Rolls-Royce Archives
| Identifier | Entry | ||
| scan 001 | Article from 'The Autocar' magazine detailing the process and experiences of applying an aluminium finish to a car. | ||
| View original record | THE AUTOCAR, March 4th, 1911. 281 Useful Hints and Tips How to Produce Aluminium Finish. By "Page." WITH the cult of the light two and four-seated car, there is a growing tendency on the part of the… | ||
| scan 002 | To Mr. Johnson concerning the composition and use of Aluminium Alloy in vehicles. | ||
| View original record | R.R. 238A (100M) (W 705. 1.8.11) G. 1826. N3/B51011. 5th October 1911 Mr. Johnson 5-10-11 With reference to the attached, re Aluminium Alloy, this matter was receiving our attention before we received… | ||
| scan 003 | Newspaper clipping detailing a method for soldering aluminium using a special flux and solder from Alu-sol Manufacturing Co. | ||
| View original record | The Autocar. 15. x. 12. Soldering Aluminium. 1091 A special flux and solder for use with aluminium has been brought forward by the Alu-sol Manufacturing Co., Worcester Street, Wolverhampton. The… | ||
| scan 004 | Article from 'The Autocar' discussing the composition and analysis of aluminium pistons. | ||
| View original record | THE AUTOCAR, November 28th, 1914. Aluminium Pistons. Their Exact Composition. The Results of an Analysis. SOME months ago we first drew attention to the fact that certain go-ahead makers in France and… | ||
| scan 005 | To Mr. Royce suggesting the adoption of aluminium pistons, citing W.O. Bentley's successful use of them. | ||
| View original record | To R. from EH. c. to J. x.1506. X.2448 Wor/EH2/L8.7.15. X.3400 X.1506. RE ALUMINIUM PISTONS. I am sending to Mr. Royce an aluminium piston, I have borrowed this from Lieut. Bentley from the Admiralty,… | ||
| scan 006 | Benefits of aluminium pistons and suggesting they be trialled. | ||
| View original record | Work To R. from EH. Copy to J. Wor/EH2/L8715. July 8th. 1915. Re Aluminium Pistons. I am sending to Mr Royce an aluminium piston. I have borrowed this from a Lieut. Bentley from the Admiralty, who has… | ||
| scan 007 | Urgent adoption of aluminium pistons for a 12-cylinder aero engine, comparing three potential designs. | ||
| View original record | COPY. X.1506. URGENT AND IMPORTANT. COPY. 10/11 To Na. from R. R2/IB14815. Copy to J. " " Wor. for EH. 17815 August 14th. 1915. " " By. X.1506. Re Aluminium Pistons. Thank you for sending the memo re… | ||
| scan 008 | Engine knocking issues and theorising that cold weather expansion of a single aluminium piston could cause major failures. | ||
| View original record | COPY. R.R. 255 a (400 T) (S C. 836 18-2-16) G. 1546 To Wor. for EH from R. c. to J. c. to EY. c. to E. c. to Na. R6/B251115. November 25th 1915. RE - ALUMINIUM PISTONS. Referring to yours of November… | ||
| scan 009 | Broken connecting rod, proposing an experiment with a larger piston to investigate the cause. | ||
| View original record | -2- To Wor . for EH. from R. R6/B251115. The other breakdown I refer to is the broken connecting rod, which was probably due to running in the reverse direction, but might have been due to the piston… | ||
| scan 010 | Change in piston design to a three-ring arrangement for Eagle, Falcon, and Hawk engines. | ||
| View original record | To By from R. c. to J. c. to Na. c. to Wor.for Eh. c. to EF. c. toE. RE PISTONS. Mr Hives has decided that three rings would be preferable to the two-ring arrangement in the upper part of the piston,… | ||
| scan 011 | Overheating and detonation issues caused by a new lightened piston design. | ||
| View original record | Overheating X2748 It is a fact that the new lightened piston is inclined to cause detonations worse than the old heavy type. This is due to the piston being much thinner and consequently does not… | ||
| scan 012 | Engine overheating issues in Australia, requesting piston rings and discussing potential solutions. | ||
| View original record | For to EP: " " Mr.Hives. AUSTRALIA. CP12/M3516. Overheating. ----- I have received a report from Peat, dated 18/3/16 which reads as follows:- "I beg to confirm herewith my cable to you of even date,… | ||
| scan 013 | From BY to EH regarding the proposed clearances for a new aluminium piston for cars. | ||
| View original record | To EH. from BY. X2748 2nd August, 1916. By7/G2816. RE ALUMINIUM PISTON FOR CARS. Referring to Mr. Royce's latest sheet asking us to produce an aluminium piston for the car, I am sending you herewith a… | ||
| scan 014 | Drawing of an aluminium piston for a standard chassis, with tables for suggested clearances. | ||
| View original record | MR HIVES SUGGESTED CLEARANCES D.O. SUGGESTED CLEARANCES .015" .008 .006 .006 .005" PARALLEL TAPER PARALLEL ALUMINIUM PISTON FOR STANDARD CHASSIS RMAAB | ||
| scan 015 | Performance of various aluminium pistons and delaying standardisation until new designs are tested and approved. | ||
| View original record | X.2448 To By. from R. c. to Hs. c. to EP. c. to J. X.2748. - RE ALUMINIUM PISTONS FOR THE CAR. X.682. R3/W189B6. Regarding aluminium pistons for the car I understood that 7-CA was fitted with our… | ||
| scan 016 | Fitting, testing, and subsequent adjustment of aluminium pistons in a car engine. | ||
| View original record | R.R. 288A (400 T.) S.C. 539. 15-5-16; G. 1546. X2748 Handwritten note: Comm. Briggs to take the car for tomorrow's race. Clear & will be discussing with him. R from EH. c. to J c. to Sy c. to W'O'R… | ||
| scan 017 | Cylinder re-grinding, piston fitting, clearance measurements, and engine performance tests. | ||
| View original record | - 2 - Before fitting these pistons the cylinders were all re-ground, in order to make them all equal, - they were actually .015" oversize. This was Commander Briggs' request; he also made the request… | ||
| scan 018 | Engine performance after fitting new pistons, comparing horsepower, compression, and piston knock. | ||
| View original record | - 3 - The H.P. of the engine, if anything, appeared to improve with running, since the engine was first fitted with the original aluminium pistons. The original pistons were Zephyr type, and I was… | ||
| scan 019 | Specification sheet for different types of multi-ringed pistons for aero and chassis applications. | ||
| View original record | H.M. Sta. A (570 H) S.D. 442. 9-2-17) G. 1905 To X 2749 EFC3/T31.7.17. MULTI-RINGED PISTONS Aero. X. 2209A - Seven Ringed Pistons (Low compression). X. 2209B - " " " (High " ). Chassis. X. 2369A -… | ||
| scan 020 | Extract discussing Mr. Royce's insistence on using aluminium pistons and the engineering concerns regarding potential piston knock. | ||
| View original record | X.2748. Extract from EH3/LG7.10.18. X.2748T RE - AFTER-THE-WAR CHASSIS. X.2748. Another important point, is that Mr. Royce is very emphatic as regards using aluminium pistons. We, from our experience,… | ||
| scan 021 | Unsatisfactory performance of Zephyr type pistons and the issue of piston knocks for an after-the-war chassis. | ||
| View original record | X.2565. X.2748 EH1/LG.221018. To R. from EH. c. to CJ. c. to E. c. to Ey. c. to Da. c.to EP. X.2762 X.762. X.3014 X.3082 X.2565 X.3129. X.2748 X.2369 RE AFTER-THE-WAR-CHASSIS We understand it has been… | ||
| scan 022 | Fitting Truffault-style shock absorbers to the After-the-war-chassis. | ||
| View original record | H.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. Comtd:- Officials who have to sell the cars, might give their opinions whether piston knocks can be accepted. X.762+ (2) SHOCK ABSORBERS 7-CA. is… | ||
| scan 023 | Design of a die-cast piston for the X.3400 chassis. | ||
| View original record | To Eh. from E. c. to EY. c. to DaS c. to EFC. --------- E1/G261.18. X.3400 - RE CHASSIS PISTON We attach herewith confirmation of our telegram of even date, concerning the above, also the sketch… | ||
| scan 024 | Technical memo detailing the specifications for new experimental pistons and connecting rods for testing on chassis 7-CA. | ||
| View original record | Contd:- Four pressure rings are fitted, the lowest of these being a scraper, which should deliver its oil into a groove of sufficient capacity with large draining holes. The piston pin bosses are… | ||
| scan 025 | Transmittal note for a copy of document LEC. 1016 regarding a Die Cast Chassis Piston. | ||
| View original record | R.R. 235a (200 T) (S.D. 408 28-4-17.) Bm. 2/156/12 To Des section From BY. To BA. To WH. To R. To EFC. 29th. October, 1918. BY3/T291018. X. 3400A We attach herewith one copy of Lec. 1016 - Die Cast… | ||
| scan 026 | Cross-section design drawing for a die-cast chassis piston with annotations. | ||
| View original record | Die cast with heat well drawn centre & side piece collapsed. Suitable taper on diagonal webs. 8th Ring is in standard position LEC-1016 DROP RINGS .125 TO GET ENOUGH ROOM FOR TOP RING PIN .450 .225… | ||
| scan 027 | Cover sheet with stamps indicating receipt by the print room and another department. | ||
| View original record | EX. 29 OCT 1917 RECEIVED ROLLS-ROYCE, LIMITED PRINT ROOM. 28 OCT. DERBY | ||
| scan 028 | Modifications to the aluminium piston design to address piston knocks. | ||
| View original record | X.3400 To Eh from R. c. to CJ. --------------- X.3402 X.3400. RE ALUMINIUM PISTON FOR CAR With reference to piston knocks, I think your suggestion is quite a reasonable one, but I fear we shall have… | ||
| scan 029 | Continuation of a document outlining the advantages of a new piston design. | ||
| View original record | Contd:- pistons are new, and we are sure from our own observations that we can considerably reduce the tendency to knock in the new piston, and by leaving a well lubricated surface the wear should be… | ||
| scan 030 | Experiences with fitting aluminium and Zephyr pistons, including issues with clearances, piston knock, and performance over mileage. | ||
| View original record | X3400 R. from EP. Extract from Ep3/F141118 c. to CJ. c. to EH. c. to EY. X.3400/2. With reference to your memo R1/C3D1018, referring to aluminium pistons for cars, a copy of which I attach, I am very… | ||
| scan 031 | Extract detailing the testing of new aluminium pistons for the 40/50 HP chassis. | ||
| View original record | X 2748 X.2748 X.3400 Extract from R4/G261118. 1000 - 40/50 H.P. CHASSIS (9) PISTONS. It is assumed that we are testing aluminium pistons made in Mr. Hall's alloy, of the special design lately sent… | ||
