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).
Revised engine with a high crankchamber, and requesting the compression ratio for the EAC.7 engine.
| Identifier | ExFiles\Box 65a\1\ scan0081 | |
| Date | 24th May 1927 | |
| To Hs.{Lord Ernest Hives - Chair} from E.{Mr Elliott - Chief Engineer} c. to EY. X7770 E1/M24.5.27. RE. EAC.7. X.7770 X.790 X.7050 We are pushing on with a revised engine having a 9" high crankchamber, and cyl. blocks fitted with dry liners, as it is not thought worthwhile to standardise EAC.7. engine in its present form. This engine can also be tried with alternative cyl. blocks having wet liners, using the same crankchamber, cyl. head and valve gear. We should like to know what compression ratio is now in use on EAC.7., and if this is considered satisfactory. E.{Mr Elliott - Chief Engineer} | ||