Different types of pistons passed for testing.
| Identifier | ExFiles\Box 77\1\ scan0002 | |
| Date | 1st July 1920 | |
| X.3983 RHC. {R. H. Coverley - Production Engineer} from EFC. {E. Fowler Clarke - Electrical Engineer} RHC {R. H. Coverley - Production Engineer} 3/LG1.7.20. RE PISTONS. Will you kindly note that the following pistons hav been passed to test:- X.3881. - Split C.I. Piston with diagonal wed and scrper. X.3607. - Pistons with lower compression and 1.250 oil plunger or saw cut. X.3715a. - Ram piston - plunger with one ring. X.3983. - Oil contained floating gudgeon pin. RHC. {R. H. Coverley - Production Engineer} | ||
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).