| scan 032 | Extract discussing the production strategy for pistons and connecting rods on the 45/50 HP chassis. | ||
| View original record | X.2748 Extract from B'6/P291118. RE 1000 45/50 H.P. CHASSIS. (9) PISTONS. As the pistons have always been a very considerable source of trouble, until we have definitely thrashed out a new type, and… | ||
| scan 033 | The fit of the gudgeon pin in the piston for a standard chassis. | ||
| View original record | To Mr. Milles from BY/Shn. c.c. to bpc. c.c. to Mr. Coverley. BY/Siml/AL.31218. 3rd Dec. 1918. RE STANDARD CHASSIS - PISTON & CONNECTING ROD. X.3400.A With reference to the above, will you please… | ||
| scan 034 | Instruction to test a die-cast aluminium piston with both poor and good fit piston pins. | ||
| View original record | To EH. from E. c. to DA. c. to EY. c. to EFC. 5th December 1918. E4/G51218. X.3600A - RE DIE CAST ALUMINIUM PISTON FOR CHASSIS. Referring to the plain trunk diagonal web type of piston recently… | ||
| scan 035 | Notes from a meeting with Mr. Royce discussing design changes to various engine and chassis components. | ||
| View original record | R.H. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X2748 Extract from EH1/LG16.12.18. The following notes were taken during Mr. Wormald's and my visit to Mr. Royce:- X.3473. FRONT ENGINE CASES. As… | ||
| scan 036 | Cancelling instructions for a pre-war chassis piston and urging a report on an experimental aluminium piston. | ||
| View original record | R.R. 238 s (200 T) (S.E. 527. 21-2-18) G. 2129 X2745 December 20, 1918. Mr Shelton from BY. c. EH. BY/JH6/P201218. RE CHASSIS PISTON. Please cancel our instructions for the chassis piston, that is,… | ||
| scan 037 | Potential causes and solutions for piston knocks, including lubricants, ignition timing, and piston design. | ||
| View original record | H.R. 235a (500/T) (S.D. 40s. 26-4-17.) Hm. 2/156/13. To EH. from R. Copy to CJ. " " BN. " " DA. " " EFC. X. 2748 RE PISTON KNOCKS. I believe the lubricant will have an enormous effect on the knocking… | ||
| scan 038 | Extract detailing alterations to the 500 40/50 chassis regarding aluminium pistons. | ||
| View original record | X.2748. Extract from EH1/LG17.12.18. Alterations to 500 40/50 Chassis. (2) Aluminium pistons of the die cast type with the gudgeon pin centres made to suit the standard length connecting rod. | ||
| scan 039 | Extract detailing alterations to the 500 40/50 Chassis, specifically the positioning of piston rings. | ||
| View original record | R.R. 25M s (500 T) (S.E. 587. 21-2-18) G. 2129 X. 2748. Extract from EH1/LG17.12.18. Alterations to 500 40/50 Chassis. (6) Piston with rings much lower down. You will realise that all these points… | ||
| scan 040 | Instruction to test a die-cast aluminium piston with a specified gudgeon pin slack. | ||
| View original record | To Mr. Hives from BY/Shn. c. to M. c. to EFC. c. to RHE. ------ RE STANDARD CHASSIS - DIE CAST ALUMINIUM PISTON E.17022 - X.3400 A Further to our instructions re the above, will you please try a… | ||
| scan 041 | Alterations to be made to the 40/50 HP chassis. | ||
| View original record | R.R. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/158/13. To Wor. from E. c. to EY. c. to DA. c. to EH. c. to EP. X.3400 8th January 1919. E2/G8119. RE 40/50 H.P. CHASSIS Please find attached a… | ||
| scan 042 | Index of alterations for the 40-50 HP present type chassis. | ||
| View original record | To BY) BA) from R. EH) c. to CJ. c. to WOT c. to EP. 18th December 1918. R7/G181218. RE ALTERATIONS TO 40-50 H.P. PRESENT TYPE CHASSIS OBJECT:- The object of this report is to setout as far as… | ||
| scan 043 | Piston design policy, including proposed tests for various new aluminium piston types. | ||
| View original record | To HY. DA & EH from R. -4- R7/G181218. Contd (2) PISTONS. X.2784 Our policy with regard to the treatment of the piston question should be somewhat altered. We must endeavour to give pistons more… | ||
| scan 044 | Parts for testing a new piston design for a standard chassis. | ||
| View original record | R.R. 235A (500 T) (S.D. 408. 26-4-17.) Bm. 2/158/13. To Mr. [illegible] from BY/Bhn. c. to M. C. to Mr. Beverley. c. to EFC. ---------------- BY/Bhnl/ML.16119. 16th January 1919. RE STANDARD CHASSIS -… | ||
| scan 045 | Progress of fitting experimental pistons to a shop car. | ||
| View original record | K.2748 To EH. from Wor. C. to Mr. Coverley. 16th. January 1919. Wor9/T16119. Have we been able to fit 1731,(our shop car) with a set of experimental pistons? Mr. Royce asked us when we were last with… | ||
| scan 046 | The shortening of a chassis connecting rod by machining a new one. | ||
| View original record | 933 e(200 T) B.Y. 103, 25-10-18) G. 2244 X.2748 January 20. 1919. BYB/P20119. H. From BY. e. C.W. e. H.I. c. EFC. e. Mr Hives. X.3400 CHASSIS - RE SHORTENING CONNECTING ROD. Referring to your memo… | ||
| scan 047 | Comparative tests on aluminium pistons and short connecting rods following a reduction in the Eagle engine program. | ||
| View original record | H (200 T) (S. Y. 163 25-10-18 G. 2244 X2748 January 20. 1919. B.H. from BY. c. EFC. c. Worr. c. BP. BY2/P20119. X3400 CHASSIS. RE ALUMINIUM PISTONS & SHORT CONN RODS. In view of the intimation we have… | ||
| scan 048 | The design of short connecting rods for the 40/50 chassis, comparing white metal bearings to brasses for ease of repair. | ||
| View original record | H.R. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. To R. from EH. c. to U. c. to E. c. to By. c. to Wor. c. to Da. X.3400 EH1/LG/7219. X.3429.-SHORT CONNECTING RODS FOR 40/50 CHASSIS. X.3400. We… | ||
| scan 049 | Issues with white metal on aero engines and the comparative benefits of using brass bushes. | ||
| View original record | -2- EH1/LG7219. Contd. Oil groove. With the very best supervision and inspection we are frequently on aero engines having epidemics of the white metal leaving the steel. All the white metalling done… | ||
| scan 050 | Fitting new type aluminium pistons for the X.2638 40/50 HP chassis, focusing on gudgeon pin issues. | ||
| View original record | W.H. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. To R. from EH. c. to E. c. to BY. c. to Da. X.3400A EH2/LG8.2.19. 8th February 1919. X.3400[PRE struck through] NEW TYPE ALUMINIUM PISTONS FOR… | ||
| scan 051 | Potential issues of gudgeon pins turning within aluminium piston recesses. | ||
| View original record | Contd. -2- EH2/LG8.2.19. If we use the easier fitting gudgeon pin there is nothing with the type of locking on these car pistons to prevent them turning round. We do not anticipate any harm would come… | ||
| scan 052 | Mr. Royce's remarks on various 40/50 HP chassis piston designs. | ||
| View original record | To BY. from E. c. to EH. c. to Da. c. to EFC. g................ X.3400 X.2748 RE 40/50 H.P. CHASSIS PISTONS. Referring to your memo BY/RBS/P.4.2.19., I have gone over these pistons with Mr Royce, and… | ||
| scan 053 | Technical memo discussing engine compression ratios, piston materials, and detonations for the 40/50 chassis. | ||
| View original record | To R. from EH. c. to CJ. c. to E. c. to Ey. c. to Da. EH1/LG18.2.19. X.2748 RE 40/50 CHASSIS X.790. X.2748. X.2768 X.682 Previous to the war we used to make cars with high and low compression. The… | ||
| scan 054 | Modifications and tests on carburetter and camshaft for the 7 CA model, including issues with petrol quality. | ||
| View original record | H.H. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. -2- EH1/LG18.2.19. Contd. The carburetter on 7 CA has also been made larger. The low speed throat has been altered but the high speed throat has… | ||
| scan 055 | Mr. Royce's remarks on various 40/50 HP chassis piston designs. | ||
| View original record | X 2748 To BY. from E. c. to EH. c. to Da. c. to EFC. X.340 X.2748 RE 40/50 H.P. CHASSIS PISTONS. Referring to your memo BY/RB5/P.4.2.19., I have gone over these pistons with Mr Royce, and the… | ||
| scan 056 | Design points for a 40/50 HP chassis die-cast piston with high and low piston pins. | ||
| View original record | H/R 235A (500 T) (S.D).408. 28-4-17.) Bm. 2/156/13. To EY. from E. C. to EFC. C. to EH. 6th March 1919. E1/G6319. X.3400B/C RE 40/50 H.P. CHASSIS - DIE CAST TYPE PISTON WITH HIGH AND LOW PISTON PINS.… | ||
| scan 057 | Design amendments for pistons and requesting a revised blueprint. | ||
| View original record | RR 235 s (200 T) (S.F. 143. 25-10-18. G. 2214) -2- E1/G6319. Contd. To BY. from E. (6) No webs are shewn in the interior of the pistons on the sections, and the outside elevation shews them dotted.… | ||
| scan 058 | Design modifications for connecting rods on a 40/50 chassis. | ||
| View original record | To By. from E. c. to EFC. X 3429 E 2/G6.3.18. X.3400-RE CONNECTING RODS - 40/50 CHASSIS. In reply to your memo By16/T28219, would you kindly note the following points in connection with scheme… | ||
| scan 059 | Tests of aluminium pistons for the 40/50 Chassis X.3400 regarding engine knock issues. | ||
| View original record | To R. from EH. c. to CJ. c. to E. c. to BY. c. to Da. EHL/LG25.3.19. X 3429 ALUMINIUM PISTONS FOR 40/50 CHASSIS X.3400. We have carried out a number of tests with the aluminium pistons (the latest… | ||
| scan 060 | The successful testing of short connecting rods on the 40/50 chassis. | ||
| View original record | To R. from EH. c. to CJ. c. to E, c. to Ev. c. to Da. EH4/LG31.3.19 X.3429 - RE SHORT CONNECTING RODS ON 40/50 CHASSIS [handwritten: X3400P.] The short connecting rods on the 40/50 chassis are… | ||
| scan 061 | Recommendation to standardise the short connecting rods for the 40/50 chassis. | ||
| View original record | R.R. 235a (500 T) (S.D. 40s. 28-4-17.) Bm. 2/156/13. To R. from EH. c. to CJ. c. to E. c. to By. c. to Ba. X 3400 EH4/LG/7.4.19. RE SHORT CONNECTING RODS FOR 40/50 CHASSIS X.3400D. X.3429. We… | ||
| scan 062 | Standardisation document for short connecting rods for the 40/50 chassis, to eliminate piston knocks. | ||
| View original record | R.R. 755 (5 H) (S F. 621. 2-3-19) G. 2361. STANDARDISATION of CHASSIS PARTS. Description of Parts. Short Connecting rods for 40/50 Chassis. Origin. The elimination of Piston Knocks. Experimental Test… | ||
| scan 063 | Continued discussion on managing customer complaints regarding piston knocks. | ||
| View original record | EH4/L.G7.4.19.Contd. removed all traces of piston knocks, but we have every confidence that we can satisfy all but the most fastidious customers. This is the class of customer we have complaints from… | ||
