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).
Experiments fitted to an Eagle 'A' engine.
| Identifier | ExFiles\Box 37\3\ scan 028 | |
| Date | 12th February 1918 | |
| To EFC. from RHC.{R. H. Coverley - Production Engineer} X.3198 12.2.18. The following experiments have been fitted to Eagle "A" engine.- X.3198.-Pistons in Mr. Hall's special metal. X.2968E.Friction anchorage for sunwheel carrier. RHC.{R. H. Coverley - Production Engineer} | ||