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).
Specifications and order instructions for stepped compression rings.
| Identifier | ExFiles\Box 148\3\ scan0125 | |
| Date | 27th May 1936 | |
| -2- Hs{Lord Ernest Hives - Chair}/Mths.{Reg Matthews}22/KW.27.5.36. Stepped Compression Ring. Overall width = .125 - ½ Radial thickness= .150 + 3 - 3 Cylinder wall pressure = 43 lbs/sq.in. We require all rings to have a fine turned finish on the periphery similar to the rings you supply to Mr. Taub of the Chevrolet and Vauxhall Companies, in fact we should like all the rings to be a reproduction of the Chevrolet rings. We are instructing our Order Office to pass you an official order.for the rings in question. Yours faithfully, FOR ROLLS-ROYCE LIMITED. | ||