| scan 064 | Test report on short connecting rods (X.3400) after successful bench and road tests. | ||
| View original record | EH/AT17.11.19. X.3400.-SHORT CONNECTING RODS. These rods have been run on the Bench Test for 100 hours and have shown no sign of failure. They have now completed 10,000 miles Road Test and have given… | ||
| scan 065 | New piston design for the 40/50 chassis, noting differences from tested versions and advising caution before machining. | ||
| View original record | To BY. from EH. EH6/LG9.4.19. 9th. April 1919 RE 40/50 CHASSIS. X.2748 We notice that the piston which has been instructed as standard has the rings 1/8" lower down than the pistons we have tested,… | ||
| scan 066 | Standardisation proposal for a short connecting rod for the 40/50 Chassis. | ||
| View original record | R.R. 785. (5 H) (V.V. 472. 30.1.14) G. 6319. STANDARDISATION of CHASSIS PARTS. Description of Parts. Short Connecting Rod for 40/50 Chassis. Origin. The elimination of piston knocks. Experimental Test… | ||
| scan 067 | Continued discussion on customer complaints regarding knocks from the cast-iron piston. | ||
| View original record | Contd. -2- EH4/LB7.4.19. class of customer we have complaints from even with the cast-iron piston as regards knocks. EH. | ||
| scan 068 | Test report on short connecting rods after a 100-hour bench test and a 10,000-mile road test. | ||
| View original record | EH/AT17.11.19. X.3400.- SHORT CONNECTING RODS. These rods have been run on the Bench Test for 100 hours and have shown no sign of failure. They have now completed 10,000 miles Road Test and have given… | ||
| scan 069 | Instruction to halt the machining of chassis pistons pending a report on recent modifications. | ||
| View original record | c. to Mr. Hives. X.2748 To Mr. Hives from BY/JH. c. to Mr. Shelton. c. to Mr. Mills. BY/JH5/T11/4/19. RE CHASSIS PISTON. With reference to the chassis pistons which have just been instructed for 1000… | ||
| scan 070 | Requesting the modification of chassis pistons E.17764 and 17792 by removing material from the crown. | ||
| View original record | X2748 To Mr. Cheetham from BY/JH. c. to Mr. Swift. c. to Mr. Shelton. c. to Mr. Hives. c. to Mr. Coverley. BY/JH2/T29/4/19. CHASSIS PISTON. Will you please arrange to modify the chassis piston E.17764… | ||
| scan 071 | Instructing to proceed with casting 100 sets of altered chassis pistons, but to hold grinding pending sizes from the Experimental Department. | ||
| View original record | X2748 To Mr. Mills. To Mr. Swift. To Mr. Shelton. To Mr. Swift for Mr. Cheetham. To Mr. Hives. BY/JH12/AT1/5/19. RE CHASSIS PISTON. Further to our memo in which we reduce the dimension from the centre… | ||
| scan 072 | New piston design defects, including a thick skirt and long ring pins, with modifications suggested by Mr. Hives and Mr. Royce. | ||
| View original record | R.R. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X.3400. Extract from E6/G1.5.19. (14) PISTONS - Mr. Hives brought a sample of the new piston with low position of piston pin to West Wittering.… | ||
| scan 073 | Request for a sample cylinder to investigate a complaint about the length of the piston ring stop. | ||
| View original record | H.R. 253 a (200 T) (S.F. 103, 25-10-18) G. 2244. EH. from BY. C. Mr Shelton. X2748 BY3/P9/5/19. CHASSIS - PISTONS. ------------------ Referring to Mr Royce's memo E6/G1519 with reference to the length… | ||
| scan 074 | Modification of 40/50 HP chassis pistons with concave crowns to minimise piston knock. | ||
| View original record | X.2448 To DA. from E. Copy to CJ. " " BN. " " EH. " " BY. " " EEC COPY. E5/G1/5.5.19. X.3559 RE 40/50 H.P. CHASSIS PISTONS FOR LONG CONNECTING RODS FOR REPAIR WORK' 2448 X. 3559 With reference to the… | ||
| scan 075 | With a diagram detailing recommended clearances for chassis pistons. | ||
| View original record | To EY. From EH. EH1/LG19.5.19. 19th. May 1919. X.3400 RE CHASSIS PISTONS. We recommend the following clearances should be used on the chassis pistons:- .018" taper .008" taper .004" [Signature] M 2307… | ||
| scan 076 | Testing policy and the standardization of a short connecting rod for the 40/50 HP chassis. | ||
| View original record | To C.J. from Bn. C.c. H.H. C. EFC. X.3429 Bn2/P31.5.19. RE STANDARDIZATION SHEET - X.3400D - SHORT CONNECTING ROD FOR 40/50 HP. CHASSIS. With reference to the attached standardization sheet and your… | ||
| scan 077 | 10,000-mile standard test, chassis shortages for testing, and proposing flexibility in mileage for Mr. Royce and his staff. | ||
| View original record | -2- Bn2/P31.5.19. to be passed on the general running of the engine, and you will agree that for this purpose 20 hours was sufficient. I also must draw your attention that if the 10,000 miles were… | ||
| scan 078 | Mileage of short connecting rods on chassis 49-GB and 1.E.X. | ||
| View original record | To Bn. from EH. EH2/LG7.6.19. X.3400D. X.5429 With reference to attached, the short connecting rods on 49-GB have now run 4350 miles. We have another set of these rods fitted to chassis 1.E.X. This… | ||
| scan 079 | The urgent need for a satisfactory aluminium piston design for repair cars. | ||
| View original record | X.2748 To BN. from R c.to CJ. EH. Wor. EPC. COPY R3/G9.6.19. X.2748 RE PISTONS X.3559. It is of the utmost importance that we get a satisfactory design of aluminium piston for repair cars promptly My… | ||
| scan 080 | Completing a 10,000-mile test on Short Connecting Rods to get a Standardization Sheet signed. | ||
| View original record | [Handwritten] X.3400D [Handwritten] X.3429 E.H. from Bn. [strikethrough]Copy to CE[/strikethrough] CE E.F.C. Bn7/W13.6.19. As you know I have been corresponding with Mr. Johnson over his objection to… | ||
| scan 081 | Recommending a modification for aluminium pistons on the 40/50 chassis due to bearing issues around the gudgeon pin hole. | ||
| View original record | To BY. from EH. c. to Bm. EH1/LG21.6.19. X.3400 - FOR ALUMINIUM PISTONS FOR 40/50 CHASSIS The pistons which have been run on the first production chassis, shew that they have been bearing hard locally… | ||
| scan 082 | Suggestion to proceed with machining aluminium pistons for the 40/50 chassis. | ||
| View original record | x.2748 [Struck through: By.] from En. Copy to EH. Bn5/W23.6.19. RE ALUMINIUM PISTONS FOR 40/50 CHASSIS. With reference to EH1/LG21.6.19 I think this suggestion should go forward. Will you please… | ||
| scan 083 | Expansion and necessary clearances for aluminium and cast iron pistons. | ||
| View original record | R.R. 226a (100 T) (S.E.S. 576, 16-4-19) G. 2354 To R. from EH. c. to CJ. c. to BN. c. to E. c. to BY. c. to DA. RE PISTONS. X.2748. Attached herewith is a chart which shews the expansion on different… | ||
| scan 084 | Hand-drawn sketch showing dimensional measurements in inches for a component. | ||
| View original record | R.R. 235 s (200 T) (S.F. 103, 25-10-18) G. 2244 010" 006" .004" 003" .002" EH. | ||
| scan 085 | Heat expansion test results for Cast Iron and Aluminium pistons. | ||
| View original record | 27.6.19. Heat Expansion Test on Cast Iron Pistons E.4237. Temp. Dia. at Across Gudgeon Right angles Height at Height at rt. crown. Pin. to GP. G.P. angles to G.P. 18°C 4.4905" .0 4.496" .0 4.895" .0… | ||
| scan 086 | Piston expansion, favouring aluminium pistons and requesting calculations on the risks of tight pistons. | ||
| View original record | To EH. from R. c. to CJ. c. to Da. R16/G30.619. X.2748 - RE PISTONS. Thank you for your memo (EH2/LG27/6/19) with reference to the expansion of pistons. It seems quite as well to know what the… | ||
| scan 087 | To halt the grinding of aluminium pistons for the 40/50 chassis due to unsatisfactory clearances. | ||
| View original record | To BY from EH. c. to Dn. c. to Sft. EH1/LG11.8.19. 11th. Aug. 1919. PISTONS FOR 40/50 CHASSIS. X.2448 We consider the Works should hold up grinding any more aluminium pistons for the car. The pistons… | ||
| scan 088 | Arrangements for testing cylinders and pistons for Paris Show Cars and production chassis. | ||
| View original record | X2748 E.H. C. to Wor. [struck through] C. to Dn. [struck through] EP/T3/F15.8.19. PARIS SHOW CARS. Re. Pistons for Production Chassis. With reference to arrangements made this morning, it is… | ||
| scan 089 | Road test report on chassis 1.EX detailing engine performance, overheating issues, and a seized piston. | ||
| View original record | X8340-0 Bn5/W28.7.19. contd. -5- Chassis 1.EX. Pistons. ------------------------------------- there is as much power as one could possibly want under any condition. The acceleration is very good… | ||
| scan 090 | To halt the grinding of aluminium pistons for the 40/50 chassis due to unsatisfactory clearances. | ||
| View original record | COPY. To By. from EH. C. to Bn. Sft. X 3400 EH1/LG11.8.19. 11th. Aug. 1919. PISTONS FOR 40/50 CHASSIS. We consider the Works should hold up grinding any more aluminium pistons for the car. The pistons… | ||
| scan 091 | Engine knocking issues with aluminium pistons on standard production cars. | ||
| View original record | To R. from EH. c. to C.F. c. to H. c. to E. c. to Da. c. to EP. ALUMINIUM PISTONS ON STANDARD CARS. X.2748 We find from the average of a number of Production Chassis that the tendency for knocks when… | ||
| scan 092 | Agreeing that production chassis can be delivered with piston knocks, providing they are not manifest below 50°C, and requesting standard piston clearance details. | ||
| View original record | EH. c to wor. [crossed out] c to Br. [crossed out] X2748 EP/T4/F19.8.19. ALUMINIUM PISTONS FOR PRODUCTION CHASSIS. With reference to your EH3/LG18.8.19, we conclude from this that it is definitely… | ||
| scan 093 | Sketch detailing satisfactory piston clearances for the 40/50 chassis. | ||
| View original record | To BY. From EH. c. to BN+ EH5/LG19.8.19. 19th. Aug. 1919. RE 40/50/CHASSIS. X-2748 With reference to the Pistons for the 40/50 chassis below is a sketch which gives the piston clearances we have found… | ||
| scan 094 | The production strategy for aluminium pistons for the 40/50 chassis. | ||
| View original record | To whom from EH. c. to BYt EH1/LH20.8.19. 20th. Aug. 1919. RE ALUMINIUM PISTONS for 40/50 CHASSIS. X.2748 I consider that the Works should only produce sufficient aluminium pistons to keep them going… | ||
