Rolls-Royce Archives
| Identifier | Entry | ||
| Scan001 | Note confirming receipt of a Claudel Carburetter type AVT.70 from Mr. Davy. | ||
| View original record | V3824 Hsl/LG. 18th. Jan. 1926. We have received :- 1 Claudel Carburetter type AVT.70 from Mr. Davy. | ||
| Scan002 | New carburetter heating system from Claudel Hobson and a Bi-Fuel System. | ||
| View original record | H. (I) Air to Canadal. [Redacted] er.br. Cr. Br. C. Pop. C. Hs. V3841 Rg1/W21.1.26 The Claudel Hobson people have brought to our notice their new system of carburetter heating, which I understand they… | ||
| Scan003 | Two development paths for testing the Eagle 16 engine, focusing on the blower and induction system. | ||
| View original record | To R. from E. c. to CJ. RG. Hs. X3841 E1/M19.2.26. RE. EAGLE 16. ENGINE. X.4114 X.3841 X.4550 At the present moment E.16. is having its carburetter calibrated by the Claudel-Hobson expert, using the 5… | ||
| Scan004 | Invoice from Messrs. H.M. Hobson Ltd. for various jets and chokes supplied for testing. | ||
| View original record | c. to Hs. c. to WH/WH X.3841 Wd/Dn9/BH29.4.26. We have an invoice from Messrs. H.M. Hobson Ltd. for the nett amount of £18. 2. 7d. covering the following items:- 24 A.V.T.70. Main Jets. 19 " Pilot… | ||
| Scan005 | Carburetter selection for the F.X. engine, comparing Stromberg and Claudel-Hobson models. | ||
| View original record | To R. c. to BJ. Wor. c. to BY. Hs. X3841 Rg5/W21.5.26. CARBURETTERS FOR ROLLS ROYCE F.X. X.3841 X.3933 X.3932 The most suitable carburetter we have found up to the present is the Stromberg NA-Y6. It… | ||
| Scan006 | Follow-up communication regarding an outstanding invoice for parts left by H.M. Hobson Ltd. | ||
| View original record | Rg. c. to Hs. c. to My/WHH. X3841 Wd/Dn3/BH28.5.26. RECEIVED With further reference to our note of the 29th April, ref. Wd/Dn9/BH29.4.26, with reference to certain Jets left by Mr. Davey of Messrs.… | ||
| Scan007 | Modifications to the carburettor and induction pipe system for a Falcon 10 engine. | ||
| View original record | To RG. from R. c. to Wor. BJ. c. to Hs. BY. X3841 RA/M3.6.26. FALCON 10. X.3804 X.3841 R.3933 We are very anxious to get this running, with a new cylinder block and the two horizontal carburetters… | ||
| Scan008 | Sketch for the stud arrangement on the Falcon.X horizontal carburetter. | ||
| View original record | To RG. from E. Copy to BJ. BY. HS. X3841 R2/M.5.6.26. FALCON.X. X.3933. In accordance with Mr. Royce's instructions we send you herewith a sketch - LeC 2249 - shewing the arrangement of the studs for… | ||
| Scan009 | Carburettor and induction pipe designs and placement for the Falcon 10 engine. | ||
| View original record | To RG. from R. X3841 R1/M. 7.6.26. C. to - BJ. " - Wor. " - HS. " BY. FALCON 10. CARBURETTERS AND INDUCTION PIPES X3933 [crossed out] - X.3874. [crossed out] X3841 The advantage of still having the… | ||
| Scan010 | The procurement and design of carburetters for the Falcon.10 engine. | ||
| View original record | To RG.) FROM R. HS ) Copy to BJ. " " BY. X3841 R3/M15.6.26. FALCON.10. CARBURETTERS. -X.3933. VERTICAL DOUBLE CARBURETTERS FOR THE VEE We are hoping to get these very soon, by RG's report of the… | ||
| Scan011 | Progress and plans for vertical and horizontal carburettors for the Falcon.10 engine. | ||
| View original record | To RG.) FROM R. HS ) Copy to BJ. " " BY. X3841 R3/M15.6.26. FALCON.10. CARBURETTERS. -X.3933. VERTICAL DOUBLE CARBURETTERS FOR THE VEE We are hoping to get these very soon, by RG's report of the… | ||
| Scan012 | Drawing LeC.2283 for a 2.5' horizontal duplex carburetter for the Falcon engine. | ||
| View original record | To BY. from E. c. to BJ. RG. Hs. X3841 E2/M28. 8. 26. F.10. CARBURETTER. X.3933 X3841 We send herewith drawing LeC.2283 shewing the 2.5" dia. horizontal duplex carburetter for the Falcon. This drawing… | ||
| Scan013 | Testing the fitting and running of new CH. AVT.64 carburetters on a Falcon X engine. | ||
| View original record | S.S. 493 (40 H) (SL 42 12-7-23). J.H., D. X3841 EXPERIMENTAL REPORT. 1.10.26 COPIES TO: RCJ. BJ WOR. Sy E Da. EP. PN. OY. (RG) Expl. No. 2917a REF. Hs1/LG4.10.26 OBJECT OF TEST. Testing the fitting… | ||
| Scan014 | Test report on the Falcon X supercharger, detailing test conditions, results, and an impeller failure. | ||
| View original record | To R. from Hs/AR. c. to BJ. Wor. c. to RG. E. c. to BY. X3841 Hs. away. Hs/AR/LG15.10.26. FALCON X - SUPERCHARGER. H4550 X.3841 Test conditions. The supercharger was tested on a rig. Power input was… | ||
| Scan015 | Supercharger impeller blade fracture during testing, noting clearances and material hardness figures. | ||
| View original record | contd :- -2- 0.200" and the clearance between the impeller blade tips and the diffuser vane tips is 0.240", instead of 0.200". Fracture of impeller blade. After 3 hrs. running, one of the impeller… | ||
| Scan016 | Performance graph for a Falcon X Supercharger with a Claudel Hobson A.V.T. carburetter at 18,000 RPM, plotting various metrics against air flow. | ||
| View original record | FALCON X SUPERCHARGER CLAUDEL HOBSON A.V.T. CARBURETTER R.P.M. 18,000 Ⓐ ACROSS S/C Ⓑ ACROSS S/C + CARB HP INPUT EFFICIENCY % PRESSURE RISE INS MERCURY TOTAL EFFICIENCY = AIR HP / HP INPUT ADIABATIC… | ||
| Scan017 | Blank page with a red ink stamp from the Derby Print Room. | ||
| View original record | ROLLS-ROYCE LIMITED PRINT ROOM 16 OCT. 1926 DERBY. | ||
| Scan018 | Performance graphs for the Falcon X Supercharger with a Claudel Hobson A.V.T. Carburetter at 20,000 RPM. | ||
| View original record | FALCON X SUPERCHARGER. CLAUDEL HOBSON A.V.T. CARBURETTER R.P.M. 20,000 Ⓐ ACROSS S/C Ⓑ ACROSS S/C + CARB. HP INPUT EFFICIENCY % TOTAL EFFICIENCY = AIR H.P. / HP INPUT ADIABATIC EFFICIENCY = ADIABATIC… | ||
| Scan019 | Heavily faded document with a red 'Print Room' stamp in the bottom right corner. | ||
| View original record | Main text is illegible. Stamp Text: ROLLS-ROYCE LIMITED PRINT ROOM 16 OCT. 1926 DERBY. | ||
| Scan020 | Invitation to Claudel Hobson Ltd. to attend carburetter tests in Derby. | ||
| View original record | 13841 Expl: Dept: 23x Hs2/LG. 25th. Oct. 1926 Messrs. Claudel Hobson Ltd., 27/9 Vauxhall Bridge Rd., London S.W.1. Dear Mr. Davy, We should be very please if you could arrange to come and see us at… | ||
| Scan021 | Letter from H.M. Hobson Ltd. to E.W. Hives confirming a visit to assist with carburettor adjustments. | ||
| View original record | CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, AND TO THE DOMINION & FOREIGN GOVERNMENTS. X3841 PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. TELEPHONE: VICTORIA 4670, (4… | ||
| Scan022 | Three possible carburation systems for the F.10 engine. | ||
| View original record | To RG. from R. c. to BJ. Hs. BY. X3841 R1/M28.10.26. F.10 CARBURETTERS. X.3933 X.3841 Carburation for this engine seems to be possible in 3 ways :- (1) Carburetters in the Vee using the Claudel… | ||
| Scan023 | Adjustments and modifications to the Falcon X carburettor from Claudel Hobson. | ||
| View original record | To R. from Hs/Rn. c. to BJ. Wor. c. to RG. E. c. to BY. X3841 Hs/Rm2/LG3.11.26. FALCON X - CARBURATION. X3933 Mr. Davey, from Claudel Hobson, has been making some adjustments on the carburetters in… | ||
| Scan024 | Operation and advantages of annular chokes, including a diagram and reference to testing on the Falcon X engine. | ||
| View original record | contd :- -2- operation is that the holes should not be too near together so that the air can get between the issuing streams of petrol. The advantages claimed for the annular choke are :- Petrol Feed… | ||
| Scan025 | Poor acceleration and engine stalling issues with the Falcon X carburetters. | ||
| View original record | X38261 To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to BY. Hs/ACL1/LG11.11.26. FALCON X. CARBURETTERS. X3933 The outstanding trouble we experience with the RR. Duplex carburetters is poor… | ||
| Scan026 | Experiments investigating factors that affect engine acceleration, specifically carburettor performance. | ||
| View original record | contd :- -2- EXPERIMENTS TO SHEW FACTORS AFFECTING ACCELERATION. We will first describe what we have found happens in the carburetter when the throttle is opened slowly. The idle jet supplies mixture… | ||
| Scan027 | Carburettor testing and adjustments concerning petrol level, diffuser, and slow running slot. | ||
| View original record | contd :- -3- PETROL LEVEL. It was found absolutely necessary to keep static petrol level as high as possible and we have now raised it to the top of the diffuser tube or about a tenth of an inch below… | ||
| Scan028 | Typed report page detailing tests and modifications on a carburetter to fix acceleration issues. | ||
| View original record | contd :- -4- it as the throttle was closed but owing to space could not insert a larger slotted plug in the present carburetter. We therefore richened up the idler jet at the change over point and… | ||
| Scan029 | Test report on carburetter modifications using a Claudel diffuser from an Eagle carburetter to improve acceleration. | ||
| View original record | contd :- -5- before it can be delivered into the air stream. We have a test with a standard Claudel diffuser taken from an Eagle carburetter in which the jet was fitted vertically in the choke of the… | ||
