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).
Comparing the F.XII and Curtiss engine performance curves due to their similar compression ratios.
| Identifier | ExFiles\Box 36\2\ scan 143 | |
| Date | 1st January 1928 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to BJ. RG.{Mr Rowledge} c. to Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} Col. Fell. X2934 Hs{Lord Ernest Hives - Chair}1/LCG.1.28. F.XII 6/1 COMPRESSION RATIO. X3366 We attach herewith comparative curves of F.XII and the Curtiss engine. These engines have approxi- mately the same compression ratio - 6/1. The throttle consumption curves we are obtaining on the F.{Mr Friese} engines are an improvement over any of our other engines. Hs.{Lord Ernest Hives - Chair} | ||