| scan 095 | Improvements for Car 1 EX, focusing on piston knocking and lubricating oil issues. | ||
| View original record | To EH. from R. c. to CJ. c. to BN. c. to DA. c. to Br. c. to EFC! X!2748 R3/G21.8.19. RE CAR 1 EX. X.2565. X.740. X.682. X.2748. Mr. Elliott is preparing a general report on this car dealing with… | ||
| scan 096 | From R to EH discussing solutions for piston knocks through improved lubrication systems. | ||
| View original record | To EH. from R. -2- crankchamber has oil of sufficient body, we would like the surfaces of the pistons to become oiled before the engine is put under load. I believe that if we could do this, much of… | ||
| scan 097 | Engine piston compression, lubrication performance, and running characteristics. | ||
| View original record | Contd. -3- R3/G21.3.19. succession. This depended on speed only. I noticed that 1 EX. was particularly tight in compression, shewing that the pistons and valves held the gas extremely well. I am very… | ||
| scan 098 | Standards for piston knocks and the challenges with piston clearances on different vehicle models. | ||
| View original record | To R. from EH. c. to CJ. c. to BN. c. to E. c. to Da. c. to Wor. EH2/LG22.8.19. 22nd. Aug. 1919. X. 2748. RE PISTON KNOCKS. X.2748. X. 2565. We realised when we let you have 1.E.X. that it was a very… | ||
| scan 099 | Piston knock issues with aluminium pistons and the resulting customer policy. | ||
| View original record | Contd. X. 2748. 2. of clearance so that it is impossible to expect that these slack pistons will not knock. Everyone on the Technical side at least, knew that with aluminium pistons we should have to… | ||
| scan 100 | Ongoing work to cure piston knocks and the plan to fit new pistons to car 49-GB. | ||
| View original record | Contd. X. 2748. 3. the present piston metal. Since the first chassis* were on test and we realised that piston knocks were manifested, we have been working continuously on pistons. Our aim has been to… | ||
| scan 101 | Explaining how to reduce piston knocks in a cold engine by using late ignition. | ||
| View original record | To R. from EH. c. to CJ. c. to BN. c. to E. c. to PN. c. to C. EH2/LG25.8.19. PISTON KNOCKS. X.2748. A way to greatly reduce piston knocks when an engine is cold is to run with late ignition during… | ||
| scan 102 | Instruction to limit stock levels of standard and high compression piston castings due to imminent design changes. | ||
| View original record | R.R. 136a (200 T) (S.F.) 674. 22-5-19 G. 2876 x2748 BY/JHS/H. 26. 8. 19. HS Sft Mr.Nesterton. En Mr.Shelton EH RE ALUMINIUM PISTONS CHASSIS. Will you please instruct the works that not more than 250… | ||
| scan 103 | Design rationale for piston ring placement on 40/50 HP engines to reduce knocking. | ||
| View original record | To EH. from E. c. to CJ. c. to BN. c. to EFC. E2/G26.8.19. X 2748 RE 40/50 H.P. PISTONS X.2748 Referring to your report in which you say that the set of pistons on 49-GB which did not knock, had the… | ||
| scan 104 | Extract listing new parts, including shorter connecting rods, for the 40/50 chassis. | ||
| View original record | R.R. 235 a (250 T) (S.F. 674 22-5-19) G. 2376. X. 3400. X.3429. Extract from EH1/LG27.8.19. X.3400 The following is a list of new parts which have been fitted to the 40/50 chassis, which we are now… | ||
| scan 105 | List of new parts fitted to the 40/50 chassis compared to the pre-war version, specifically mentioning Aluminium Pistons. | ||
| View original record | X.3400. Extract from EHL/LG27.8.19. The following is a list of new parts which have been fitted to the 40/50 chassis, which we are now mak- ing compared with 40/50 HP. chassis we made previous to the… | ||
| scan 106 | Standard allowances for fitting pistons to prevent piston knocks. | ||
| View original record | R R. 285 m (80 T) (S.F. 674 23.6.19) G. 1376 To EH from R. c. to CJ. c. to Bn. c. to EP. c. to Wor. c. to EFC. R6/G27.8.19. RE PISTONS. - X.2748 I would like it to be thoroughly understood that I have… | ||
| scan 107 | Advantages of pistons with low-down rings. | ||
| View original record | To EH. from R. Copy to CJ. " " BN. " " EFC. X. 2748. RE PISTONS. With reference to the pistons with rings low down, it was intended that the piston above the ring should fit the cylinder as closely as… | ||
| scan 108 | Proposal to test extra cylinder lubrication to address piston knock under light load. | ||
| View original record | X. 2748. To EH. from R. Copy to CJ. " " EFC. R1/G29/8/19. X. 2748. X. 3437. RE EXTRA LUBRICATION. I propose testing 1 EX. with the extra cylinder lubricating oil always on. I shall be glad if you will… | ||
| scan 109 | Query regarding modifications to the grinding size of chassis pistons. | ||
| View original record | X2748 R R 235 a (200 T) (S F 100 25-10-18) G 2244 BY/JH2/H. 29. 8. 19. EH. C.E. [crossed out] En. RE CHASSIS PISTONS I understand from the Works that you are modifying the grinding size of chassis… | ||
| scan 110 | Investigation into the causes of piston knocks, identifying alignment and lubrication as the primary factors. | ||
| View original record | To R. from EH. c to CJ. c. to BN. c. to E. c. to BY. c. to Da. EH4/LG29.8.19. 29th Aug. 1919 X. 2748. RE PISTON KNOCKS. We have been investigating to find the reason why on the majority of our car… | ||
| scan 111 | Piston knocking issues and the practice of intentionally tilting pistons to resolve them. | ||
| View original record | H.H. Contd. STR. 15-4-19: C. 2554 2. EH4/LG29.8.19. against the cylinder walls, it is sufficient if it is tilted so that most of the clearance is taken up. We have now definately cured five or six bad… | ||
| scan 112 | Investigation into methods for overcoming engine knocks, including piston modifications and different alloys. | ||
| View original record | 3. Contd. We are still investigating to see how the out-of-alignment in other directions besides tilting, affect knocks. We have tried numerous other things to try and overcome knocks. We took a… | ||
| scan 113 | Experiments with piston designs, clearances, and lubrication oils to reduce engine knocking. | ||
| View original record | Contd. 4. EH4/LG29. 8.19. We could not find any appreciable advantage with this. We have another set of pistons in another alloy which have not yet been tried. We have also tried the present pistons… | ||
| scan 114 | Investigation into the causes and potential mechanical solutions for engine piston knocks. | ||
| View original record | Contd. 5. EH4/LG29.8.19. proved that if one runs with a definite late ignition, the knocks disappear but no matter how early the ignition is, the knock is still there. We have tried with the ignition… | ||
| scan 115 | Progress on resolving piston knock issues, focusing on lubrication with castor oil. | ||
| View original record | To EH. from R. Copy to CJ. " " BN. " " Da. " " EFC. " " BY. RE PISTON KNOCKS. Thank you for your memo EH&/LG29/8/19 with reference to piston knocks. I am pleased to hear that considerable progress has… | ||
| scan 116 | Running an engine on a single charge of oil and improving the crankcase draining process. | ||
| View original record | R.R. 850 x 200 T. on F. 674 19.5.19/ G. 9376 Contd. 2. of miles we can run the engine on a single charge of oil. In future I am looking into the possibilities of entirely draining the crankcase more… | ||
| scan 117 | Conflict between performance and silence, specifically regarding knocking from aluminium pistons and suggesting a switch to cast iron. | ||
| View original record | To R. From CJ. c. to Ph. c. to W'r. c. to BN. c. to Hs. c. to H. c. to BJ. copy c. to EP. c. to A. c. to Bp. X.2448 CJ12/D2.9.19. My Dear R, I am afraid that there is a danger to the Company luring in… | ||
| scan 118 | Letter from 'CJ' arguing against using aluminium pistons due to a knocking issue, advocating for cast iron pistons instead. | ||
| View original record | - 2 - I am quite sure that we must not introduce into our manufacture pistons which are going to knock, and which we admit will knock, and which will require an educational propaganda behind them in… | ||
| scan 119 | Recommendation of Castrol oil for engines to reduce piston knocks and wear. | ||
| View original record | To EH. from R. Copy to CJ. " " BN. X.2448 R9/G4/9/19. X.1434. X. 2778. X. 3317. RE LUBRICATING OILS AND PISTON KNOCKS. As soon as we have agreed, I propose to circulate the Sales Dept. that we… | ||
| scan 120 | Policy on pistons, engine silence, and reliability versus the issue of piston knocks. | ||
| View original record | R.R. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. To CJ. from R. c. to WCR. c. to PA. c. to BJ. c. to EH. c. to PN. c. to HN. c. to EP. c. to HM. c. to Da. c. to BY. X.2748 R3/G5.9.19. RE PISTON… | ||
| scan 121 | Technical memorandum discussing the issue of piston knocking, comparing cast iron and aluminium pistons, and outlining causes and potential cures. | ||
| View original record | Contd. -2- We never pressed for the acceptance of pistons which knock when the engine is at a satisfactory working temperature, and I do not see the slightest reason from this point of view to revert… | ||
| scan 122 | Piston knock, its causes, potential cures by misaligning the connecting rod, and the suggestion to educate drivers. | ||
| View original record | Contd. -3- R3/G5.9.19. of the small end of the connecting rod. So that it would appear that in the past we have been throwing away the most perfectly made pistons and retaining the pistons and… | ||
| scan 123 | Preventing piston knock by improving lubrication and suggesting the use of Castrol oil. | ||
| View original record | Contd. -4- R3/G5.9.19. knock during the warming up period - surely this is not unreasonable ? You will see therefore that my impression is that it would be more harmful to go back to our dangerous… | ||
| scan 124 | Reducing engine wear and piston knock, including fitting a thermostat and considering future modifications. | ||
| View original record | Contd. -5- R3/G5/9/19. extra cost in the neighbourhood of .015d. per mile, that is, about 60 miles for 1d. In return for this one gets less piston knocks, a sweeter running engine, less wear and tear,… | ||
| scan 125 | Experiments investigating the cause of piston knocks in test cars. | ||
| View original record | X.2748. EHL/LG20.9.19. To R. from EH. c. to CJ. c. to BN. c. to E. c. to Da. c. to EP. X.3400. X.2748. X.3651. EXPERIMENTS IN CONNECTION WITH PISTON KNOCKS. There are a number of cars on test which… | ||
