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).
Pistons made from Mr. Hall's special metal for the 'Condor' engine.
| Identifier | ExFiles\Box 37\3\ scan 030 | |
| Date | 13th December 1918 | |
| EFC. from RHC.{R. H. Coverley - Production Engineer} RHC{R. H. Coverley - Production Engineer}13.12.18. X.3198A.-PISTONS IN MR. HALL'S SPECIAL METAL. Pistons in this metal made up for "Condor". RHC.{R. H. Coverley - Production Engineer} | ||