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 by fitting 20% stiffer springs in the clutch to prevent slipping, including modifications to the clutch leverage.
| Identifier | ExFiles\Box 5\6\ 06-page068 | |
| Date | 16th April 1930 | |
| A.M. 709 REVISED (10M) (DF 607 10.29) Sc. R/5243. Y5300. COMPLETED 20.5.30. STANDARDISATION of CHASSIS PARTS. Date 16.4.30. S.C. No. 5300 Drawing No. S.3030 Part List E.1484. Description of Parts: 20% STIFFER SPRINGS IN CLUTCH TO PREVENT SLIPPING, INCLUDING MODIFICATIONS TO CLUTCH LEVERAGE. Origin: I/Ph. To prevent clutch slip. Experimental Test Report. Fitted to 14-G4 and run 14,000 miles without any sign of clutch slip. The increase in the torque makes the change necessary. Road Test Report. Fitted to 14-G4 and run 14,000 in France without sign of trouble. Weight of Old Part. Cost of Old Part. £.1-19-9 Weight of New Part. Cost of New Part. £.2-1-0 Difference per Car. Difference per Car. £.0-2-3 increase Signature from Cost Dept. that above is correct. GILL 13/5/30 Agreed W.W. 4/5/30 [Instructions Box] X [next to C] A.{Mr Adams} 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.{John DeLooze - Company Secretary} Use existing stock. Alteration effective on future Chassis. Cost of Parts in Works which will be scrapped if commenced on :- Series......... £......... Series......... £......... Series......... £......... [Table of Signatures] INITIAL | DATE | REMARKS BJ. Sq. | 4-5-30 | Agreed Sq R.{Sir Henry Royce} | 29.4.30 | Agreed p.p. R.{Sir Henry Royce} Rg.{Mr Rowledge} By.{R.W. Bailey - Chief Engineer} - Hs.{Lord Ernest Hives - Chair} & E.{Mr Elliott - Chief Engineer} 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 to slip. Consider above should be done on all R series (25 H.P. 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 AE. PN.{Mr Northey} | 24.4.30 | Agreed PN.{Mr Northey} CWB. | 17.4.30 | Agreed C. HS.{Lord Ernest Hives - Chair} | | Agreed. [Green Stamp]: 20/25 H.P. CHASSIS [Blue Stamp]: RECEIVED J.S. 16 MAY 1930 | ||