| Scan030 | Technical report on carburetter experiments concerning acceleration and idler jet performance, recommending modifications. | ||
| View original record | centd :- -6- (1) We cannot appreciably improve the acceleration by alteration to the accelerator well or diffuser unit. (2) The idler jet is at present in operation over a wide range of speed but… | ||
| Scan031 | Blueprint detailing experiments with Claudel jets in a duplex carburettor. | ||
| View original record | EXPTS. WITH CLAUDEL JETS IN R.R. DUPLEX CARBURETTER USUAL PILOT SUPPLY BOSS WHICH CARRIES SPRAY NOZZLE BLANKED OFF CLAUDEL DIFFUSER FROM EAGLE IX CARB. FEED FROM FLOAT CHAMBER EXTENSION TUBE… | ||
| Scan032 | Heavily faded document with a 'PRINT ROOM' stamp from Derby. | ||
| View original record | Main text is unreadable. Stamp text: ROLLS-ROYCE LTD. PRINT ROOM 12 NOV. 1926 DERBY. | ||
| Scan033 | Confirming the decision to completely redesign the F.10 carburettors for improved functionality and accessibility. | ||
| View original record | To RG. & Hs. from R. c. to Wor. BJ. BY. /3841 RL/M12.11.26. RE. RR. F.10 CARBURETTERS. X.3933 X3996 X.3841 X.4044 Referring to the telephone conversation I had with RG. this morning, (here confirmed),… | ||
| Scan034 | Modifications and issues with engine components like carburetors, ignition, and altitude control. | ||
| View original record | contd :- -2- we are altering the altitude control to that of changing depression in the float chamber, as is adopted in the Zenith, Stromberg, and many earlier carburetters. We are expecting RG, here… | ||
| Scan035 | Critique of Claudel carburettor defects and piston performance, outlining areas for investigation and noting improvements from wet liners. | ||
| View original record | contd :- -3- features on these Claudel designed carburetters which cannot be considered ideal. They are - cork float of an unsatisfactory shape, the bad mechanical action of the power jets,… | ||
| Scan036 | Letter from H.M. Hobson, Ltd. acknowledging order No. 61015 and discussing the production schedule for carburettors. | ||
| View original record | CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. TELEPHONE: VICTORIA 4670. (4… | ||
| Scan037 | Letter from H.M. Hobson Ltd. discussing delivery schedules for order 61015 and requesting sizes for chokes and jets. | ||
| View original record | Messrs.Rolls-Royce, Ltd., Date 12. 11. 26. Page 2 those already specified on your order No. 61015. These will follow on delivery of the other two, but they cannot possibly be delivered at the same… | ||
| Scan038 | Performance data for Claudel carburetters fitted to a 'V' type engine, with a proposal for further tests on a 6-cylinder unit. | ||
| View original record | To R. from Hs. c. to BJ. Wcr. c. to RG. E. c. to BY. [handwritten] X3841 Hs2/LG12.11.26. RR. FX. CLAUDEL CARBURETTERS FITTED IN THE 'V'. [handwritten and crossed out] X2934 Below is the best… | ||
| Scan039 | From Wd. to Hs. forwarding a letter from H.M. Hobson Ltd. | ||
| View original record | Hs.from Wd. 13841 Wd1/NJ17.11.26. H.M.Hobson Ltd. I confirm mine Wd1/NJ15.11.26 and send you herewith a letter from the above-mentioned firm dated 15th inst. referring to your telegram of 13th inst.… | ||
| Scan040 | Letter from H.M. Hobson Ltd. regarding the conversion and calibration of jet sizes for AVT.64.B. carburetters. | ||
| View original record | CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. TELEPHONE: VICTORIA 4670. (4… | ||
| Scan041 | Experiments to improve the Falcon X induction system and cold distribution using Claudel Hobson carburetters. | ||
| View original record | To R. from Hs. c BJ. WGR. RG. C. E. EY. X3841 Hs/ACLL/T29.11.26. FALCON X. INDUCTION SYSTEM. X3874 for prints We have made some experiments with the Claudel Hobson carburetters in the Vee with the… | ||
| Scan042 | Manifold design tests for a 6 cylinder F.X. engine, aiming to improve distribution and efficiency. | ||
| View original record | Contd. -2- Hs/ACL1/T29.11.26. the indirect passage way sufficiently to impair the volumetric efficiency. After several tests we arrived at the form shewn in the accompanying sketch, and more in detail… | ||
| Scan043 | Testing and performance of new vertical carburettors compared to the Claudel model. | ||
| View original record | Contd. -3- Hs/ACL1/T29.11.26. for the RR. vertical carburetters, so that we could test them both with the new RR. carburetters. With regard to the distribution, on throttling down we find that this is… | ||
| Scan044 | Letter from H.M. Hobson Ltd. regarding the first models of the type AV48B carburettor. | ||
| View original record | CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. (3841) TELEPHONE: VICTORIA 4670, (4 LINES). TELEGRAMS: "ASSEMBLAGE, LONDON". PLEASE ADDRESS ALL… | ||
| Scan045 | Page 2 of a letter from H.M. Hobson, Ltd. regarding carburettor delivery and trials. | ||
| View original record | Messrs. Rolls-Royce, Ltd., Date 30.11.26. Page 2 esteem it if you would give us instructions as early as possible, as we cannot promise delivery much under four weeks from receipt of order. We trust… | ||
| Scan046 | The performance characteristics of a Falcon X supercharger, detailing inefficiencies in the diffuser and inlet guide vanes. | ||
| View original record | To R. from Hs/AR. c. to BJ. Wor. c. to RG. E. c. to BY. AJS. VS8241 Hs/ARL/LG4.12.26. FALCON X, SUPERCHARGER. K4550 We give herewith set of characteristics for the supercharger with modified rotor and… | ||
| Scan047 | With calculations regarding vane dimensions and airflow characteristics for a supercharger. | ||
| View original record | contd :- -2- vanes to the exact dimensions as given by R.A.E., due to inter- fe-rence. The vanes we have not got are shewn in accompanying figure. The throat of the venturi formed by adjacent vanes is… | ||
| Scan048 | Calculations of comparative gas and wheel velocities at the inlet guide vanes during testing. | ||
| View original record | contd :- o3o With this width there will be no interference. We can then gradually open out the throats tax till we find the width that gives us the best efficiency. (2) Inlet guide vanes. We give… | ||
| Scan049 | Calculations for guide vane angles and a description of supercharger testing methods. | ||
| View original record | contd :- -4- These figures show that considerable losses must take place at the inlet guide vanes. We suggest that we try removing the guide vanes altogether, and also make some up with a varying… | ||
| Scan050 | Page detailing the methodology for testing supercharger performance, including torque and air measurement, and efficiency estimation. | ||
| View original record | contd :- -5- reaction on the supercharger casing, which is swung on ball bearings similar to a Froude brake. For torque measurements the pointer 'P' on the torque arm is always brought to a fixed… | ||
| Scan051 | Analysis of supercharger pressure measurements and calculations for adiabatic efficiency. | ||
| View original record | contd :- -6- Outlet pressure / Eye pressure = +3 / +2 and in the second case (B) Outlet pressure / Drum pressure = +3 / +1 The first set of figures give a truer value, since our pressure measurements… | ||
| Scan052 | The total efficiency formula and a weight breakdown for the Falcon X supercharger components. | ||
| View original record | contd :- -7- (2) Total efficiency. Total efficiency = Air HP. / power input. Air HP. = (n / (n-1)) * (96 W T1 (r^((n-1)/n) - 1)) / 33,000 where W = air delivery in lbs/min. ---------------------… | ||
| Scan053 | Performance graph for a Falcon X Supercharger with a Claudel Hobson A.V.T. Carburetter at 18,000 RPM. | ||
| View original record | FALCON X SUPERCHARGER CLAUDEL HOBSON A.V.T. CARBURETTER R.P.M. 18,000 Ⓐ ACROSS S/C Ⓑ ACROSS S/C + CARB. H.P. INPUT EFFICIENCY % PRESSURE RISE INS MERCURY LBS AIR/MIN x------x TOTAL EFFICIENCY = AIR… | ||
| Scan054 | Blank page with a Print Room date stamp from Derby. | ||
| View original record | ROLLS-ROYCE LIMITED. PRINT ROOM -6 DEC. 1926 DERBY | ||
| Scan055 | Performance graphs for a Falcon X Supercharger with a Claudel Hobson A.V.T. carburetter at 20,000 R.P.M. | ||
| View original record | FALCON X SUPERCHARGER CLAUDEL HOBSON A.V.T. CARBURETTER R.P.M. 20,000 Ⓐ ACROSS S/C Ⓑ ACROSS S/C + CARB HP INPUT EFFICIENCY % PRESSURE RISE INS. MERCURY LBS AIR/MIN. x---x TOTAL EFFICIENCY = AIR HP /… | ||
| Scan056 | Blueprint diagram of a supercharger testing rig. | ||
| View original record | P TORQUE ARM. DRUM TEMPERATURE. T₁ DRUM PRESSURE. h₁ LOW PRESSURE DRUM CLAUDEL HOBSON CARBURETTER OUTLET PRESSURE. h₃ OUTLET TEMPERATURE. T₂ CALIBRATED VENTURI EYE PRESSURE. h₂ ADJUSTABLE ORIFICE… | ||
| Scan057 | Stamped document page from the Photo Room in Derby. | ||
| View original record | ROLLS-ROYCE LIMITED PHOTO ROOM - 6 DEC. 1926 DERBY | ||
| Scan058 | Technical drawing detailing the layout of a diffuser with specific angles and diameters. | ||
| View original record | [ "LAYOUT OF DIFFUSER TO PARTICULARS GIVEN BY RAE.", "SCALE 2/1", "C OF BETWEEN VANES", "9°-13'-51"", "72°", "90°", "30°", "9°-42'", "INSIDE DIA. OF DIFFUSER VANE RING", "OUTSIDE DIA. OF ROTOR BLADE",… | ||
