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 controllable shock dampers, involving grooves in pistons and increased clearance for the valve damping disc.
| Identifier | ExFiles\Box 16\5\ Scan214 | |
| Date | 13th June 1934 | |
| RR 755 (SH) (S7312, 29-12-33) BM 3/646/2 COMPLETED 21.8.34. 40/50 STANDARDISATION of PARTS. Date 11-7-34 Date 13.6.34. X No. 7520. Description of Parts. CONTROLLABLE SHOCK DAMPERS - GROOVES IN PISTONS & INCREASED CLEARANCE FOR THE VALVE DAMPING DISC. Origin. More efficient damping to overcome pitching. This improves the riding in the back of the car. Report of Experimental Test. Grooves in the pistons have been on production on 25 HP. and Bentley chassis since the commencement of the J-III type damper. The increased clearance for the valve damping disc has run 10,000 miles on both 22-EX and 28-EX. It is fitted to all Experimental Chassis with controllable dampers, and also to 104-MY. Weight of Old Part. Weight of New Part. Difference per Car. Cost of Old Part. £ Cost of New Part. £ Difference per Car. £ NEGLIGIBLE Cost of Parts in Works which will be scrapped if commenced on :- Series.........£....... Series.........£....... Series.........£....... Signature from Cost Dept. that above is correct. GHR 6-7-34 INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 9/8/34 | Agreed for Sg{Arthur F. Sidgreaves - MD} Leves WOR.{Arthur Wormald - General Works Manager} | 12.7.34. | Agreed WOR.{Arthur Wormald - General Works Manager} C. | 23.7.34. | Agreed C. RG.{Mr Rowledge} | | Rg.{Mr Rowledge} absent. DA.{Bernard Day - Chassis Design} | 21.7.34. | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 13.7.34. | Agreed By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 12.7.34. | Agreed EP.{G. Eric Platford - Chief Quality Engineer} Consider you should state some opinion on improvement or other-wise by applying 104-MY. E.{Mr Elliott - Chief Engineer} | 14.7.34. | Agreed AE. BN.{W.O. Bentley / Mr Barrington} | 13.7.34. | Agreed Bn.{W.O. Bentley / Mr Barrington} SFT.{Mr Swift} | 13.7.34. | Agreed Sft.{Mr Swift} MX.{John H Maddocks - Chief Proving Officer} | 12.7.34. | Agreed MX.{John H Maddocks - Chief Proving Officer} HS.{Lord Ernest Hives - Chair} | 11.7.34. | Agreed Hs.{Lord Ernest Hives - Chair} | ||