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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
  
  


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