| Scan059 | Urgent internal memo requesting an order for two AV-48-B type carburetters from Messrs. H.M. Hobson. | ||
| View original record | x3841 To Wd/Ms. from Hs/Rm. Hs/Rm2/LG9.12.26. Will you please order for us from Messrs. H.M.Hobson, 29 and 31 Vauxhall Bridge Rd., London S.W.1. :- 2 AV-48-B type carburetters. This matter is urgent.… | ||
| Scan060 | Letter to H.M. Hobson Ltd. regarding the purchase of two AV-48-B type carburetters. | ||
| View original record | Expl: Dept: X3841 Hs/Rm3/LG. 9th. December 1926 Messrs. H.M.Hobson Ltd., 29-31 Vauxhall Bridge Rd., London S.W.1. Dear Sirs, With reference to your letter of the 30th.ult. We have decided to purchase… | ||
| Scan061 | Letter from H.M. Hobson, Ltd. confirming an order for two AV-48-B carburetters. | ||
| View original record | Y3841 CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. TELEPHONE: VICTORIA 4670, (4… | ||
| Scan062 | Tests conducted on the valve bounce phenomenon in the F.10 engine. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to BY. X5841 Hs/ACL1/LG13.12.26. F.10 - VALVE BOUNCE. 43022 We have made some tests in connection with the inlet valve bounce phenomenon which is… | ||
| Scan063 | Engine tests observing valve and cam motion under different carburetor and timing settings, including a diagram of a cam and roller. | ||
| View original record | contd :- -2- observe no difference between this and the previous test. The next step was to again use the two three cyl. pipes and run on one carb. only, which enabled the other carburetter throttle… | ||
| Scan064 | Investigation into the causes of valve rotation, erosion, and bounce in engines. | ||
| View original record | contd :- -3- the studs and found that they also rotated in a similar manner and in the same direction as the valves. It occurred to us that this may have some connection with the valve erosion which… | ||
| Scan065 | List of carburetter parts received on loan from Messrs. Claudel Hobson. | ||
| View original record | X.3841 17.12.26. Received from Messrs. Claudel Hobson on loan per Mr. Davey :- 4 Chokes. 4 slow running jets. 10 main jets. 4 power jets. 2 carburetters - AV-48. ------------------------- | ||
| Scan066 | Preliminary test results for the new F.10 carburetters fitted on a 6-cylinder Vee unit. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. E. c. to EY. Handwritten: X3841 RR. F.10: CARBURETTERS IN THE VEE. Handwritten: X3933 X3932 We have now had the new RR. F.10. carburetters in the Vee… | ||
| Scan067 | Carburettor adjustments for improved acceleration in car and aeroplane engines. | ||
| View original record | contd :- -2- the spray holes we have found is much too low to give vigorous and certain acceleration from low idling speeds. With this level and choke dia, we can safely say it is not passable… | ||
| Scan068 | Examination of Stromberg and Claudel carburettor designs, focusing on fuel levels and float chamber arrangements for aircraft engines. | ||
| View original record | contd :- -3- level in the diffuser tube would vary with a 'plane in different positions. Examining the Stromberg carburetter as used on the Curtiss engine, we find they employ a level as high as .187"… | ||
| Scan069 | Carburetter and choke adjustments for Condor, Eagle, and Falcon aero engines. | ||
| View original record | Contd :- -4- tube is located practically inside one of the float chambers the mixture being taken to the choke by a series of passages terminating in a spray nozzle similar to the original RR.… | ||
| Scan070 | Sketch showing how petrol feed to a diffuser is influenced by the position of the plane, including a diagram of a Stromberg float chamber. | ||
| View original record | SKETCH SHEWING HOW PETROL FEED TO DIFFUSER CAN BE INFLUENCED BY POSN OF PLANE. 25° DIVE. - REAR CARB. TENDS TO FLOOD. FRONT TENDS TO STARVE 45° ZOOM AFTER DIVE REAR CARB TENDS TO STARVE FLOAT PETROL… | ||
| Scan071 | Heavily faded and mostly illegible single-page document with a red ink stamp in the bottom right corner. | ||
| View original record | ROLLS-ROYCE LIMITED PRINT ROOM -3 JAN. 1927 DERBY | ||
| Scan072 | Modifications to the carburettor float design for the Vee engine. | ||
| View original record | To E. RG. HS. c. to BJ. Wor. BY. RR. F.10. CARBURETTERS. X3841 RL/M7.1.27. X.3933 X.3841 Confirmation and addiations to my telegram. The RR. design for the Vee probably has the defect of being too… | ||
| Scan073 | Failure of a Spanish carburetter and proposing further tests and modifications. | ||
| View original record | contd :- -2- other conclusions i.e., jet and diffuser in float was a failure because of the capacity to be filled up in the diffuser passages: therefore the Spanish carburetter is wrong. I have not… | ||
| Scan074 | Design proposals and modifications for 'V' engine carburettors. | ||
| View original record | To RG. E. Hs. From R. c. to BJ. WsP. BY. 43841 RI/M15.1.27. F.10. CARBURETTERS FOR 'V'. X.3933 X.3841 These are to permit of high level petrol and to be unaffected by tilting and acceleration. I… | ||
| Scan075 | Design improvements for V-engine carburettors, including the float pivot and diffuser emulsion scheme. | ||
| View original record | To E. HS. RG. from RG. c. to BJ. Wor. BY. RR. F.10. CARBURETTERS - IMPROVED X. 3933 RR. TYPE FOR VEE. X. 3841 It would seem necessary that the pivot for the float must have centre at the side, thus -… | ||
| Scan076 | Design improvements for F.10 carburetters, focusing on the diabolo float, throttle adjustments and idling jet. | ||
| View original record | To R. from E. c. to BJ. RG. Hs. RR. F.10. CARBURETTERS. IMPROVED X.3933 RR. TYPE FOR VEE. X.3841 Referring to your memo. of the 23rd, I had refrained from sending you a rough scheme of the above,… | ||
| Scan077 | Letter to H.M. Hobson Ltd. expressing disappointment with small car carburetters and inquiring about potential aero carburetter alternatives. | ||
| View original record | X3841 Expl: Dept: Hs/Rml/LG. 27th. Jan. 1927 Messrs. H.M.Hobson Ltd., 27-29 Vauxhall Bridge Rd., London S.W.1. Dear Sirs, We are very disappointed with the results of the 2 small car carburetters… | ||
| Scan078 | Letter from H.M. Hobson Ltd. regarding carburettor issues and air intake position on a 40-50 HP engine. | ||
| View original record | CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. X3841 TELEPHONE: VICTORIA 4670 (4… | ||
| Scan079 | Page 2 of a letter from H. M. Hobson Ltd. regarding the placement of baffles inside a tank. | ||
| View original record | Messrs. Rolls Royce Ltd. Date 28/1/27. Page 2. that it must be near one of the baffles and we were propos- ing to put it towards the centre close to the near side baffle plate. We shall be very glad… | ||
| Scan080 | Proposed new design of carburettors for the 'Vee' engine, focusing on float chamber and emulsion tube placement. | ||
| View original record | To R. from Hs/ACL. √38261 Hs/ACL1/T22.1.27. c. BJ. WOR. RG. c. E. BY. F.10. CARBURETTERS FOR THE "VEE" √3933 We have consulted together on the various points with regard to the proposed new design of… | ||
| Scan081 | List of desirable features and modifications for a carburetter system, page 2. | ||
| View original record | Contd. -2- Hs/ACLL/T22.1.27. 1. Diffuser or emulsion tube placed directly in the choke. 2. Choke giving free area past the diffuser of 1.905 sq." 3. Fore and aft float chambers so that a high petrol… | ||
| Scan082 | Concluding with an agreement to proceed with preliminary air tests. | ||
| View original record | -3- Contd. have been agreed to by RG. and E. we can make them sufficiently satisfactory to enable prelkminary tests to be made in the air. Hs/A.C.Lovesey. | ||
| Scan083 | The procurement of two CZP model carburettors from Messrs. Hobson Ltd. on a sale or return basis. | ||
| View original record | To Wd/Ms. from Hs/Rn. X3841 Hs/Rnl/LGl. 2. 27. Will you please obtain from Messrs. Hobson Ltd., 27-29 Vauxhall Bridge Rd., London S.W.1 :- 2 CZP. model carburetters. We wish to have these carburetters… | ||
| Scan084 | Poor results from Stromberg carburetters and proposing to test Claudel carburetters. | ||
| View original record | To R. from Hs. c. to BJ. Wor. c. to RG. E. c. to BY. X3841 Hs4/LG10.2.27. STROMBERG CARBURETTERS. X3932 The expert from Strombergs could not shew us any reasonably good results with their carburetters… | ||
| Scan085 | Letter from H.M. Hobson regarding the testing and return of two copper air intake liners and a follow-up on a sales agreement. | ||
| View original record | CONTRACTORS TO THE ADMIRALTY, WAR OFFICE, AIR MINISTRY, AND TO THE DOMINION & FOREIGN GOVERNMENTS. PLEASE ADDRESS ALL COMMUNICATIONS TO THE FIRM, NOT TO INDIVIDUALS. 43841 TELEPHONE: VICTORIA 4670. (4… | ||
| Scan086 | Letter to H.M. Hobson Ltd. regarding carburettor tests, a telegage unit for a 20 HP car, and delays with a 40/50 HP car. | ||
| View original record | Expl: Dept. HS/Rn2/LG. 12th. Feb. 1927. Messrs. H.M.Hobson Ltd., 29-31 Vauxhall Bridge Rd., London S.W.1. Dear Sirs, With reference to your letter of the 11th.inst. We have not completed our tests on… | ||
| Scan087 | Make-or-buy decision for carburettors for the F.10 engine. | ||
| View original record | 8583 43841 To E. RG. DA. Hs. from R. c. to BJ. Wor. ROLLS-ROYCE LIMITED DERBY R1/M13.2.27. CARBURETTERS FOR RR. F.10. X.3933 X.3841 X.3932 If Claudel or Stromberg or anyone else can supply us with… | ||
