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).
Agreeing to modify pistons on post-war cars by adding a fifth groove and an extra ring.
| Identifier | ExFiles\Box 148\3\ scan0015 | |
| Date | 22th July 1921 | |
| R.R. 235a (100 T) (S.H. 798. 10-12-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2948. X2748 To Hm.{Capt. W. Hallam - Head Repairs} from R.{Sir Henry Royce} c. to CJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to Hs.{Lord Ernest Hives - Chair} R8/G22.7.21. X.2748 - RE POST-WAR CARS FITTED WITH FOUR-RINGED PISTONS. With reference to your memo. Hm{Capt. W. Hallam - Head Repairs}12/W18.7.21, I agree to Mr. Hives suggestion of turning fifth groove on the above pistons and fitting and extra ring, if it has been proved to have distinct advantages. R.{Sir Henry Royce} | ||