| scan 126 | Gudgeon pin alignment measurements and an oiling test on an experimental engine. | ||
| View original record | Contd. -2- EH1/LG20.9.19. CYLINDERS. | | 1 | 2 | 3 | 4 | 5 | 6 | |---|---|---|---|---|---|---| | Twist on Gudgeon Pin | .007" | O.K. | .002" | .004" | .001" | .002" | | Tilt on Gudgeon Pin. | .003" |… | ||
| scan 127 | Experiments to cure piston knock and over-oiling issues in an engine. | ||
| View original record | Contd. -3-3 EH1/LG20.9.19. chassis' with the extra oil on the whole time but in some cases on those cars they have had definite over-oiling sufficient to oil up the plug. X.3651 We are running some… | ||
| scan 128 | Connecting rod deflection tests and an analysis of engine knock sounds. | ||
| View original record | R.R. 250 x 100 T(H.F. Sta. (8-4-19) G. 2354 -4- EH1/LG20.9.19. Contd. LOAD REQUIRED TO DEFLECT RODS. We have measured the load required to deflect a standard connecting rod various amounts. Below are… | ||
| scan 129 | Piston design experiments to eliminate engine knocking. | ||
| View original record | Contd. -5- EH1/LG20.9.19. We found that if we had a piston so that the rubber was on the non-pressure side of the cylinder there was no sign of a knock but if we had the rubber on the pressure side of… | ||
| scan 130 | Satisfactory results of running long pistons to address piston knocks. | ||
| View original record | To R. from EH. c. to CJ. c. to BN. c. to E. c. to Da. EH5/LG22.9.19. X.2748. RE PISTON KNOCKS. We have been running some long pistons of the present design. The results so far are very satisfactoyr.… | ||
| scan 131 | Insulation for lamp connection wiring and potential causes for leaky pistons. | ||
| View original record | Contd. To EH. from H. Care must be taken that some insulation be introduced so that the armouring at the ends of the wires to keep it away from the actual conductors leading into the lamp connections.… | ||
| scan 132 | Issues with chassis 49 GB, covering the engine, pistons, magneto drive, clutch, and dynamo. | ||
| View original record | X.2748. R4/G22.9.19. To EH. from R. Copy to CJ. C " " BN. " " DA. " " EFC. RE CHASSIS 49 GB. X.2631. X.2748. The following is a report giving my impressions of the above chassis:- (1) Harsh engine, I… | ||
| scan 133 | Vehicle component issues including battery electrolyte loss, rear shock absorbers, Castrol lubrication, and cylinder lubrication. | ||
| View original record | To EH. from R. Contd. (7( The battery was found to have lost nearly all its electrolyte in some cells, suggesting some better management at the Works in looking after these cells, as this is the… | ||
| scan 134 | Modifications to piston design, including increasing skirt length and experimenting with spring pressure. | ||
| View original record | To EH. from R, Copy to CJ. " " EN. " " WOR. X.2748 RE PISTONS. R10/G24.9.19. X.3651. X.2748. I am pleased to hear that the longer piston promises to be better. Get the works to run from hand to mouth,… | ||
| scan 135 | Issues with aluminium pistons seizing during dynamometer tests due to reduced clearance. | ||
| View original record | EH. from EP. C. to En. x 2748 Chassis. EP7/F25.9.19. Re. Fitting of Aluminium Pistons. With the present reduced clearance I find that we are having trouble of pistons seizing up during their… | ||
| scan 136 | Fitting of aluminium pistons, pre-war practices for piston knocks, and matching procedures. | ||
| View original record | To EP. from Bn. Copy c. to HS. Bn6/W26.9.19. X 2448 FITTING OF ALUMINIUM PISTONS. With reference to EP7/F25.9.19., will you please ascertain that the pistons to which you refer were made in… | ||
| scan 137 | Acute position and supply issues regarding aluminium pistons. | ||
| View original record | Wor. c. to EH. c. to Sft. c. to Bn. COPY. EP15/F30.9.19. X.2948 RE ALUMINIUM PISTONS. With reference to your memo to Bn, Worll/M30.9.19., we agree that the present position of the aluminium pistons is… | ||
| scan 138 | Challenges of fitting aluminium pistons, balancing piston knock against the risk of seizing. | ||
| View original record | Bn. from EP. c. to HS. Copy. EP4/F30.9.19. I have noted your Bn6/W26.9.19. and have discussed the question of fitting aluminium pistons further with Mr. Hives. The present position is that we cannot… | ||
| scan 139 | Ongoing issues and policy disputes regarding aluminium piston knocks. | ||
| View original record | Chassis To Rn. from Wor. x2748 Worll/M30.9.19. c. to Hs. c. to EP. c. to Sft. re Aluminium Pistons. ------------------ So far as I can see, and judging from conversations I have had with Messrs Hives,… | ||
| scan 140 | Typed document fragment urging for strong efforts to be made for a satisfactory settlement. | ||
| View original record | -2- Worll/M30.9.19. succeeds in stopping real progress. I think strong efforts should be made to arrive at a satisfactory settlement. Ua. | ||
| scan 141 | Difficulty in obtaining aluminium pistons that meet the required specifications. | ||
| View original record | [Handwritten top right: X274S Chassis] Wor. c. to EH. c. to Set. c. to Un. EP15/F30.9.19. RE. ALUMINIUM PISTONS. With reference to your memo. to Bn, Wor11/M30.9.19, we agree that the present position… | ||
| scan 142 | The challenges of fitting aluminium pistons, focusing on the trade-off between piston knock and seizure. | ||
| View original record | COPY. En. from EP. c. to HS. EP4/F30.919. I have noted your Bn6/W26.9.19 and have discussed the question of fitting aluminium pistons further with Mr.Hives. The present position is that we cannot with… | ||
| scan 143 | To stop all work on pistons E.18135/6 for the 40/50 chassis as they are no improvement. | ||
| View original record | x2748 To Mr Hill from BY/Shn. c. to Mr Bib. c. to EH. c. to Mr F. c. to Mr Chetthem. BY/Shn1/ML6.10.19. RE 40/50 CHASSIS - PISTONS. With further reference to memo BY/JH19/H25.9.19.. will you please… | ||
| scan 144 | Recommendations for the standard practice of fitting aluminium pistons. | ||
| View original record | X2748 PY. from EP. c. to EM. c. to EH. c. to Wor. EP8/PS.10.19. 8th. October, 1919. RE. FITTING OF ALUMINIUM PISTONS. In view of the experience we have now had with the latest type clearance aluminium… | ||
| scan 145 | Instructions for checking piston clearances and performing easing to prevent engine seizing. | ||
| View original record | -2- so that there is a gradual blending of the present clearance to the present diameter. This easing should not extend any more than about 2" either way from the centre of the gudgeon pin. No easing… | ||
| scan 146 | Experimental work on engine pistons to avoid knocks or seizing. | ||
| View original record | -3- in order to obtain satisfactory engines. Although I do not expect to entirely eliminate this, I certainly feel that by adopting the above practice we shall reduce it to a minimum. In the meantime,… | ||
| scan 147 | Notice confirming that Die Cast Aluminium Pistons are now standard. | ||
| View original record | R.H. 235a (500 T) (S F. 67) 22-5-19 G 2375 7.10.19. X.3400.-DIE CAST ALUMINIUM PISTONS. These pistons are now standard. RHC. | ||
| scan 148 | Recommendation to modify the piston locking screw design for the 40/50 chassis to prevent distortion. | ||
| View original record | R.H. 235 A (100 T S.F. 575, 16-4-19) G. 2354. To Ds. from EH. c. to H. c. to Ly. c. to Ep. ORIGINAL EM/LGS.10.19. 8th. Oct. 1919. PISTONS FOR 40/50 CHASSIS. X.3400 On the present piston we are using… | ||
| scan 149 | Experiments to reduce piston knocks using an oil-damped cylinder versus a spring. | ||
| View original record | X.2748. To R. from EH. c. to CJ. c. to EN. c. to E. c. to Da. c. to EP. c. to BY. RE PISTON KNOCKS. EH2/LC9.10.19. X.2748. X.3651. We have been experimenting with some standard pistons into which, on… | ||
| scan 150 | Progress with an oil plunger scheme and piston castings to cure engine knock. | ||
| View original record | Contd. -2- EH2/LG9.10.19. when picking up from slow speed on a car. We feel that there are possibilities with this oil plunger scheme. The results so far are that we have been able to cure several… | ||
| scan 151 | Use of a clearance hole for a locking set screw on pistons for the 40/50 chassis to prevent deformation. | ||
| View original record | COPY. To EH. from Da. c. to BN. c. to BY. c. to EP. Da3/CB9.10.19. PISTONS FOR 40/50 CHASSIS. X 3400 In reply to your memo EH4/LG8.10.19., we quite agree that one of the locking set screws should be… | ||
| scan 152 | Method for determining the position of piston knock using a stroboscopic telephone. | ||
| View original record | To Bn. from EFC. c. to EH. c. to Da. x.2748 370H RE METHOD OF DETERMINATION OF POSITION OF PISTON KNOCK IN CYCLE BY MEANS OF STROBOSCOPIC TELEPHONE We have experimented with a view to determining the… | ||
| scan 153 | Tests to resolve piston knock issues using oil pressure and a modified relief valve. | ||
| View original record | R.R. 235a (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. X.2748. To R. from EH. Copy to CJ. " " BN. " " E. " " DA. EH5/LG17.10.19. PISTON KNOCKS. X.2748. X.3651. We have carried out a number of tests with… | ||
| scan 154 | Engine testing to address piston knock by adjusting oil pressure and piston design. | ||
| View original record | H.H. 235a (500 T) (S.D. 408. 28-4-17.) Em. 2/156/13. Contd. -2- EH5/LG17.10.19. plunger more effective, it would give us more oil at a time when the engine badly needs it. Quite apart from piston… | ||
| scan 155 | Testing split pistons, their clearances, and difficulties diagnosing engine knock using a stroboscopic telephone. | ||
| View original record | R.R. 235a (500 T) (S.D. 408. 28-4-17.) Bm. 2/156/13. Contd. -35- EH5/LG1710.19. started up it is very difficult to pick out any knock, what noise there is from the pistons disappears before the car… | ||
| scan 156 | Investigation into piston knocks where dismantled engines showed pistons exceeding the maximum clearance limit. | ||
| View original record | Bn. from EP. c. to EH. X8400 COPY. EP9/F22.10.19. RE PISTON KNOCKS. With reference to the two cars, the engines of which were condemned for piston knocks, on the 20th. inst., on dismantling, I find… | ||
| scan 157 | Recommending new standard instructions for the fitting of gudgeon pins to prevent distortion. | ||
