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 document for a modified design of the friction damper on the crankshaft.
| Identifier | ExFiles\Box 137\4\ scan0066 | |
| Date | 24th October 1929 | |
| RR 755 REVISED (10H) (DF 687 4-1-29) 2M. 2/5943. X634. COMPLETED 17.12.29. STANDARDISATION of CHASSIS PARTS. Date 24.10.29. Description of Parts. MODIFIED DESIGN OF FRICTION DAMPER ON CRANKSHAFT. Origin. To reduce troubles experienced with present type. Drawing No. X No. 634. Part List Experimental Test Report. This is a modified slipper wheel with low inertia, and the slipper wheels controlled by W&G springs. Experimental tests have been in progress with this type of slipper wheel for several years. Road Test Report. Run 16,000 miles on 12-EX including 10,000 miles in France. Run 3,000 miles on 22-EX. Fitted to production chassis to confirm improvement. 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. Weight of Old Part. Weight of New Part. Difference per Car. Cost of Old Part. £ 25-14-5 Cost of New Part. £ 25-2-10 Difference per Car. £ 0-11-7 Decrease Cost of Parts in Works which will be scrapped if commenced on:- Series..........£...... Series..........£...... Series..........£...... Signature from Cost Dept. that above is correct. GRH 12/12/29 [STAMP: Received 14 DEC 1929] [STAMP: HANDS] INITIAL | DATE | REMARKS BJX Sg.{Arthur F. Sidgreaves - MD} | 16-12-29 | Agreed Sg.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce} | 26.10.29 | Agreed FHR. WOR.{Arthur Wormald - General Works Manager} | 26.10.29 | Agreed Wor.{Arthur Wormald - General Works Manager} RG.{Mr Rowledge} | 31.10.29 | Agreed Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 29.10.29 | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 28.10.29 | Agreed By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 26.10.29 | Agreed EP.{G. Eric Platford - Chief Quality Engineer} Suggest confirming same is O.K. on few further production chassis. E.{Mr Elliott - Chief Engineer} | 27.10.29 | Agreed AE. PN.{Mr Northey} | 12.11.29 | Agreed PN.{Mr Northey} CWB. | 1.11.29 | Agreed C. HS.{Lord Ernest Hives - Chair} | 24.10.29 | Agreed Hs{Lord Ernest Hives - Chair} | ||