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 parts for Bentley pistons, defining heat treatment and hardness to overcome previous failures.
| Identifier | ExFiles\Box 86\2\ scan0178 | |
| Date | 20th December 1933 | |
| RR 755B (SH) (82674, 16-10-33) BM. 3/252/6. X236. Completed 15.1.34 BENTLEY STANDARDISATION of PARTS. Date: 20.12.33. X No. 236. Drawing No. L.C. 3675. Part List E.B.1299. Description of Parts: Pistons Heat Treatment 70 hours at 160° to 180°. Brinell 90 to 110. Origin: To overcome failures previously experienced. Report of Experimental Test: These pistons were fitted to 1-B-IV and have run 10,000 miles in France. Examined at 5,000 and 10,000 miles. No fractures were observable. Weight of Old Part. Cost of Old Part. £ Weight of New Part. Cost of New Part. £ Difference per Car. Difference per Car. £ NEGLIGIBLE. Signature from Cost Dept. that above is correct. G.R.L. 29/12/33. Cost of Parts in Works which will be scrapped if commenced on :- Series.........£....... Series.........£....... Series.........£....... INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 12-1-34. | Agreed Sg.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} | 2.1.34. | Agreed Wor.{Arthur Wormald - General Works Manager} C. | 2.1.34. | Agreed C. RG.{Mr Rowledge} | | Rg.{Mr Rowledge} absent. DA.{Bernard Day - Chassis Design} | 5.1.34. | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 1.1.34. | Agreed By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 1.1.34. | Agreed EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 9.1.34. | Agreed AE. PN.{Mr Northey} BN.{W.O. Bentley / Mr Barrington} | 4.1.34. | Agreed Bn.{W.O. Bentley / Mr Barrington} SFT.{Mr Swift} | 1.1.34. | Agreed Sft.{Mr Swift} MX.{John H Maddocks - Chief Proving Officer} | 1.1.34. | Agreed Mx.{John H Maddocks - Chief Proving Officer} HS.{Lord Ernest Hives - Chair} | 1.1.34. | Agreed Hs.{Lord Ernest Hives - Chair} Stamp: Received. J.S. JAN 1934 | ||