| Scan088 | Endurance test report on carburettor freezing issues leading to increased petrol consumption. | ||
| View original record | To R. from Hs/ACL. c. to BJ. Wor. c. to RG. H. c. to BY. X3841 Hs/ACL1/LG14.2.27. RR. F.10. CARBURETTERS. X933 X2510 During an endurance test on the hangar with the airscrew, trouble was experienced… | ||
| Scan089 | Report page discussing carburettor freezing tendencies in aircraft engines and potential solutions, with an extract from a Curtiss engine test. | ||
| View original record | cpntd :- -2- evidence supports the above assumption. The air intake used on these particular carbs. was not fitted with the stack pipe having the hot water pipe passing through it. We think that the… | ||
| Scan090 | Report discussing engine weakening at high altitude due to potential carburettor freezing in various aero engines. | ||
| View original record | contd :- -3- happening on these other engines but have occasionally had reports from pilots in which they say sufficient weakening could not be obtained on the mixture control at high altitude and… | ||
| Scan091 | Carburetter freezing and requesting information on carburetter design used by a record-breaking pilot. | ||
| View original record | To Lp. from Hs. X3841 Hs4/LG14.2.27. CARBURETTER FREEZING. X3933 We have been considering the possibilities of the diffusers in the carburetters freezing up under low temperature conditions and if the… | ||
| Scan092 | Recommendations from a conference on carburetter design and modifications. | ||
| View original record | 8870 To R. from E. c. to BJ. RG. Hs. c. to 43841 E3/115. 2.27. F.10. CARBURETTER. X.3933 X.3932 X.3841 The following are the recommendations of a conference at which RG. Hs. DA. E. and Mr. Lovesey… | ||
| Scan093 | Carburettor issues related to slow running plugs, throttles, and jet levels. | ||
| View original record | .BB Contd :- -2- A tapped boss for this already exists on the carb. and there remains but to provide the front drain pipe. Further to the above the following points arose in discussion with Hs. and… | ||
| Scan094 | Continuation page of a typed memo regarding points for carburetter production. | ||
| View original record | contd :- -3- We have points (1) (2) (3) and (5) in hand, and expect to send them through this week, so that if thought desirable they can be incorporated in the carburetter before it is produced. E. | ||
| Scan095 | Carburetter icing, hot water jacketing, and comparing carburetter designs and supercharger configurations. | ||
| View original record | To RG. To Hs. from R. c. to BJ. Nor. ROLLS-ROYCE LIMITED DERBY X3841 R3/120.3.27. FP-10 CARBURETTERS & SUPERCHARGER. X.3933 X.4550 X.3841 It would seem that we should hot water jacket the carburetters… | ||
| Scan096 | Letter to H. M. Hobson Ltd. regarding the calibration of a gauge face for a 40/50 HP model and the return of four carburettors. | ||
| View original record | X38041 Hs/Rm5/LG. 21st. Feb. 1927. XLL038bbA Messrs. H. M. Hobson Ltd. 27-29 Vauxhall Bridge Rd. [STAMPED: RECEIVED] London S.W.1. Dear Sirs, With reference to the gauge face which you are preparing… | ||
| Scan097 | Letter to H.M. Hobson Ltd. requesting a representative to assist with unsatisfactory carburettor test results on a Vee aero engine. | ||
| View original record | [Handwritten Number]: Y3844 Expl: Dept: Hs/Rn4/LG. 1st. Mar. 1927. Messrs. H.M. Hobson Ltd., 27-29 Vauxhall Bridge Rd., London S.W.1. Dear Sirs, For the attention of Mr. Davey. We have your… | ||
| Scan098 | Bristol-Jupiter Claudel carburettor and suggesting it be acquired for testing. | ||
| View original record | (384) RG. Hs. from R. c. to BJ. R2/M10.12.27. BRISTOL-JUPITER CLAUDEL CARB: X.3841 X.4045 The back cover of the Dec.1 issue of 'Flight' shews the Jupiter carburetter of a type you condemn. We suggest… | ||
| Scan099 | Delivery of chassis rear springs with specific modifications, following a telephone conversation with Mr. Alfred Woodhead. | ||
| View original record | Handwritten notes: Hs c.Wd. c.D. c.Wor. (circled with a line through) To EFE X.2628b. Top of page: Y 06256 (crossed out) X3854 BY/15/H.5.5.20. CHASSIS REAR SPRINGS. In discussing the question over the… | ||
| Scan100 | Proposal from Jonas Woodhead & Sons Ltd. for supplying and modifying rear chassis springs. | ||
| View original record | R.R. & Co., 100(T)DLY. 278. 16.4.(9) C1. 2554 X3854 Wor. from Wd. c.to [illegible] c.to Hs. c.to Hx. c.to HR. Wd12/NJ13.5.20. Rear Springs for Chassis. Jonas Woodhead & Sons Ltd. have written that… | ||
| Scan101 | Arranging a meeting with Messrs. Woodheads regarding the modification of rear springs. | ||
| View original record | Wd. from BY. Hs. Da. X3854 BY5-P21.5.20. CHASSIS - RE REAR SPRINGS. -------------------------- In order to try and come to some definite arrangement with Messrs. Woodheads with regard to the question… | ||
| Scan102 | Status update on the production and dispatch of rear springs from supplier Jonas Woodhead & Sons Ltd. | ||
| View original record | R.R. 235 A (100 T) (R.F. 846. 6-8-19) G. 2460. X3854 [Strikethrough text] Wot. from Wd c. to By c. to Bar. c. to Hs. c. to Insp. [/Strikethrough text] X2628 X4056 X.3981 Wd15/WJ1.6.20. In reply to… | ||
| Scan103 | The testing of rear road springs without nibs and slots, detailing cracking failures after a bump rig test and squeaking during an on-car trial. | ||
| View original record | V3854 To R. from Hs. c. to C.J. c. to Bn. c. to E. c. to Da. c. to By. X2 Hs2/LG3.6.20. X.3981. X.2628.L RE ROAD SPRINGS. We have now completed 36 hours running on the bump rig with a pair of rear… | ||
| Scan104 | Spring bedding issues and testing new spring modifications with Ferodo strips. | ||
| View original record | Contd. -2- Hs2/LG3.6.20. although we do not consider they were as bad as the present standard springs in that respect. We have taken the springs apart and examined the bedding and find that they still… | ||
| Scan105 | The material supply for laminated rear springs from the supplier Jonas Woodhead & Sons Ltd. | ||
| View original record | X.3056B X3854 Wor. from Wd. c. to Hr. c. to BY. c. to Da. c. to Hy c. to Hm c. to EP c. to Hs. c. to Wd13/NJ7.6.20 X.4056 - Laminated Rear Springs for chassis. X.2628B Jonas Woodhead & Sons Ltd., have… | ||
| Scan106 | Retrofitting of shock dampers versus perfecting the springs and springing on existing cars. | ||
| View original record | X3854 To Wor. from R. c. to CJ. c. to BY c. to Hy. c. to Hs. c. to HM. c. to Wd. c. to EP. c. to Hr. c. to Bn. R14/G8.6.20 X.3614BRE SHOCK DAMPERS. X.2628B In reading over the memo of your… | ||
| Scan107 | Visit report to supplier Jonas Woodhead & Sons Ltd. concerning the production and testing of front and rear springs. | ||
| View original record | Wor. from Wd. c.to By- c.to Er. c.to Sa. c.to Hs. c.to Fg. X3854 Wd8/NJ14.6.20. X4056 Jonas Woodhead & Sons Ltd. X4400 I visited these people on Friday last, 11th inst. I had already forwarded to them… | ||
| Scan108 | Proposal for Woodhead's to test repaired and re-built springs. | ||
| View original record | - 2 - changed over get into his hands in addition to the springs for production and repair springs. He suggested that some of the testing might be undertaken by his (Woodhead's) own men, until the… | ||
| Scan109 | Visit from Jonas Woodhead & Sons Ltd. to discuss rear and front spring design and supply. | ||
| View original record | Y3854 X.2628 BY. From Wd. c. to Hs. c. to Da. c. to EP. c. to CO/Dn. Wd1/NJ18.6.20. X.4056 - Jonas Woodhead & Sons Ltd., X.2628. We are advised that Mr. Alfred Woodhead will visit us next Monday,… | ||
| Scan110 | Order for rear springs of 2000 and 2100 poundage and requesting two additional springs to be produced to drawing N.391. | ||
| View original record | X3854 Wd. from BY. c.c. Hs. c. EFC. BY6-P16.7.20. CHASSIS - REAR SPRINGS & FITTINGS. -------------------- Referring to the order we recently placed for two sets of springs to be respectively of 2000… | ||
| Scan111 | Correspondence regarding an order for road springs for Rolls-Royce of America Inc., noting delays and pattern issues for rear springs. | ||
| View original record | Ref. from c.to Wor. c.to Hy. c.to Hs. c.to D/EP. c.to Hs. X3854 WdB/NJ.6.8.20. X3400 Road Springs for Rolls-Royce of America Inc. 82628 In reply to yours EWT18/G5.8.20, we are to-day ordering from… | ||
| Scan112 | Discussion on reverting to a pre-war design for rear road springs and the approval of a new spring clip. | ||
| View original record | R.R. 199 (500T) (SDc/6 19-7-17) MP 18686. X3854 To By. from Da. Copy to Hs. Copy to Wor. c. to EFC. Da6/CB11.8.20. X.4056. RE REAR ROAD SPRINGS. X.2628b. We discussed the question of rear road springs… | ||
| Scan113 | Confirming the manufacturing details of chassis front springs from Jonas Woodhead & Sons Ltd. | ||
| View original record | R.R. 235 B 5 (T) (S.G. 501, 8-1-20) G. 2585. X3854 By from Wr. ['from' is struck through] c. to Hs. c. to Da. [struck through] c. to Ms. [struck through] Wd3/KJ18.8.20. Chassis Front Springs. In reply… | ||
| Scan114 | Design and manufacturing of chassis rear road springs. | ||
