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).
Detonation tests on a 'Vee' 'F' engine with 7/1 compression ratio pistons at 2400 R.P.M.
| Identifier | ExFiles\Box 36\2\ scan 230 | |
| Date | 21th June 1929 | |
| 42934 To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/VH. c.c. to SG.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c.c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c.c. to SY. x3996 NORMAL CASES: IN THE 'VEE' 'F' ENGINES - 7/1 COMP: RATIO PISTONS - DETONATION TESTS AT 2400 R.P.M. We have tested a normal 7/1 comp. 'F' engine for detonation at 2400 r.p.m. If the 2400 r.p.m. type test is successful it is suggested to raise the normal speed of our 7/1 ratio F.{Mr Friese} engines to 2400 r.p.m. This will give us better conditions so far as detonation is concerned. Our tests showed that at 480 B.HP. and 2400 r.p.m. we were on the 'X' point. At 480 B.HP. and 2250 r.p.m. we were on the 'Y' point of detonation. We append a detonation curve which shews when detonation sets in and the comparative intensity as the engine is braked down from 2400 r.p.m. and 480 B.HP. The 'YY' point shown on the curve, represents detonation heard distinctly 8 ft. away from the engine and corresponds approximately with the conditions under which the 20 Hrs. detonation test was run on the full S/C. engine. Hs{Lord Ernest Hives - Chair}/V.Halliwell. | ||