach blue print copy… | ||
| scan0317 | Proposal to standardize a higher dynamo output for the 20/25 HP chassis for the U.S.A. market and 'T' series models. | ||
| View original record | SH HS. c. Sg. c. Wor. X5663 BY10/G.26.1.31. RECEIVED 27 JAN 1931 X.5663 20/25 HP. CHASSIS - DYNAMO OUTPUT -------------------------------------- In view of the proposal to send to U.S.A. instructions… | ||
| scan0318 | Blueprints for increasing the 20/25 Dynamo Output. | ||
| View original record | X5663 EFC. BY/RD17/N.26.1.31. X5661/3 Re: 20/25 Dynamo Output. We hand you herewith two blueprints of D.52129 shewing how the poles can be trailed to obtain more output. These should be attached to… | ||
| scan0319 | Letter to the American branch concerning modifications to increase the output of dynamos on 20/25 HP cars. | ||
| View original record | X5663. c. Sg. c. Wor. EFC2/AD. 30th January, 1931. X.5661 X.5663 Mr. Burton, Messrs. Rolls-Royce of America Inc. Springfield, Mass. Dear Sir, Following on the return of Mr. Hives we have been advised… | ||
| scan0320 | Letter detailing the conditions for comparing dynamo output curves before and after modification. | ||
| View original record | Mr. Burton, Messrs. Rolls-Royce of America Inc. 30th January, 1931. -2- Curve I represents the output as the machines are at present and curve III represents the output after modification, these… | ||
| scan0321 | Graph showing the output speed performance curves for three different 20/25 dynamo configurations. | ||
| View original record | FJA 20 / 25 AMPERE OUTPUT AT CONSTANT OPERATING VOLTAGE OF 14.0 X.5661. X.5663. X.6005 OUTPUT SPEED PERFORMANCE CURVES OF 20/25 DYNAMOS. I 56 COIL STANDARD MACHINE (58 C° SETTING) 8° 123.5° II 48 COIL… | ||
| scan0322 | Dynamo output arrangement for the 20/25 HP Chassis, referencing the 40/50 and 'T' Series models. | ||
| View original record | X5663. S/W To Hs. from Sg. re 20/25 HP Chassis. Sgl7/E2.2.31 Dynamo Output. Referring to BY10/G.26.1.31 addressed to you, I should be interested to see your reply. Now that we have settled that, until… | ||
| scan0323 | Proposed change to the half charge scheme for 25 HP dynamos. | ||
| View original record | X 5663 To Sg. From Hs. c. to By. Hs.10/KT.4.2.31. X. 5663 X.6016 25 HP. DYNAMOS. Replying to Sg.17/E.2.2.31. It is not proposed to adopt the half charge scheme on T series, this means a fairly big… | ||
| scan0324 | The testing of a 20/25 dynamo with doubly tapered pole pieces, concluding there is no advantage. | ||
| View original record | X5663 Ey. from EFC. c. Ey/RD. c. Wor. EFC5/AD9.2.31. X.5663. 20/25 DYNAMO WITH DOUBLY TAPERED POLE PIECES. At RD's request we recently received for test from Mr.Brock a 20/25 dynamo with pole pieces… | ||
| scan0325 | Letter from the American branch to Derby regarding a 25HP generator, recommending a full replacement over repair. | ||
| View original record | X5663. ROLLS-ROYCE OF AMERICA, INC. SPRINGFIELD, MASS. EFC Btn-3 X5661/3. February 9, 1931. POST RECEIVED stamp: 20 FEB 1931 RECEIVED stamp: 1931 FEB 20 HS Rolls Royce, Ltd., Derby, England.… | ||
| scan0326 | Test report on a 20/25 HP 56 coil dynamo that overheated, causing the commutator solder to melt. | ||
| View original record | RR 238 (150 BKS.) (DB 461-8-12-24) MP 306975 X.5663. ROLLS-ROYCE LTD. INSTRUCTIONS. To EDO Order No. AD 81- Customer's No. x 1662 20/25 H.P. 56 coil Dynamo with Double Trailer Poles We have received… | ||