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).
Modification to the cylinder block to prevent scratching on the working face of the piston.
| Identifier | ExFiles\Box 86\1\ scan0257 | |
| Date | 14th June 1937 | |
| RR 755B (10H) 26074 2-11-36 WHK 24999 COMPLETED 9.11.37. BENTLEY STANDARDISATION of PARTS. Date 14.6.37. X No. 219. Drawing No. EB.2929. Description of Parts: MODIFICATION TO CYLINDER BLOCK. Origin: To prevent scratching on working face of piston. Report of Experimental Test. Cylinder bores have smooth finished radius at mouth to drawing Rm.{William Robotham - Chief Engineer}111 instead of existing chamfer. This modification reduces amount of scratching on working face caused by piston changing from one side of the bore to other at bottom dead centre position. Cylinders with this modification have recently completed 15,000 miles standardisation test satisfactory in 6-B-IW chassis. MATERIAL £ s. d.{John DeLooze - Company Secretary} Cost of Old Part: 6 1 Cost of New Part: 6 1 LABOUR £ s. d.{John DeLooze - Company Secretary} 1 16 10 1 17 3 CHARGES £ s. d.{John DeLooze - Company Secretary} 3 4 5 3 5 2 TOTAL £ s. d.{John DeLooze - Company Secretary} 5 7 4 5 8 6 Nett Increase: 1 2 Signature from Cost Dept. that above is correct. G/N 2.9.37. INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 8-11-37 | Agreed Sg{Arthur F. Sidgreaves - MD} HS.{Lord Ernest Hives - Chair} | | Agreed Hs.{Lord Ernest Hives - Chair} C. | 9.9.37 | Agreed C. E | | DA.{Bernard Day - Chassis Design} | 8.9.37 | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 10.9.37 | Agreed By.{R.W. Bailey - Chief Engineer} EPXX | | RHC.{R. H. Coverley - Production Engineer} | 29.9.37 | Agreed RHC{R. H. Coverley - Production Engineer} (see over). MX.{John H Maddocks - Chief Proving Officer} | 9.9.37 | Agreed Mx.{John H Maddocks - Chief Proving Officer} RM.{William Robotham - Chief Engineer} | 6.9.37 | Agreed Rm.{William Robotham - Chief Engineer} STAMP: J.S. 5 NOV 1937 | ||