| View original record | R.R. 335 a (100 T) (S.F. 674. 22-5-19) G. 7376 EH. from EP. COPY c. to BY. c. to Bn. EP12/EF23.10.19. RE FIT OF GUDGEON PINS. x 3400 Will you please arrange to issue standard instructions with… | ||
| scan 158 | Benefits of grooving pistons to improve lubrication and recommending it become a standard practice. | ||
| View original record | EH. from EP. c. to Ev. c. to Bh. COPY. X.2448 EP11/F23.10.19. RE LUBRICATION OF PISTONS. X.3651 It is certainly a fact that the more oil we can supply to the pistons, some benefit is always obtained… | ||
| scan 159 | Confirmation of a telegram regarding the effect of short connecting rods on reaction vibrations. | ||
| View original record | CONFIRMATION OF TELEGRAM. X. 3429. 29th October, 1919. X.3400. X.3429. ROYCAR DERBY. BARRINGTON HIVES SUSPECT SHORT CONNECTING RODS INCREASE AMPLITUDE OF REACTION VIBRATIONS CAREFULLY COMPARE WITH… | ||
| scan 160 | Typed copy of a wire to Claude Johnson regarding chassis modifications and engine compression choices. | ||
| View original record | X.3400 Copy to Wor. Da. Hs. EP. By. CK. from Bn. X.2565. X.3400. X.3129. 30.10.19. " CLAUDE JOHNSON MIDLAND HOTEL DERBY. ROYCE WIRES AS FOLLOWS CALCULATIONS SHOW MY FEARS OF YESTERDAY UNFOUNDED stop… | ||
| scan 161 | To Mr. Royce recommending the adoption of aluminium pistons, citing their successful use and weight-saving benefits. | ||
| View original record | To R. from EH. c. to J. X.3400 COPY. WOr/EH2/LS.7.15. RE ALUMINIUM PISTONS. X.1506 (crossed out) X.2448 I am sending to Mr. Royce an aluminium piston. I have borrowed this from Lieut. Bentley from the… | ||
| scan 162 | Origin of aluminium pistons, attributing the idea to Mr. Bentley over Commander Briggs. | ||
| View original record | X.1506. x2748 To CJ. from EH. EH1/4.11.19. X.1506.x274* X.3400. RE ALUMINIUM PISTONS. With reference to your memo CJ16/E3.11.19.m I consider that it was Mr. Bentley who first pointed out ot us the… | ||
| scan 163 | Issue with gudgeon pin locking screws protruding in pistons for the 40/50 chassis. | ||
| View original record | x 2748 BY from H. C. EH. [Struck through] C. ER. [Struck through] EH/LCS.11.19. x2748 PISTONS FOR 40/50 CHASSIS. We have noticed the locking screws for the gudgeon pin, when they are screwed in so… | ||
| scan 164 | The need for higher range oil pressure gauges due to increased engine lubrication. | ||
| View original record | BN. from EP. c. to EH. COPY. EP15/F14.11.19. RE HIGHER OIL PRESSURES. X 3400 In view of the fact that piston knocks are reduced by increased lubrication, we have been working to high oil pressures.… | ||
| scan 165 | Confirmation of a telegram regarding testing piston pin locking screws. | ||
| View original record | CONFIRMATION OF TELEGRAM 14th November, 1919. ROYCAR DERBY. X.3400. HIVES PISTON PIN LOCKING SCREWS TEST WITH ONE ONLY TO ASCERTAIN IF SCREW WEAK OR THE TWO STRAINING AGAINST ONE ANOTHER STOP IF… | ||
| scan 166 | Requesting review and signature on a standardisation sheet for an experiment on short connecting rods. | ||
| View original record | To C.J. from F.H. EH/AT17.11.19. X.3400.-SHORT CONNECTING RODS. Herewith standardisation sheet for the above experiment. Will you kindly remark upon, sign and return at your earliest convenience.… | ||
| scan 167 | Distributing standardisation sheets for short connecting rods. | ||
| View original record | To R. from EH. CJ. Wor. Bn. By. Da. EP. PN. EH/AT21.11.19. X.3400D.- SHORT CONNECTING RODS. Herewith please receive copies of standardisation sheets for the above. This is for your permanent… | ||
| scan 168 | Failure of locking screws for the gudgeon pin and recommending reverting to a previous design. | ||
| View original record | To BN. from EH. X.3400 EH3/LG24.11.19. Attached herewith is a copy of a telegram we have received from Mr. Royce. We suggest that it is advisable to revert back to the quarter locking pin for the… | ||
| scan 169 | Telegram from Royce regarding a test on piston pin locking screws. | ||
| View original record | FROM WEST WITTERING. X. 3400. TO ROYCAR DERBY. HIVES PISTON PIN LOCKING SCREWS TEST WHICH ONE ONLY TO ASCERTAIN IFMSCREW WEAK OR THE TWO STRAINING AGAINST ONE ANOTHER STOP IF SINGLE ONE BREAKS… | ||
| scan 170 | Technical memorandum discussing the performance, faults, and potential improvements of split type pistons. | ||
| View original record | x2748 To R. from Hs.. c. to CJ. c. to BN. c. to E. c. to Da. c. to Wor. c. to EP. ----------- Hs3/LG12.12.19. ----------- X.3732. RE PISTONS. X.2748. ----------- X.3754. ----- Split type Pistons. We… | ||
| scan 171 | Overcoming piston knock, the production delays caused by a Moulders' strike, and the consideration of cast iron pistons. | ||
| View original record | R K. 535 a (100 T) (S'y 846 6-8-19) O. 2460 Contd. -2- Hs3/LG12.12.19. best thing we know of to overcome piston knocks, we think that the design of those pistons, as split pistons, should be the best… | ||
| scan 172 | Abandoning cast iron pistons due to seizure risk, comparing them with aluminium pistons on weight, expansion and engine silence. | ||
| View original record | Contd. -3- Hs3/LG12.12.19. The most definite argument for abandoning the cast iron pistons to was because the risk of seizure was so very great, owing to the fact that in order to avoid piston knocks,… | ||
| scan 173 | The reliability of aluminium pistons versus cast iron, noting disintegration issues experienced by Crossley Co. and Rover Co. | ||
| View original record | Contd. -4- Hs31.G/12.12.19. eventually obtain a silent reliable aluminium piston but we think at the same time that we should not abandon the cast iron piston because there is the remote chance that… | ||
| scan 174 | Copy of a telegram from Mr. Royce discussing piston design choices for mass production. | ||
| View original record | X.2748. COPY OF TELEGRAM RECEIVED TO-DAY FROM MR. ROYCE. To Wor. from Bn. To Hs. " To EP. " To Da. " Copy to Ck. To:- ROYCAR, DERBY. X.3754. X.2748. X.3715. Date:- 19.12.19. BARRINGTON CONSULT WITH… | ||
| scan 175 | Testing of various piston materials and designs, such as aluminium, cast iron, and Zephyr split types. | ||
| View original record | X.2448 R1/G22.12.19. To EN.) " Hs.) from R. " CK.) X.2748. RE PISTONS. X.3754. We cannot see any advantage in leaving aluminium unless for excessive wear or disintegration, but if we have substantial… | ||
| scan 176 | Typed letter discussing modifications to piston design, including the use of springs and scraper rings. | ||
| View original record | Contd. x.3776. -2- R1/G22.12.19. We have lately thought that if a piston could be made to collapse on emergency, being sprung out by a steel spring against a stop which could be adjusted, one would… | ||
| scan 177 | Piston design, comparing it to the Bentley type, and experiments with split aluminium pistons. | ||
| View original record | To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to EP. X 2448. Hs5/LG29.12.19. X.2748. - RE PISTONS. X.3754. X.3732. -------------------------------------- X 3714 The proportions of our… | ||
| scan 178 | Piston experiments, detailing tests on cast iron and plunger types and addressing issues like flexibility and oil leakage. | ||
| View original record | Contd. -2- Hs5/LG29.12.19. non-pressure side to form the spring. These look very promising. If they collapse, however, in the same way as the present ones, we might try fixing a cantilever spring off… | ||
| scan 179 | Sending a sample of successful E.4237 cast iron pistons to West Wittering. | ||
| View original record | To R. from Hs. c. to CJ. c. to H. c. to E. c. to DA. c. to EP. C.K. x.2748 Hs3/LG31.12.19. X.3452E PISTONS. x.2748 The most successful cast iron pistons we have used on the car are E.4237. We are… | ||
| scan 180 | Piston testing, specifically addressing over-oiling and knocking issues on a 10,000-mile test car. | ||
| View original record | X.2748 To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to EP. HS3/LG1.1.20. X.2748. - RE PISTONS. X.3743. X.3715. We have been endeavouring to find the best piston which is reliable enough to… | ||
| scan 181 | Piston wear, lubrication, and testing for the 10,000-mile test car. | ||
| View original record | R. R. 235 a (100 T) (S.F 846 6-8-19) G. 2460 Contd. -2- HS3/LG1.1.20. we do not get any piston knocks. This scheme with the spring without any oil fed to the ram is the most reliable pistons of this… | ||
| scan 182 | Note on oil leakage past the piston ram and the function and limitations of scraper rings. | ||
| View original record | Contd. -3- Hs3/L.H.1.1.20. leaks past the.ram is drained into the back of the piston without getting on to the cylinder walls. All forms of scraper rings will only deal with a certain 2uantity of oil;… | ||
| scan 183 | Development of new piston designs for a 10,000-mile test, comparing plunger and Recardo types. | ||
| View original record | To Hs. from R. c. to Cj. c. to Bn. c. to Wor. -------------------- x 2748 3.1.20. X.3647. RE PISTON FOR 10,000 MILES. X.3715. x 2748 X 3776 -------------------------------------- (1) I am telegraphing… | ||
| scan 184 | Piston technology, comparing Ricardo's aluminium pistons to older cast iron ones. | ||
| View original record | Contd. -2- 3.1.20. worth while, it seems to me so hopeful, so reasonable and so safe. (6) I propose that we should consult with the Ricardo people on the subject of pistons, before deciding to return… | ||
| scan 185 | Technical memorandum critiquing a supplied cast iron piston and proposing an alternative trunk type design. | ||
| View original record | X.2948 To Hs. from R. Copy to CJ. " " Bn. " " Ck. X.3754. - RE PISTONS. RG/GS.1.20. X.2948 The cast iron piston you have sent us does not appear a very hopeful design should we be obliged to return to… | ||
| scan 186 | Testing Ricardo pistons in aluminium and cast iron, comparing the Zephyr and Ricardo types. | ||
| View original record | Contd. -2- R6/G6.1.20. It might also be advisable to test a set of Ricardo pistons in both aluminium and cast iron, made in accordance with our most recent knowledge. I am inclined to think, however,… | ||
| scan 187 | Reported disintegration of aluminium pistons with a die-cast aluminium founder. | ||
| View original record | X.2748 To R. from Bn. Copy to CJ. " " Wd. " " Da. " " Hs. " " Ck. Copy to By. Bn5/W8.1.20. X.2609b. Referring to Disintegration of Aluminium Pistons. X.2748. Mr. Whitehead kindly arranged for Mr.… | ||
| scan 188 | Instruction to forward a sample Crossley Piston upon its arrival. | ||