| View original record | Wd. from BY. c. H. c. Da. c. Mr Booth. c. EFC. V3854 BY7-P19.8.20. CHASSIS - REAR ROAD SPRINGS. The question of rear road springs was discussed with Mr Royce recently and he decided that the best… | ||
| Scan115 | Cover note forwarding correspondence with Jonas Woodhead & Sons Ltd. regarding rear springs for print F.7973. | ||
| View original record | By. from Wd. c. to Day. c. to Hs. c. to Mr. 13854 Wd5/NJ6.9.20. Rear Springs to print F.7973. Herewith I send you copy of our letter Wd12/NJ2920, of 2nd inst. to Jonas Woodhead & Sons Ltd. also copy… | ||
| Scan116 | Letter to supplier Jonas Woodhead & Sons Ltd. regarding the specifications, delivery, and pricing for rear springs. | ||
| View original record | 10-35 a (100 T) (N.Y. 846 6.8.19) G. 2460. COPY. Wd12/NJ2920. 2nd. Sept. 1920. Messrs. Jonas Woodhead & Sons Ltd., Kirkstall Road, LEEDS. Dear Sirs, REAR SPRINGS TO PRINT F.7973. Referring to the… | ||
| Scan117 | Letter to Jonas Woodhead & Sons Ltd. regarding the preference for box pattern clips for new pattern (F7973) rear springs. | ||
| View original record | 835 A (100) T. (R.F. 846 6-8-19) G. 9460 2nd Sept. 1920. Messrs. Jonas Woodhead & Sons Ltd. not be increased. With regard to the clips for the new pattern (F7973) rear springs, we prefer the box… | ||
| Scan118 | Letter from supplier Jonas Woodhead & Sons Ltd. regarding the specifications of rear springs. | ||
| View original record | A.100 T. (S.F. 846 6-8-19) G. 2460 C O P Y. LETTER RECEIVED FROM:- JONAS WOODHEAD & SONS LTD., LEEDS. Your Ref -Wd12/NJ2920. Our Ref-FJL/CP. 3rd. Sept. 1920. Messrs. Rolls-Royce Ltd., Nightingale… | ||
| Scan119 | Correspondence with Jonas Woodhead & Sons Ltd. regarding a preference for a pre-war form of parabolic shearing for rear springs. | ||
| View original record | EY. from Wd. c. to Da. c. to Hs. c. to Ms. X3854 Wd8/NJS.9.20 X.3950 - Rear Springs to print F.7973 X.2628. Following a conversation which I had with By. about the 2nd. inst. I wrote Jonas Woodhead &… | ||
| Scan120 | Claim from Jonas Woodhead & Sons, Ltd. for specially made rear and front springs and associated costs. | ||
| View original record | Hs. from Wd. X3854 Wd12/FJ17.9.20. Jonas Woodhead & Sons, Ltd. We have now received from these people, details of their claim against us for 28 Rear Springs and 2 Front Springs, specially made and… | ||
| Scan121 | Correcting the quantity of rear springs delivered by Jonas Woodhead & Sons Ltd and the updated total cost. | ||
| View original record | Hs from Wd. X3854 Wd1/NJ/22.9.20. Jonas Woodhead & Sons Ltd. Since writing mine Wd12/FJ17.9.20, it has come to my knowledge that Jonas Woodhead & Sons Ltd. have delivered to us 30 rear springs, not 28… | ||
| Scan122 | Agreeing to an extra payment of £150 to Jonas Woodhead & Sons Ltd. for experimental springs. | ||
| View original record | R.R. 225a (100 T.) S.H. no. 22-7-20 G 2269 To Wd. From Hs. AAS X3854 Hs4/LG4.10.20. Re. Jonas Woodhead & Sons Ltd. With reference to your memos. ref:- Wd12/FJ17.9.20 and Wd1/NJ22.9.20 we quite agree… | ||
| Scan123 | Copy of a letter from J. Woodhead & Sons Ltd. regarding a new rear spring sent for inspection. | ||
| View original record | M Hives X2628 Y3854 R.R. 238a (100 T.) (S.H. 139, 11-8-20) G. 3200 [STAMP: RECEIVED OCT] COPY OF LETTER FROM:- J.WOODHEAD & SONS LIMITED. LEEDS. Ref: FJL/AH. 15th October 1920. Messrs. Rolls-Royce… | ||
| Scan124 | Testing of rustless chassis springs from Jonas Woodhead & Sons Ltd. | ||
| View original record | Hs X2626 X5854 R.R. 385a (100 T) (S.G. 645, 19-2-20) G. 2018 By. from Wd. a. to Da. c. to Hs. Or. to Hs. RECEIVED OCT 1920 Wd2/NJ21.10.20. Rustless Chassis Springs. A firm with whom Jonas Woodhead &… | ||
| Scan125 | Querying future design specifications for chassis front springs on behalf of supplier Jonas Woodhead & Sons Ltd. | ||
| View original record | H.R. 988a (100 T) (S.O. 643. 19-2-20) G. 2618 X2628 X3854 By. from Wd. c.to Da. c.to Hs. c.to Ms. [STAMP] RECEIVED 13.8.20. Wd1/NJ21.10.20. Chassis Front Springs. Please refer to your notes… | ||
| Scan126 | Specifications for front and rear chassis springs in response to a letter from Messrs Woodhead. | ||
| View original record | X3854 BY5/H. 22. 11. 20. Hs tobe RECEIVED NOV 22 1920 Wd. C. Hs. C. Mr. Booth. C. Da. C. Msr X 2628 CHASSIS - FRONT & REAR SPRINGS. Referring to Messrs Woodhead's letter of the 19th inst, which I… | ||
| Scan127 | Objecting to a sample from Messrs. Woodhead showing riveting instead of bolts for fastening clips to spring plates, citing strength issues. | ||
| View original record | To WD. from DA. c. to-EFC. X3874 DA6/AH12.11.1920. With reference to the sample showing the method of fastening clips to spring plates which, we believe, has been sent to us by Messrs. Woodhead for us… | ||
| Scan128 | Comparing the cost implications of revised prices for different road spring patterns from Jonas Woodhead & Sons Ltd. | ||
| View original record | Wor.From Wd. c.to Hr. c.to Hy. c.to Hm. c.to By. c.to Hs. c.to Ef. X3854 Wd9/HJ17.11.20. Road Springs. As reported in the Minutes of Works Committee Conference of yesterday, we have obtained revised… | ||
| Scan129 | Use of square versus round edge steel for chassis springs with supplier Jonas Woodhead & Sons. | ||
| View original record | Hs RECEIVED 26 NOV 1920 By from Wd. c.to Ds. c.to Hs. K2601 X3854 <8628 x.4056 WdG/MJ26.11.20. Chassis, Front and Rear Springs. Following receipt of yours Hy5/H22.11.20 and the conversation which I… | ||
| Scan130 | Letter from a supplier discussing the material for front and rear springs, offering a cost saving and declining a request to use flat material. | ||
| View original record | R.R. 285A (100 T) (S.G. 845, 19-5-20) G. 2618 COPY. LETTER RECEIVED FROM:- MESSRS. JONAS WOODHEAD & SONS LTD. LEEDS. Your Refs:-Wd13/NJ221120. Wd3/NJ231120. Our Ref:- E.O.251120K. 25th November 1920.… | ||
| Scan131 | Communication regarding instructions given to Jonas Woodhead & Sons Ltd. for chassis front and rear springs. | ||
| View original record | By. from Wd. c. to Da. c. to Hs. RECEIVED DEC 1 1920 Hs X3854 Wd3/NJ30.11.20. Chassis Front and Rear Springs. In reply to mine Wd6/NJ26.11.20, I have received Da's note Da10/CB27.11.20 and in… | ||
| Scan132 | Letter to a supplier discussing the material specifications for front and rear springs and authorising production. | ||
| View original record | R. 285A (100 T) (S & G. 645. 19-5-20) G. 2616 X828 X3854 Wd2/NJ301120. 30th November,1920. Messrs.Jonas Woodhead & Sons Ltd., Kirkstall Road, Leeds. Dear Sirs, We duly received yours ref.- EO.251120,… | ||
| Scan133 | Confirming an agreement with Jonas Woodhead & Sons to change the material for rear springs to round edge, slightly concave. | ||
| View original record | Hs X2628 X3854 By. from Wd. c. to Hs. RECEIVED DEC 9 Wd5/NJ3.12.20. Chassis Front & Rear Springs. Further to mine Wd3/NJ30.11.20, we are now in receipt of a reply from Jonas Woodhead & Sons to our… | ||
| Scan134 | Despatch and testing of Rustless Chassis Springs from supplier Jonas Woodhead & Sons Ltd. | ||
| View original record | By. from Wd. c. to De. c. to Hs. c. to MD/Dm. X3854 Rustless Chassis Springs. Further to mine Wd2/NJ21.10.20, we are this morning in receipt of a letter from Jonas Woodhead & Sons ltd. dated 14th… | ||
| Scan135 | Laboratory analysis comparing the chemical composition of an American spring and a Woodhead's spring. | ||
| View original record | R.R. 925A (100T) (S.H. 728. 10-12-20) G. 2947 X3854 HS. H11/EB11.8.21. Laboratory. Re American Spring and Woodhead's x3900 Spring. Analysis. American. Woodhead's. Carbon .42 .55 Manganese .85 .40… | ||
| Scan136 | Heat treatment issues for front and rear road springs with supplier Woodheads and proposing alternative suppliers. | ||
| View original record | R.R. 199 (250T) (SD570 19-7-17) MP180865 X3854 Hs. from BY. BY2-P5.10.21. FRONT & REAR ROAD SPRINGS. Referring to Na2/S2921, I am quite in agreement with what Na, says. for a long time past I have… | ||
| Scan137 | Notification regarding short Centre Bolts for Goshawk II Front Springs, requiring temporary replacements. | ||
| View original record | Hs. from O.O. X3854 Wd/Dn4/HP181021. 18th Oct. 1921. X4261 X2628 Please note that the Centre Bolts supplied to Messrs. J. Woodhead & Sons Ltd. for Goshawk II Front Springs are slightly short. Messrs.… | ||
| Scan138 | Requirement for various nuts and bolts for the Goshawk II front and rear springs. | ||
| View original record | R.R. 855A (50 T) (S H. 986. 19-8-21) G. 2008 X3854 2 Hs. C to RHC. Wd/Dn10/HP181021. 18th Oct. 1921. FRONT AND REAR SPRINGS - GOSHAWK II X4261 X4262 Please note that we shall require the… | ||
| Scan139 | The testing of Woodhead springs with recommendations for poundages and future use. | ||
| View original record | X3854 To EY. from Hs. c. to Wd. c. to Gor. c. to Roy. Hs5/LGS. 2. 22. "WOODHEAD" SPRINGS. With reference to the springs sent to us by Messrs. Woodheads made to their own design. We have bumped these… | ||
| Scan140 | Copy of a letter from J. Woodhead & Sons Ltd. regarding a set of springs sent for a bumping test. | ||
| View original record | R.R. 63 (50 T) (S.J. 252, 26-8-21). G. 3069. X3854 COPY OF LETTER FROM:- J. WOODHEAD & SONS LIMITED. LEEDS. Our Ref. FJL/EH. 6th February. 1922. X2628 X4268 Messrs. Rolls-Royce Ltd., Nightingale Road,… | ||
