From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Standardisation of chassis parts, specifically introducing 20% stiffer springs in the clutch to prevent slipping.
| Identifier | ExFiles\Box 172\1\ img161 | |
| Date | 16th April 1930 | |
| RR 755 REVISED (10M) (DF 687 4-1-29) BM. 2/5943. ORIGINAL COMPLETED 20.5.30 STANDARDISATION of CHASSIS PARTS. Description of Parts. 20% STIFFER SPRINGS IN CLUTCH TO PREVENT SLIPPING INCLUDING MODIFICATIONS TO CLUTCH LEVERAGE. Origin. To prevent clutch slip. Experimental Test Report. Fitted to 14-G4 and run 14,000 miles without any sign of the clutch slipping. The increased engine torque makes this change necessary. Road Test Report. Fitted to 20-G4 14,000 miles, in France with no sign of trouble. Weight of Old Part. Cost of Old Part. £ 1. 18. 9d. Weight of New Part. Cost of New Part. £ 2. 1. 0d. Difference per Car. Difference per Car. £ - 2. 3d. Increase. Signature from Cost Dept. that above is correct. G/RB.{R. Bowen}13.5.30 G.13.5.30 [Disposal Options] A Scrap and replace at all costs, including Chassis already delivered to Customers. B Scrap and replace on Chassis in Works. C Scrap present stock and replace on all Chassis not yet handed to test. D Use existing stock Alteration effective on future Chassis. Cost of Parts in Works which will be scrapped if commenced on :- Series.........£......... Series.........£......... Series.........£......... [Approval Table] INITIAL | DATE | REMARKS BJ. Sg.{Arthur F. Sidgreaves - MD} | 19.5.30 | Agreed Sg.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce} | April 29th | Agreed pp. R.{Sir Henry Royce} Rg.{Mr Rowledge} By | HS{Lord Ernest Hives - Chair} & E absent in France. WOR.{Arthur Wormald - General Works Manager} | 17.4.30 | Agreed Wor.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} | 17.4.30 | Agreed Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 17.4.30 | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 17.4.30 | Agreed By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 24.4.30 | Agreed. Important - present 25 HP. inclined slip. Consider above should be done on all R.{Sir Henry Royce} series. (25th. Chassis). Increased power engine must have above - as tested on 10,000 mile test. EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 17.4.30 | Agreed E.{Mr Elliott - Chief Engineer} PN.{Mr Northey} | 24.4.30 | Agreed PN.{Mr Northey} CWB. | 17.4.30 | Agreed C. HS.{Lord Ernest Hives - Chair} | | Agreed. [Stamp] 20/25 H.P. CHASSIS | ||