| View original record | Contd. -2- Bn5/W8.1.20. Wewill instruct the sample Crossley Piston when it arrives to be forwarded to you for your information together with our remarks if any are necessary. Bn. | ||
| scan 189 | Faults with aluminium pistons, specifically loud knocking and carbon deposits. | ||
| View original record | X2748 To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to EP. Hsl/LG15.1.20. X.2748. - RE ALUMINIUM PISTONS. X.3715. X.682. X.2631. During the recent run to W.W. on 49-GB we noticed that this… | ||
| scan 190 | Piston carbon build-up and knocking issues on vehicle 49-GB. | ||
| View original record | Contd. -2- Hs/1/LG15.1.20. on 49-GB, we left the normal clearance on the top band. After seeing the pistons on 49-GB, however, we think this should certainly be cleared away, leaving only the narrow… | ||
| scan 191 | Recommendation to adopt an improved design of split aluminium piston and comparison with cast iron pistons. | ||
| View original record | R R. 235 a (100 T) (S.F 846 6-8-19) G. 2460 X.2748 To Bn. from Hs. c. to Wor. c. to By. c. to Da. c. to EP. --------- Hs1/LG17.1.20. --------- X.2748. X.3732. X.3754. --------- X.3751. - RE ALUMINIUM… | ||
| scan 192 | Comparative testing of cast iron versus aluminium pistons in specific trial cars. | ||
| View original record | R.R. 235A (100 T's) (S.F 816 6.8.19) G. 2460 Contd. -2- Hsl/LE/17.1.20. should be to get several sets of cast iron pistons as soon as possible. We should fit sets of these pistons to the London Trials… | ||
| scan 193 | Potential causes for trouble with aluminium pistons on the 49-GB car engine, such as carbon deposits or expansion. | ||
| View original record | X.2748 To Hs. from R. Copy to CJ. " " Bn. " " Da. " " PD. " " CK. X.2748. - RE ALUMINIUM PISTONS. Hsl/LG15.1.20. R9/G20.1.20. X.2631. X.682. X.3715. With reference to the pistons on 49-GB, there seems… | ||
| scan 194 | Piston performance, carbon deposits from different lubricating oils, and potential remedies. | ||
| View original record | Contd. -2- R9/G20.1.20. According to the appearance of the piston, the oil plunger seems to be keeping the piston well on the power side, while the other side above the rings gets a carbon deposit. On… | ||
| scan 195 | Potential seizing issue with the Crossley piston due to its 'desaxé' (offset) pin design. | ||
| View original record | R.R. 235 B (200 T) (S V. 673. 22-5-19) G 2376 X.2748 To Bn.) from R. " Hs.) Copy to CJ. R6/G27.1.20. X.2748. - RE PISTONS. The Crossley piston is desaxé in the piston pin. This might well cause it to… | ||
| scan 196 | Engine performance test data for aluminium pistons using 50% Benzol fuel with the cut-out closed. | ||
| View original record | x 2448 3.2.20. C.R. ALUMINIUM PISTONS. R.P.M. | Lbs. | HP. 1000 | 58 | 48 1250 | 56 | 58 1500 | 54 | 67.5 1750 | 50 | 73 2000 | 46 | 76.5 2250 | 40 | 75 50% Benzol Cut-out Closed. | ||
| scan 197 | The location of a missing model of a Slipper Type Piston. | ||
| View original record | X.2748 DA4/CB5-2-20. To the Store. (Struck Through) Copy to SN. (Struck Through) from DA. Copy to HS. Mr Royce said he was sending in a registered package of a model of a Slipper Type Piston. We have… | ||
| scan 198 | Gas leakage issues with non-gas-retaining split type pistons causing noise and fumes. | ||
| View original record | EH. from EP. c. to Bn. c. to BY. c. to Da. c. to E. C.K. x 2448 EP19/F6.2.20. X 3432 RE LEAKAGE PAST THE PISTONS. X.858 We have been concerned with the way in which the present split type pistons are… | ||
| scan 199 | Test history report on the disappointing performance of the T2 motor, discussing its issues and future prospects. | ||
| View original record | G.K. RS.V/MARK.I TEST HISTORY. X524 Contd. We have been most disappointed with the way the T2. motor has behaved on its latest test, for although we have cured the a bad case of one piece big end… | ||
| scan 200 | Cases of piston rattles, tests conducted to resolve the issue, and subsequent recommendations. | ||
| View original record | R.R. 235A (100 T) (S.F. 846, 6-8-19) (?) 2460 X.2748 13 2 20 X.2748 FACTS WITH REFERENCE TO PISTON RATTLES X 1434. 1. The first case of piston rattles was on 7-CA Car, it was being used by Mr. Royce.… | ||
| scan 201 | Resolving piston rattles by adjusting piston ring position, referencing pre-war designs and lubrication. | ||
| View original record | Contd. -2- 1. In placing a ring high up on the piston we are only reverting to a practice which was used successfully on all our pre-war cast iron pistons. All R-R Cars on the road (previous to the… | ||
| scan 202 | Complaint detailing the causes of fumes entering covered car bodies and requesting a cure for current and post-war models. | ||
| View original record | X.2448. Hs. from EP. c. to EN. c. to BY. c. to Da. COPY. CR EP11/P24.2.20. RE. FUMES INSIDE COVERED BODIES. X 2448 X.858 X.3431 With reference to my complaint re. the above, I should be glad if you… | ||
| scan 203 | Adoption of split aluminium pistons and troubleshooting an engine knock. | ||
| View original record | H.R. 235 a (100 T) (S) F 846 6.8.19 G 2469 X.2448 To Hs. from R. c. to CJ. c. to Ba. c. to Da. c. to Ck. RL/G26.2.20. X.2448 RE SPLIT ALUMINIUM PISTON. X.3559. X.3451. We are pleased that the pistons… | ||
| scan 204 | Telegram from Mr. Royce detailing a solution for piston tightness due to carbon deposits. | ||
| View original record | X.2448 Copy of Telegram received from Mr. Royce. 15.3.20. CLAUD JOHNSON ROLHEAD REG L NDN. X.3451a X.2448 X.3743 WE HAVE APPARENTLY FOUND DEFINITE SOLUTION FOR MADDOCK COMPLAINT AS TIGHTNESS OCCURS… | ||
| scan 205 | Cause of and solution for piston rattles. | ||
| View original record | H. N. 255 A (100 T) (S.F. 846 6-8-19) G. 2480 To Cj. from R. Copy to Bn. " " Hs. " " EP. X.2748. RB/G16.3.20. X.2748. RE PISTON RATTLES. X.3751. I telegraphed to you yesterday that we had this… | ||
| scan 206 | Urgent modification of pistons by fitting extra rings, referencing pre-war practices. | ||
| View original record | R.R. 235 a (100 T) (S-F 846 6-8-19) G. 2460 X.2748 To C.J. from Hs. Hs1/LG18.3.20. X.2748. REPISTONS. X.3751. With reference to attached telegrm from Mr. Royce., we do not consider that the fitting of… | ||
| scan 207 | Confirmation of a telegram regarding engine piston modifications to resolve rattles caused by carbon deposits. | ||
| View original record | CONFIRMATION OF TELEGRAM% 16th March, 1920. REPLY PAID. ROYCAR DERBY. HIVES RE BJ AND MADDOCKS REPORT ON RATTLES HAS THIS PARTICULAR ENGINE PISTONS WHICH HAVE BEEN TURNED DOWN TO AVOID TIGHTNESS… | ||
| scan 208 | Piston rattles, binding issues, and the modification of adding rings to solve the problem. | ||
| View original record | X.2448 TO R. from HS. c. to CJ. c. to Bn. c. to E. c. to Da. c. to By. HS7/LG18.3.20. A.2748. RE PISTONS. A.3715. A.2631. we have had a case of slight piston rattles even when the top band of the… | ||
| scan 209 | Rattling pistons, the potential for engine seizure, and the need for an immediate conference to determine a solution. | ||
| View original record | X.2448 To En. From CJ. c. to Wor. c. to HE. [Struck through] c. to EP. CR CJ11/E18.3.20. X 2448 [Struck through] RE PISTON RATTLES. X.3751. With reference to the enclosed memorandum, R8/G16.3.20, re… | ||
| scan 210 | Summary of a conference discussing the causes and observations of piston rattles in engines. | ||
| View original record | X.2448 re To Co. from Bn. (Strikethrough) To R. from Bn. X.2448 PISTON RATTLES. X.3457. Bn1/W22. 3. 20. X.1434 c. to Wor. (Strikethrough) c. to Sft. (Strikethrough) c. to Da. (Strikethrough) c. to EP.… | ||
| scan 211 | Internal memorandum discussing piston rattles, experiments with increased clearances, and the performance of different piston types and lubricating oils. | ||
| View original record | To R. from Bn. To CJ. - 2 - Bnl/W22320 (Contd.) Experimental cars mentioned, the practice of increasing very considerably the clearance on the top band is not a complete cure but it certainly delays… | ||
| scan 212 | Piston rattle faults, decarbonisation, and recommendations against immediate modifications to engines. | ||
| View original record | To R. from En. To CJ. - 3 - Bnl/W22320 Contd. rattles developed) whereas before the War we were forced to recommend decarbonisation of pistons and cylinders after 3000 miles owing to the development… | ||
| scan 213 | Implementation of modifications, specifically increased clearance for split pistons. | ||
| View original record | To R. from Bn. To CJ. from Bn. - 4 - Bnl/W22320 Contd. any modification can be instructed to the Works for incorporation at a point which will not affect production. By that time we believe that… | ||
| scan 214 | Cause and potential cure for an elusive engine knock related to gudgeon pin lubrication. | ||
| View original record | x.24/48. EX MAR 25 1920 A.T. (2) RECEIVED x.y3y. H.R. from E.F. E.R. to PH. P.H. to P.W. P.W. to CK. x.2448. y.3459. EP11/F25.3.20. RE. ELUSIVE KNOCKS. An engine was condemned on test the other day… | ||
| scan 215 | Extract detailing four urgent design issues causing production delays, related to the starter, steering, pistons, and dynamo. | ||
| View original record | X 2748 Extract from EP16/F26.3.20. X.2565. RE ALTERATION IN DESIGN AND DELAY IN OUT-PUT. I think the following, however, are improtant features which should have urgent attention, so that cars can be… | ||
| scan 216 | Confirming that an 'elusive knock' is caused by the gudgeon pin, and outlining a discussion with Mr. Royce on potential solutions. | ||
| View original record | To Ep. from Hs. c. to RH. c. to BY. c. to Da. [Handwritten]: EFC [Handwritten, crossed out]: X.2748 [Typed]: Hs3/LG27.3.20. [Handwritten, crossed out]: X.2748 [Typed]: RE ELUSIVE KNOCKS.… | ||
| scan 217 | Diagnosing 'elusive knocks' as gudgeon pin knock and discussing potential solutions with Mr. Royce. | ||
| View original record | X.2748 To EP. from Hs. c. to Bn. c. to By. c. to Da. Hs3/LG27.3.20. X.2748. RE ELUSIVE KNOCKS. X.3715. X.3751. From tests on experimental cars, we confirm the results obtained on test that the elusive… | ||
| scan 218 | Design and testing of aluminium pistons for car engines, including ring configuration and split piston design. | ||
| View original record | R.R. 225 a. 10m. T.(b).F. 246. 6-8-19. O. 2460. X.2948 To Oy. From R. Copy to CJ. " " JCR. " " NA. " " Bn. " " Hs. " " EP. " " HM. X.2748. RE PISTONS FOR CAR ENGINES. X 3757. We have recently… | ||