| Scan141 | Query regarding the test results for galvanised front springs supplied by Jonas Woodhead & Sons Ltd. | ||
| View original record | X3854 By.from Wd. c.to Hs. c.to Ms/Dn. Wd3/NJ21.6.22. RECEIVED Rustless Chassis Springs. With reference to the remarks in mine Wd2/NJ21.10.20 and Wd1/NJ15.2.21, we are in receipt of a letter from… | ||
| Scan142 | Examination of a failed road spring from chassis 1-EX, indicating excessive hardness. | ||
| View original record | X38574 wd. C. Hs. ------- BY/MB/H. 5. 7. 22. RECEIVED JUL HS 1922 RE CHASSIS 1-EX. ROAD SPRINGS. ------------------------------- Hs. has handed to us a portion of one of the road springs off the above… | ||
| Scan143 | Letter concerning the replacement of a faulty front spring plate for Chassis 1-EX. | ||
| View original record | V38574 By. from Wd. c. to Hs. c. to GC/Dn Wd6/NJ2.8.22. Re Chassis 1-EX. Road Springs. In reply to yours By/M8/H5.7.22, we are just in receipt of a letter from Jonas Woodhead & Sons Ltd. stating that… | ||
| Scan144 | Test data for Woodheads rear road springs showing weight applied and released. | ||
| View original record | X3854 Mr. Hives. from GWH. 16.3.23. REAR ROAD SPRINGS - WOODHEADS. 2200 lbs. 10 leaves. Weight applied. | Weight released. ------------------------------------------------ 1/2 | 469 | 427 1 | 812 |… | ||
| Scan145 | The dispatch of front and rear springs to the stores. | ||
| View original record | To BP. from Hs. c. to Wd. c. to Mr. Chatwin. X3854 Hs2/LC21. 8.23. We are sending into the Stores :- 1 Woodhead 2100 lbs. rear spring. 1 Firths 2100 " " ". 1 Woodhead 950 " front spring. 1 Firths 950… | ||
| Scan146 | Clearance measurements between the tube and rubber buffer on a 4.EX car. | ||
| View original record | Mr. Hives from GWH. X3854 30.8.23. Clearance between tube and rubber buffer on 4.EX car with present Woodheads springs fitted - shock absorbers slacked off is :- N.S. 6⅜" O.S. 7 5/16". GWH. | ||
| Scan147 | High percentage of front spring breakages on the 40/50 postwar chassis and communications with the supplier. | ||
| View original record | [Handwritten top left] R. [crossed out] c. GJ. c. Hs. [Handwritten top centre] X3854 [Typed top right] BY6-P6.11.23. 40/50 CHASSIS. FRONT SPRINGS. Whilst not wishing to unnecessarily worry you at this… | ||
| Scan148 | Report comparing prewar and postwar spring breakages, fractures, and manufacturing processes. | ||
| View original record | BY6-P6.11.23. contd. - 2 - thoroughly well controlled, and in addition worked closely to pyrometer readings. One other point which I discovered early on in the postwar program was that Messrs.… | ||
| Scan149 | Proposal to increase the strength of front springs to reduce breakages for both home and colonial service. | ||
| View original record | BY6-P6.11.23. contd. - 3 - It seems to me that we could materially affect the position in regard to breakages without seriously affecting the riding of the car, by putting up the strength of front… | ||
| Scan150 | The dispatch and testing of new front spring plates made from Silico Manganese steel for the 40/50 chassis. | ||
| View original record | HK Hs. ✓3854 By Unrequest needed BY2-P30.1.24. 40/50 CHASSIS. FRONT SPRINGS. I have just received a note from Messrs. Woodhead in which they inform me that they have despatched four main plates with… | ||
| Scan151 | Receipt and testing of experimental Silico-Manganese steel road spring plates from Messrs. Woodhead & Sons. | ||
| View original record | To Hs. X3854 BY/EM2/ML4.2.24. RE ROAD SPRINGS. Please receive herewith 4 Experimental main plates (painted red) ex Messrs. Woodhead & Sons. These are made from Silico-Manganese steel and have been… | ||
| Scan152 | Load diagram for a Woodhead's rear spring used on 40/50 HP models, complete with clips and hoops. | ||
| View original record | X38548 LOAD DIAGRAM OF WOODHEAD'S REAR SPRING 40/50 H.P. SPRINGS SPRINGS COMPLETE WITH CLIPS & HOOPS LOAD ON SPRING. CWTS. DEFLECTION OF SPRING FROM FREE POSITION NORMAL POSITION. DOTS INDICATE ACTUAL… | ||
| Scan153 | Load diagram for a Woodhead's front spring for 40/50 HP models, showing load vs. deflection. | ||
| View original record | X3654 WOODHEAD'S LOAD DIAGRAM OF FRONT SPRING. 40/50 H.P SPRINGS. SPRINGS COMPLETE WITH CLIPS. LOAD ON SPRING. CWTS. NORMAL POSITION. DEFLECTION OF SPRING FROM FREE POSITION. | ||
| Scan154 | Collection and despatch of Woodheads Springs for a 40/50 HP chassis. | ||
| View original record | Hs. C. to By. C. to Wor. V3854 Wd/Dnl/BH5.9.24. Woodheads Springs Please note that 4 Front Springs for 40/50 HP. Chassis were collected early this morning from the Midland Station, and placed in… | ||
| Scan155 | The bump testing of Woodheads road springs. | ||
| View original record | R.R. 493A (40 H) (EL 42 12-7-23). J.H., D. EXPERIMENTAL REPORT. Expt. No. X3854 REF: Hs4/LG11.9.24. To R. from Hs. c. to CJ. BJ. c. to RG. H. c. to DA. BY. c. to Wor. ROAD SPRINGS. Y9410 Woodheads 12… | ||
| Scan156 | Compromise on front spring design, discussing stiffness, plate thickness, and testing. | ||
| View original record | X3854 To CJ. from R. c. to BJ. BY. HS. EP. DA. PN. S E C R E T. R1/M13.9.24. E. A. C. FRONT SPRINGS. X.9410 X.2838. I have compromised between Sales, BY's and our views in the following way :- So far… | ||
| Scan157 | Delivery schedules and specifications for front springs from suppliers Woodhead and Firth for the 'U' Series 40/50 HP Chassis. | ||
| View original record | RP. from Wd. c. to Wor. c. to By. c. to Hs. c. to CO/Sm. X3854 Wd11/WJ22.9.24. Front Springs for "U" Series - 40/50 HP. Chassis. In partial reply to EP1/H17.9.24, we expect that a fortnight hence, 6th… | ||
| Scan158 | Receipt and allocation of new front axle springs from Jonas Woodhead & Sons Ltd. | ||
| View original record | Wor. from Wd. c. to By. c. to Hs. c. to Oc/Bn. X3854 Wd10/NJ/22.9.24. Secret. EAC.111 - Front Axle. Referring to Wor9/M18.9.24, I am pleased to be able to announce the receipt of a letter from Jonas… | ||
| Scan159 | An urgent requirement for clips, sheaths and gaiters to proceed with testing Woodhead springs for a Press Demonstration car. | ||
| View original record | X3857 To BY. from Hs. c. to Wor. c. to RHC. Hs2/LG29.9.24. f9410 K3028 ROAD SPRINGS. We have received some of the latest 12 1/2% thin leaf Woodhead springs. We cannot proceed with the tests on these… | ||
| Scan160 | Criticisms of a cabriolet's springing, identifying issues with friction and stiffness. | ||
| View original record | To Hs. from R. c. to CJ. BY. DA. E. Y3854 R3/M6.10.24. CRITICISMS ON THE SPRINGING OF THE CABRIOLET BROUGHT TO WW+ BY X.9410 HS. ON 3.10.24. X.2628 If there is any complaint about the springing of… | ||
| Scan161 | Modifications to the thinleaf type front springs based on a sample from Woohead. | ||
| View original record | To BY. from R. c. to CJ. HS. c. to DA. E. K3854 R2/M6.10.24. RE. FRONT SPRINGS. THINLEAF TYPE. X.2628 _X.9410._ With regard to the sample front spring (Woohead) brought here by Hs. last Friday, and… | ||
| Scan162 | 10,000-mile test log for a Landaulet 9.P.K. with stiffer front road springs. | ||
| View original record | X3854 10,000 MILES TEST ON WOODHEADS 20% STIFFER FRONT ROAD SPRINGS. Landaulet 9.P.K. Chateauroux. FRANCE. weight of car:- 2ton 7cwt 1qr. in running order. DATE Days Total Days Total Days Total Days… | ||
| Scan163 | Test report for a 10,000-mile trial on Woodhead's 20% stiffer front road springs for an open touring car. | ||
| View original record | 10,000 MILES TEST ON WOODHEADS 20% STIFFER FRONT ROAD SPRINGS. 9,364 Miles previously completed on 9.PK. Open Touring Car 98.MX Date. | Days Miles. | Total Miles. | Day's Average Speed. | Total… | ||
| Scan164 | 10,000-mile test report on Woodheads' stiffer springs for an Open Touring car, model 98 NK. | ||
| View original record | X9410 10,000 MILES TEST ON WOODHEADS' 12.5% STIFFER SPRINGS. Open Touring car - 98 NK. | Date. | Day's run. | Total miles run. | Day's Average Speed. | Total Average Speed. | Day's Petrol Cons: |… | ||
| Scan165 | Analysis of a bump test on Woodhead springs, detailing failures and suggesting design improvements. | ||
| View original record | To HS. } To BY. } FROM R. c. to CJ. DA. Handwritten: Y3857 RE. BUMP TEST. X.1331 X.2628. We are very pleased to hear that the latest test shews that the Woodhead springs - all thin leaves - are… | ||
| Scan166 | Continued memo discussing modifications to a tapering component. | ||
| View original record | CONTD :- -2- be slightly shortened, or better still, the tapering end should be as long as possible. DA. has instructed slight modifications by nearly similar reasoning. R. | ||
| Scan167 | The successful 10,000-mile test of Woodhead 20% stiffer front springs for 40/50 HP cars. | ||
| View original record | K3854 To R. from Hs. c. to CJ. BJ. c. to E. BA. c. to BY. Wor. c. to PN. EP. Hs10/LG31.10.24 FRONT SPRINGS FOR 40/50 HP. CARS. L9941 The 10,000 miles test has been completed in France in connection… | ||
| Scan168 | Reporting the mileage status of ongoing tests on Woodhead front road springs in France. | ||
| View original record | X3854 To BJ. from Hs. Hs3/LG5.11.24. TESTS OF FRONT ROAD SPRINGS IN FRANCE. f911D Referring to BJ12/H4.11.24. The last report in connection with the Woodhead 12½% springs was that they had completed… | ||
