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).
Request to modify a set of 25/30 HP pistons to have ring stops.
| Identifier | ExFiles\Box 105\2\ scan0230 | |
| Date | 17th July 1936 | |
| To RHC.{R. H. Coverley - Production Engineer} x536 Hs{Lord Ernest Hives - Chair}/Mths.{Reg Matthews}27/KW.17.7.36. 25/30 HP. Pistons. Will you please modify a set of 25/30 pistons to E.60632 so that rings have stops as on 20/25. Mx.{John H Maddocks - Chief Proving Officer} has had a set modified using the existing 20/25 stops and by filing the compression rings to suit. The compression rings will just about clean up but we shall have to supply you with a set of butt-jointed rings in order for you to fit stops to the scraper rings, as these are too wide to clean up normally. Hs{Lord Ernest Hives - Chair}/R.Matthews. | ||