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).
Experiment involving 7-ringed aluminium alloy pistons without a skirt, which were fitted to engine 7C-A and then removed.
| Identifier | ExFiles\Box 181\M11\ img026 | |
| Date | 25th April 1917 | |
| Aluminium Alloy - Pistons 22A / 342 ADJ R.R. 235 B To EFC. From Mr. Coverley. EFC15/T25.4.17. AD J X. 2369A - 7 RINGED PISTONS WITHOUT SKIRT The above experiment has been fitted to 7C-A.{Mr Adams} and is now removed. R.H.C. | ||