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).
Test on exhaust valve size modifications.
| Identifier | ExFiles\Box 17\6\ Scan133 | |
| Date | 26th August 1933 | |
| 8760. RHC.{R. H. Coverley - Production Engineer} From Hs{Lord Ernest Hives - Chair}/Std. Hs{Lord Ernest Hives - Chair}/Std.3/MA.26.8.33. TESTS ON EXHAUST VALVE SIZE. Please fit Std.P.II E.82758 cylinder head with modified exhaust valves to Hs.{Lord Ernest Hives - Chair}1115 and exhaust valve seatings to suit these valves (bored out to 1.55" dia. instead of 1.70" dia.) We send you herewith this cylinder head. Hs{Lord Ernest Hives - Chair}/Std. | ||