| scan 219 | Test results table showing compression and permanent set data for a solid type piston under various weights. | ||
| View original record | 1 Solid TYPE Piston X2748 4.494 dia WEIGHT IN LBS | COMPRESSION | PERMANENT SET 26 | .002 | nil 36 | .0025 | " 46 | .003 | " 56 | .0035 | " 66 | .004 | " 76 | .0045 | " 86 | .005 | " 96 | .0055 | "… | ||
| scan 220 | Table of weight, compression, and permanent set measurements for a solid type piston. | ||
| View original record | ② SOLID TYPE PISTON. X-2748 WEIGHT IN LBS. | COMPRESSION | PERMANENT SET 276 | .011 | Nil 286 | .011 | " 296 | .011 | " 306 | .0115 | " 316 | .012 | " 326 | .012 | " 336 | .0125 | " 346 | .0125 | "… | ||
| scan 221 | Comparative wear on cylinder bores caused by aluminium versus cast iron pistons. | ||
| View original record | X.2748 To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to EP. c. to Wor. Hs1/LG12.4.20. X.2748. RE PISTONS. X.3732 During our last visit to W.W., Mr. Royce raised the question re. the wear on… | ||
| scan 222 | Continued discussion on the issues and relative merits of cast iron versus aluminium pistons. | ||
| View original record | W. H. S. (100 T) (S.F. 846 8-19) G. 2489 Contd. -2- Hsl/LG12.4.20. miles, has worn .007". As the wear is generally consistent on all six cylinders the most porbable cause for the variation one would… | ||
| scan 223 | Piston troubles, comparing aluminium with cast iron pistons and discussing knock issues. | ||
| View original record | R.R. 235 a (100 T) (S.F. 816 6-6-19) G. 2480 -3- HS1/LG12.4.20. Contd. one /considers the labour charges of to-day. As regards piston troubles on the present standard cars fitted with aluminium… | ||
| scan 224 | Technical report discussing piston clearances, internal strains, and gas leakage issues. | ||
| View original record | Contd. -4- HS1/LG12.4.20. went in a matter of .005" to .006". On the next set we hammered them before we machined them to get rid of the internal strains. We found then that the pistons remained up to… | ||
| scan 225 | Analysis of piston ring performance concerning gas leakage, crankcase vapor, and piston materials. | ||
| View original record | 2. Contd. -5- Hsl/LG12.4.20. fitting portion of the piston assisted in holding the gas. The gas which leaks past a piston gets by the stop or joint than round the band between the rings to the next… | ||
| scan 226 | Comparison of horsepower for a standard engine using cast iron versus aluminium pistons, and a second test showing horsepower with varying numbers of rings on aluminium pistons. | ||
| View original record | 12.4.20. COMPARISON OF HP. TAKEN ON A STANDARD ENGINE FITTED WITH CAST IRON AND ALUMINIUM PISTONS. TABLE 1 H.P. R.P.M. | ALUMINIUM. Cut-out open. | ALUMINIUM. Closed. | CAST IRON. Cut-out open. | CAST… | ||
| scan 227 | The findings regarding engine piston rattles following tests. | ||
| View original record | x.2748 RE PISTON RATTLES. Bnl/W13. 4. 20. Copy to Bn. x.2448 x.345/a C. to Ey. C. to EP. c. to EFC. c. to EFCS The action to be taken in connection with Piston Rattles was further considered at a… | ||
| scan 228 | Agreeing to the immediate issue of a Standardisation Sheet for a modification, based on a report by Mr. Hives. | ||
| View original record | Bnl/Wl3420 contd. It was agreed that a Standardisation Sheet should be issued at once, covered by a report from Mr. Hives, to settle whether this modification should be put into production at a point… | ||
| scan 229 | Piston rattles caused by carbon build-up and a proposal for a new six-ring piston design. | ||
| View original record | R.H. 250 . 100 T/PxF. 846. 6-8-19. O. 2460. X.2448 To Hs. from R. Copy to CJ. " " Bn. " " Da. " " EFC. " " By. R14/G20.4.20. X.2748. RE PISTON RATTLES. X.3751a. With reference to piston rattles, and… | ||
| scan 230 | Inconsistency of using 1/8' liners under cylinders for new high and low compression pistons. | ||
| View original record | EY. from hs. c. to Pa. c. to EF. 96.FC x 2448 HS2/LC9.6.20. X.2448 RE PISTONS. X.3704 We notice that on all low compression cars there is being fitted a 1/8" liner under the cylinders. We think it is… | ||
| scan 231 | Use of liners for chassis pistons. | ||
| View original record | [Top Left] Hs. from BY. c. EP. [crossed out] c. Ba. [crossed out] c. Hm. [Handwritten top centre] R.F.C. X.2748 [Top Right] BY6/P11.6.20. [STAMP] E F C RECEIVED JUN 1 [Title] X.290 [handwritten,… | ||
| scan 232 | Chassis pistons and liners, discussing low compression configurations and engine vibrations. | ||
| View original record | R.R. 199 (250T) (SDG)(6 19-2-17) M P X.2448. BY. from EP. c. to Hs. c. to De. c. to HM. R Fe. EP15/F11.6.20. X 2448 RE. CHASSIS PISTONS AND LINERS. X.790 With reference to your BY6/P11.6.20, the… | ||
| scan 233 | Use of a cylinder liner for modifying engine compression between high and low compression pistons. | ||
| View original record | Hs. from BY. c. to EP. c. to Hm. S.F.C. X.2748 COPY. BY1/P14.6.20. X.2748 CHASSIS - CYLINDERS. RE PACKING BETWEEN CYLINDER AND CRANKCASE. X 790 Referring to my previous correspondence under this… | ||
| scan 234 | Decision to abolish the liner used in low compression pistons for early postwar cars to reduce compression. | ||
| View original record | 2 X.2748 E JUN 1. BY.3/16.6.20. RECEIVED! Mr Shelton from BY. c. Hs. [struck through] e.87C X.2448 [struck through] X.4146 [struck through] CHASSIS - PISTONS. X.790h It has been decided by Conference… | ||
| scan 235 | Confirming the decision to alter pistons for a low compression engine instead of using a liner. | ||
| View original record | X.2748 To Hs. from R. Copy to CJ. R15/G25.6.20. X.2748. X.4146. RE WORKS' CONFERENCE OF 15th JUNE, 1920. I agree that the pistons for the low compression engine should be abtered instead of using a… | ||
| scan 236 | Testing of a full floating piston pin design to eliminate engine knock for the 40/50 HP chassis. | ||
| View original record | x2748 To Da. from E. Copy to CJ. " " Bn. " " Hs. " " EFC. " " By. X.4190. RE PISTON PINS. - 40/50 H.P. CHASSIS.X.2748 Referring to the question of eliminating the elusive piston pin knock we send you… | ||
| scan 237 | Solution to fix elusive gudgeon pin knocks at low engine speeds. | ||
| View original record | X2448 To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. c. to By. c. to EP. c. to EWT. for R.R. Inc. X.419D. RE - ELUSIVE GUDGEON PIN KNOCKS. X.2748. We anticipate that we shall receive complaints… | ||
| scan 238 | Experimental solutions for engine knocking, including expanding gudgeon pins and tapered wedges. | ||
| View original record | Contd. -2- light load. The knock takes place whether the cylinders are firing or not. The Drivers' Instruction Car has now completed 7000 miles since these springs were fitted and 19,000miles since… | ||
| scan 239 | Seeking Mr. Royce's agreement on methods to resolve customer complaints. | ||
| View original record | Contd. -3- Hs4/LG27.9.20. expanded. We have not found nor can we anticipate that either of these things can possibly cause any harm, the question is whether they are going to prove a permanent cure.… | ||
| scan 240 | Measured wear on six pistons from a Shop Car. | ||
| View original record | OCT 27 To Hs. From RHC. X.2448 R.F.E. RHC2/LG27.10.20. RECEIVED. X2448 RE SHOP CAR PISTONS. With reference to the pistons which were taken off the Shop Car and which you requested should be measured… | ||
| scan 241 | Letter to Allen & Simmonds Ltd. requesting samples of recommended piston rings for motor car engines. | ||
| View original record | x2748 HS10/LG. 28th October, 1920. Allen & Simmonds Ltd., Thames Side Engineering Works. Reading, Berks. Dear Sirs, x.1105. for the attention of Mr. Hl Allen. x.2748. With reference to your RA/WJB of… | ||
| scan 242 | The wear analysis of aluminium pistons from a Shop Car after 33,000 miles. | ||
| View original record | X2748 To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to Da. Hs9/LG28.10.20. X.2748. RE ALUMINIUM PISTONS. We have altely removed a set of aluminium pistons from the Shop Car at the works. These… | ||
| scan 243 | Wear on aluminium pistons and cylinders, exploring the effects of different lubricating oils and piston ring configurations. | ||
| View original record | X2448 To ES. from R. c. to CJ. c. to Bn. c. to Da. c. to By. c. to EFC. R9/G3.11.20. X.2748. RE ALUMINIUM PISTONS. X.1583. X.1434. We are very pleased to hear of the very small amount of wear on the… | ||
| scan 244 | Pistons and rings from Allen and Simmonds Ltd., recommending a test of their product to improve gas-tightness. | ||
| View original record | X2748 To R. from Hs. c. to CJ. Hsl/LG5.11.20. X.1105. RE PISTONS AND RINGS. X.2748. We attach hereto Booklet and blue print from Allen and Simmonds Ltd., of Reading on Pistons and Rings. Their… | ||
| scan 245 | Friction tests for thin and thick leaf cantilever springs under different conditions. | ||
| View original record | To R. from Hs. c. to CJ. c. to Bn. c. to E. c. to By. c. to Da. c. to EP. c. to EWT. for R.R. Inc. x2748 Hs1/LG6.11.20. Curves attached to original. X.2748. FRICTION IN CENTILEVER SPRINGS. We have… | ||
| scan 246 | Friction tests on thin and thick leaf springs, comparing greased springs with those using Ferodo interleaving material, and the effects of clipping. | ||
| View original record | Contd. -2- Hs1/KGS.11.20: will remain constant for years. We have measured the friction in the thin and thick leaf springs when fitted with the interleaving material and we find that the friction is… | ||
| scan 247 | Continued memo discussing the application of friction in leaves and shock absorbers. | ||
| View original record | Contd. -2- Hsl/LG6.11.20. We think that the permanent friction which is required should be in the leaves and then a shock absorber to give friction in stages. We think every endeavour should be made… | ||
| scan 248 | Graph comparing friction in different types of cantilever springs under greased and rusty conditions. | ||
| View original record | FRICTION IN CANTILEVER SPRINGS ① THICK LEAF TYPE 6 LEAVES GREASED ② THICK LEAF TYPE 6 LEAVES RUSTY ③ THIN LEAF TYPE 11 LEAVES GREASED ④ THIN LEAF TYPE 11 LEAVES RUSTY BOTH TYPES OF SPRING ARE THE SAME… | ||
| scan 249 | Cover page with handwritten reference numbers and a company ink stamp. | ||
| View original record | X2748 Hs.1 / Eg 6.11.20 ROLLS-ROYCE, LTD. PRINT ROOM. 9-NOV. 1920 DERBY | ||