| Scan169 | On the results of tests of Woodhead front road springs in France. | ||
| View original record | To B.J. from Hs. Y3854 Hs1/LG10.11.24. TESTS OF FRONT ROAD SPRINGS IN FRANCE. The Woodhead springs 12½% stiffer than standard have now completed 4,000 miles running with no failure. Hs. | ||
| Scan170 | The road testing of 12 1/4% thin leaf Woodhead springs in France. | ||
| View original record | R.H. 493A (SOH) (D.A. 652 20-3-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs3/LG17.11.24. K/3854 To R. from Hs. c. to CJ. BJ. c. to E. DA. c. to BY. Wor. RG. TESTS WITH 12¼% THIN LEAF WOODHEAD… | ||
| Scan171 | Requesting the return of a standardisation sheet for four-wheel brakes using Woodheads springs. | ||
| View original record | X3854 To CJ. and BJ. from Hs. Hs7/LG20.11.24. STANDARDISATION SHEET. FOUR WHEEL BRAKES. X9940 We should be pleased if you will kindly return the signed standardisation sheet for 4-wheel brakes using… | ||
| Scan172 | Tests on 12 1/2% thin leaf Woodhead springs in France following consistent failures. | ||
| View original record | To CJ. from Hs. X3854 Hs8/LG20.11.24. TESTS WITH 12 1/2% THIN LEAF WOODHEAD SPRINGS IN FRANCE. X9418 (crossed out) X1331 Referring to the attached. As a result of the consistent failures of the bottom… | ||
| Scan173 | Covering memo arranging a meeting to discuss a copied memo concerning a Woodhead spring replacement programme. | ||
| View original record | Y3854 To BY. from Wor. " Hs. " " (Hs. is struck through) " Wd. " " (Wd. is struck through) SECRET. Wor6/M22/11/24. The following is copy of a memo I have received from CJ. I suggest we meet on Monday… | ||
| Scan174 | 10,000-mile test of Woodhead thin leaf springs in France. | ||
| View original record | R.R. 493A (20H) (D.A. 662 20-2-24) F.H.D. X/S854 EXPERIMENTAL REPORT. Expl. No. 9410 REF. HsS/LG30.11.24. To R. from Hs. c. to CJ. BJ. c. to RU. E. c. to DA. BY. c. to Wor. TESTS WITH 12 1/4% THIN… | ||
| Scan175 | Comparison of a front spring fitted to a Springfield chassis with a Woodhead spring. | ||
| View original record | To R. from Hs. c. to CJ. BJ. c. to RG. E. c. to DA. BY. c. to Wor. Y3854 HS1/LG21.7.25. £39.00 SPRINGS FOR THE AMERICAN RR. CHASSIS. Attached is a comparison of a front spring fitted to the… | ||
| Scan176 | Particulars and comparison of front springs for American Chassis No S-167-MK. | ||
| View original record | PARTICULARS OF FRONT SPRINGS OF AMERICAN CHASSIS No S-167-MK. FURNISHED BY THE R.R. OF RIGHT HAND SIDE FRONT SPRING. THE COLUMN OF SMALL FIGURES REFER TO A SIMILAR SPRING MANUFACTURED BY WOODHEAD… | ||
| Scan177 | Blank document page with a company stamp. | ||
| View original record | ROLLS-ROYCE LIMITED PHOTOSTAT 20 JUL 1925 DERBY. | ||
| Scan178 | Inquiring about the manufacturing accuracy and heat treatment of American springs compared to Woodhead springs. | ||
| View original record | To Hs. from DA. X3854 DA1/M24.7.25. AMERICAN SPRINGS. X.3900 X.3838 The information you give in your Hs1/LG21.7.25. is what we were hoping to get, but in addition we should like to know whether the… | ||
| Scan179 | Preparation of drawings for Woodhead Self Shock Absorbing Springs for the 40/50 HP chassis. | ||
| View original record | By from Wd. c.to Hs. X3854 Wd2/NJ24.11.25. 40/50 HP.Chassis - Front Road Springs. Referring to By/C2/H18.11.25, we are in receipt of a letter from Jonas Woodhead & Sons Ltd. stating they are preparing… | ||
| Scan180 | Letter and drawings for 40/50 HP Chassis front road springs from Jonas Woodhead & Sons Ltd. | ||
| View original record | By. from Wd. [strikethrough] c. to Hs. X3854 Wd2/NJ27.11.25. 40/50 HP. Chassis - Front Road Springs. I confirm mine Wd2/NJ24.11.25 and hand you (By) herewith a letter from Jonas Woodhead & Sons Ltd.,… | ||
| Scan181 | The testing and failure of special front springs from Messrs. Woodheads. | ||
| View original record | To Wd. from Hs. c. to BY. X3854 Hs5/LG23.2.26. WOODHEADS FRONT SPRINGS. X8772 With reference to the special front springs which we recently received from Messrs. Woodheads which have 4 rebound rings… | ||
| Scan182 | Test report on the failure of Woodhead's 8-clip type front road springs. | ||
| View original record | X3854 23.2.26 Bumper test on Woodheads front road springs - 8 clip type. Woodhead front spring Fg193 (1150 lbs) fitted to the OFF side ran 26 1/4 hrs. before breaking. The break occurred in the top… | ||
| Scan183 | Testing special Woodhead front road springs. | ||
| View original record | Expl: Report Expl: No. Ref. Hs2/LG25.2.26. X8654 To R. from Hs. C. to C.J. BJ. C. to RG. BY. (Struck through) C. to RG. BY. C. to Wer. (Struck through) FRONT ROAD SPRINGS. X8410 We have beentesting… | ||
| Scan184 | Graph and data tables comparing the load vs. deflection of standard and special front springs. | ||
| View original record | Y-Axis: DEFLECTION IN INS X-Axis: LOAD IN LBS Graph Labels: STANDARD FRONT SPRING GRADUAL COMPRESSION STANDARD FRONT SPRING BUMP EXTENSION WOODHEAD SPECIAL FRONT SPRING BUMP EXTENSION WOODHEAD SPECIAL… | ||
| Scan185 | Blank document with a red ink stamp from the Print Room. | ||
| View original record | ROLLS-ROYCE LIMITED. PRINT ROOM 23 FEB. 1926 DERBY. | ||
| Scan186 | Graph and data tables comparing the deflection under load for a standard front spring versus a Woodhead special front spring. | ||
| View original record | STANDARD ROLLS ROYCE FRONT SPRING [100LBS] TABLE 1: STANDARD SPRING CAMBER OF SPRING IN INCHES COMPRESSION | LOAD (LBS) + 2.706 | 0 + 2.156 | 175 + 1.656 | 336 + 1.156 | 489 + .656 | 633 + .156 | 812… | ||
| Scan187 | The reverse of a document showing a handwritten reference number and a red ink date stamp. | ||
| View original record | X3854 ROLLS-ROYCE LIMITED. PRINT ROOM 23 FEB 1926 DERBY. | ||
| Scan188 | The breakage of Woodhead's 8 Clip Type front springs. | ||
| View original record | X3854 Woodhead's Front Springs - 8 Clip Type. POSITION & WEIGHT | LENGTH OF RUN | WHERE BROKEN | BRINELL 1. O.S. 1150 lbs | 26 1/4 HRS | Rear portion top leaf. 1.875" from central bolt. being just… | ||
| Scan189 | Test report on Woodhead front springs, evaluating durability and anti-wobbling characteristics. | ||
| View original record | Hs. File X3854 Hs/RnL/LG. 26.2.26. WOODHEAD FRONT SPRINGS. We have carried out tests with these springs :- (1) For durability on the bump. (2) For anti-wobbling attributes on the road. (1) So far the… | ||
| Scan190 | Preliminary impression on the performance of new springs compared to standard ones, specifically regarding tyre types and brake torque. | ||
| View original record | -2- somewhat better for high pressure tyres than the standard springs but with balloons, are slightly worse. As regards strength for resisting brake torque. Our preliminary impressions are that these… | ||
| Scan191 | The chemical analysis and physical properties of Silico-Manganese steel for Axle Springs. | ||
| View original record | BT. from ROY. c. to Hs. X3854 ROY6/MG1.3.26 Axle Springs Woodheads are now using, and have done so for the last two years of so, Silico Manganese for their Axle Springs in place of their previous… | ||
| Scan192 | Differences in effect and construction between special Woodhead springs and conventional front road springs. | ||
| View original record | To Hs. from DA. X3854 DA1/M16.3.26. FRONT ROAD SPRINGS. X. 8410 X. 3854 With reference to your Hs2/LG25.2.26., referring to tests on some special Woodhead springs fitted with rebound leaves, on… | ||
| Scan193 | Returning broken front springs to Woodhead's for repair and fitting of new leaves. | ||
| View original record | Hs. X.3854 Wd/Dnl/BH30.3.26. Front Springs Self Shock Absorbing Type. During the early part of this month you sent to Order Office certain Plates removed from Springs of the above type, and which had… | ||
| Scan194 | And comparing different suspension schemes, including front springs, rebound leaves, and shock dampers. | ||
| View original record | To BY. DA. Hs.) FROM R. E. LE CANADEL. c. to CJ. BJ. X3854 R2/M30.3.26. FRONT SPRINGS X.3854 X.3803 X.5410 I do not consider BY's scheme would work in practice, but that we ought to test Woodheads… | ||
| Scan195 | Request to Messrs. Woodhead to manufacture a pair of front springs to a specific experimental specification. | ||
| View original record | To Wd. from Hs/Rm. [Handwritten: V3854] Hs/RmL/LG8. 4. 26. WOODHEAD SPRINGS. [Handwritten: V3854, X8410] Will you please ask Messrs. Woodhead to make for us a pair of front springs to the following… | ||
| Scan196 | The failure of Woodhead springs during testing and a request for their return to the manufacturer for replacement. | ||
| View original record | Wd/DN. from Hs. c. to Mt. 43854 Hs5/LG16.4.26. WOODHEAD SPRINGS. We are sending into the Stores - 7 Woodhead springs of the latest type fitted with rebound leaves which have failed on the bumping rig.… | ||
| Scan197 | Request for a modified pair of rear springs for an experimental car, with specifications for them to be weaker and have an increased camber. | ||
| View original record | To Wd. from Hs/Rm. X3854 Hs/Rml/LG21.4.26. WOODHEAD ROAD SPRINGS. X3854 Attached are particulars of a rear springs which we have removed from a car in the Experimental Dept. We wish you to obtain a… | ||
