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).
Stating that work on Ricardo type pistons has been paused for the present.
| Identifier | ExFiles\Box 77\1\ scan0005 | |
| Date | 14th June 1917 | |
| 7 R.R. 235 B (380 H) (S.D. 442. 9-5-17) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1966 To EFC. from E.{Mr Elliott - Chief Engineer} 14.6.17. X. 2974 - RICARDO TYPE PISTONS Side tracked for the present. (Sgd) E.{Mr Elliott - Chief Engineer} | ||