| Scan198 | Specification sheet for a spring, detailing its dimensions and load characteristics. | ||
| View original record | SPRING SPECIFICATION. Initial camber ................. 6.75" Load to flat camber ............ 950 lbs. Rating ......................... 140 lbs./1" Maximum bump to be experienced ..... 2.45". Length,… | ||
| Scan199 | Hand-drawn sketch with dimensions for a spring eye and rebound clip on a spring. | ||
| View original record | No 4 LEAF .625 .800 1.25 1.875 WIDTH AT SPRING EYE DETAILS OF SPRING EYE REQD 1.00 .750 No 1. LEAF REBOUND CLIP ON SPRING | ||
| Scan200 | Results of torsion tests on front springs. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. 13854 Hs/Rm3/LG10.8.26. TORSION TESTS - FRONT SPRINGS. 13854 74429 We have carried out a considerable number of tests to determine the… | ||
| Scan201 | Blueprint showing the contour of a Woodhead special spring main leaf under torsion and load. | ||
| View original record | SPRING CONTOUR UNDER TORSION SHACKLE ANGLE BEFORE TORSION 21° AFTER 18.5° WITH 1100 LBS LOAD WITH TORQUE GIVING 6° LEAN T SHOWING THE SHAPE ASSUMED BY A WOODHEAD SPECIAL SPRING MAIN LEAF UNDER THE… | ||
| Scan202 | Blank document with a 'Print Room, Derby' receiving stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 10 AUG 26 DERBY. | ||
| Scan203 | Graph plotting the results of torsion tests on various front springs, showing angle of rotation against torque. | ||
| View original record | TORSION TESTS ON FRONT SPRINGS ANGLE OF ROTATION TORQUE IN 1000 LBS - IN. Graph Labels: DA, A4, B4, B3, A3, D3 LEGEND: A = FIRTH'S SPRING 1100 LBS TOTAL LENGTH 43.5 INS. B* = WOODHEADS EQUAL SPRING… | ||
| Scan204 | The reverse side of a document or photograph with a Print Room receipt stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 10 AUG 26 DERBY. 31 | ||
| Scan205 | Comparing reversed and rebound leaf springs fitted to Lancia and Bentley vehicles. | ||
| View original record | To R. from Hs/Rm. c. to BJ. Wor. c. to RG. E. c. to DA. BY. X3854 Hs/Rml/LG10.8.26. X4048 X2628 REVERSED AND REBOUND LEAF SPRINGS. X.3854 X3805 We have been making some comparisons between the… | ||
| Scan206 | Graph showing the relationship between deflection and total spring load for Lancia reversed leaf springs. | ||
| View original record | LANCIA REVERSED LEAF SPRINGS. 3 REVERSED LEAVES REVERSED LEAVES DEFLECTION INS. TOTAL SPRING LOAD LBS EXTN COMPRN INTERNAL FRICTION APPROX 150 LBS | ||
| Scan207 | Blank document page featuring a red ink date stamp from the Derby office. | ||
| View original record | ROYCE, LIMITED P. ROOM, 10 AUG 26 DERBY. | ||
| Scan208 | Performance graph showing the compression versus load for a Woodhead Special Spring D. | ||
| View original record | WOODHEAD SPECIAL SPRING D. 4 REBOUND LEAVES & CLIPS COMPRESSION - INCHES TOTAL SPRING LOAD LBS. REBOUND LEAVES GRADUAL LOADING " UNLOADING INTERNAL FRICTION APPROX = 25 LBS. | ||
| Scan209 | Severely faded document with a red rectangular received stamp. | ||
| View original record | [Main text is illegible due to severe fading]. Text from stamp: LIMITED ROOM. 10 AUG 26 DERBY. | ||
| Scan210 | Design of riveted-on road spring clips for the 40/50 and 20 HP models. | ||
| View original record | To BY. from DA. c. to BJ. Hs. X3854 DA1/M3.5.27. ROAD SPRINGS (CLIPS) X8410 X1333 X5440 With reference to the riveted-on clip which you are asking for, R. wishes to make one which exactly resembles… | ||
| Scan211 | Design, testing, and production of riveted spring clips. | ||
| View original record | To BY. Hs. from R. DA. c. to BJ. +3854 R/M6.5.27. SPRING CLIPS. X.1333 X.4429 Z.8804 X.3854 X3803 There is no doubt that we can rivet on a clip at least equal to that used by Lemoine and the… | ||
| Scan212 | Test results and proposed modifications for a rebound leaf spring. | ||
| View original record | To BY. from Hs/Rn. X3854 Hs/Rn3/LG13.5.27. REBOUND LEAF SPRING. X3854 +4268 We got very good results as regards life from the Woodhead rebound reaf spring. Since we have reported to R. however he has… | ||
| Scan213 | The testing of special Woodhead front springs with rubber pads, including bumper test results and weight comparisons. | ||
| View original record | To BY. from Hs/Rn. c. to Roy. c. to DA. Y3854 Hs/Rn1/LG24.7.28. SPECIAL WOODHEAD FRONT SPRINGS. X248 Messrs. Woodhead put up a pair of front springs to us having rubber pads between the leaves. We… | ||
| Scan214 | Spring durability, manufacturing methods, and solutions for squeaking. | ||
| View original record | contd :- -2- Recent tests have shewn us very clearly that the method of manufacturing the plates seems to be the predominating factor in the durability of the spring. We are sending these springs into… | ||
| Scan215 | Blueprint of a 'Woodhead Special' leaf spring detailing break locations and rubber inserts. | ||
| View original record | WOODHEAD SPECIAL OFFSIDE BROKEN AT || MARKS. NEARSIDE BROKEN AT X MARK. 1" DIA RUBBER INSERTS AT R. EQUIDISTANT 2" FRONT END SPRING GAPES BADLY AT RUBBER INSERTS Dimensions: 1/4" 1" 2" 5" 7" 7 1/2" 10… | ||
| Scan216 | Blank document page with a Print Room stamp. | ||
| View original record | ROLLS-ROYCE, LIMITED PRINT ROOM, 26 JUL 1928 DERBY. | ||
| Scan217 | Letter from Jonas Woodhead & Sons Ltd. regarding the testing of special laminated springs. | ||
| View original record | X3854 JONAS WOODHEAD & SONS. LTD., TRADE MARK MANUFACTURERS OF LAMINATED SPRINGS FOR ROLLING STOCK ROAD OR RAIL REGD. OFFICE AND WORKS: KIRKSTALL ROAD, LEEDS. LONDON OFFICE: 17 VICTORIA STREET, S.W.1.… | ||
| Scan218 | Letter to J. Woodhead & Sons Ltd. regarding spring deflection and rebound testing. | ||
| View original record | 73854 c. to ROY. Expl: Dept: HS/Rm5/LG: 20th. Aug. 1928. Messrs. J. Woodhead & Sons Ltd., Kirkstall Rd., LEEDS. Dear Sirs, With reference to your letter of the 16th.inst. ref. THS/HB. The deflection… | ||
| Scan219 | Letter from Jonas Woodhead & Sons Ltd. regarding test results for springs with rubber inserts. | ||
| View original record | Y3854 JONAS WOODHEAD & SONS. LTD., TRADE MARK REGISTERED. MANUFACTURERS OF LAMINATED SPRINGS FOR ROLLING STOCK ROAD OR RAIL REGD OFFICE AND WORKS: KIRKSTALL ROAD, LEEDS. LONDON OFFICE: 17 VICTORIA… | ||
| Scan220 | Design of road springs, including plate ends, clips, and types like cantilever and semi-elliptic. | ||
| View original record | BY. Hs. from DA. 43854 DA3/M2.10.28. ROAD SPRINGS. X.3854 X.7410 X.8410 R. agrees to returning to the Woodhead clip in order to get the ends of the spring plates as flexible as possible. He thinks… | ||
| Scan221 | Proposal to return to the Woodhead clip for road springs and an associated design issue. | ||
| View original record | DA. c. Hs. X3854 BY6/G.10.10.28. ROAD SPRINGS. Referring to N. Sch. 2734, I am afraid the proposal to return to the Woodhead clip involves us in a real difficulty, but we/will have to endeavour to… | ||
| Scan222 | Receipt of sample 20 HP low rating type Axle Springs from Jonas Woodhead & Sons for testing. | ||
| View original record | Rmx 3854 To Hs. from ROY. c. to BY. ROY/HW2/MG12.8.32 We have received this morning from Messrs. Jonas Woodhead & Sons, of Leeds, one set of 20 HP. Axle Springs, low rating type. These have been sent… | ||
| Scan223 | Letter to Jonas Woodhead & Sons regarding the testing of their road springs and issues with lubricant. | ||
| View original record | X3854. Hs/Les.2/MA. November 5th, 1932. Messrs. Jonas Woodhead & Sons Ltd., Kirkstall Road, Leeds. Dear Sirs, We have been testing a set of your road springs on one of our chassis. At the end of the… | ||
| Scan224 | Test report comparing Woodhead low rating road springs against standard Firths springs on a 25HP bumper chassis. | ||
| View original record | X3854 X4479 By. From Hs/Les. c. to E. c. to Wor. c. to Roy. Es/Les.1/MA.5.11.32. WOODHEAD ROAD SPRINGS ON 25HP. BUMPER. We have tested a set of Woodhead low rating road springs on the 25HP. bumper… | ||
| Scan225 | Lubricant issues with rear springs and plans for testing new Woodhead springs. | ||
| View original record | -2- Hs/Les.1/WA.5.11.32. Cont'd. Up to the end of the running this lubricant was oozing out of the spring. On dismantling we found that the rear ends of the rear springs were slightly dry. We do not… | ||
| Scan226 | Letter from Jonas Woodhead & Sons about a new design for spring plate ends to aid lubrication and prevent squeaking. | ||
| View original record | X3854 JONAS WOODHEAD & SONS, LTD., TRADE MARK REGISTERED. MANUFACTURERS OF LAMINATED SPRINGS FOR ROLLING STOCK ROAD OR RAIL REGD OFFICE AND WORKS: KIRKSTALL ROAD, LEEDS. LONDON OFFICE: 17, VICTORIA… | ||
| Scan227 | Design and manufacturing specifications for experimental Woodhead springs. | ||
| View original record | X3854. O.C. [Strikethrough] c. E. [Strikethrough] c. Hs/LeS. c. BY/HHB. [Strikethrough] BY.6/G.7.11.32. WOODHEAD SPRINGS. ------------------ In confirming the position in regard to Woodhead springs,… | ||
| Scan228 | Request to order a set of 4 low rating Peregrine road springs from Messrs Woodhead. | ||
| View original record | Y3854 ROY/MS. Hs/Les.2/KT. 28.12.32. PEREGRINE ROAD SPRINGS. X4027' Will you please order a set of 4 low rating Peregrine road springs from Messrs Woodhead. 2 off, type F.100095 - 600 lbs. 2 off, type… | ||