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).
Performance test results for a Bensport C.10 engine unit.
| Identifier | ExFiles\Box 3\4\ 04-page247 | |
| Date | 24th March 1933 | |
| Rev. 13A. 24.3.33. 19.G.IV. - BENSPORT ENGINE (C.10 UNIT). Twin S.U. Carburetters. 6 X 19" tyres. 11/50 rear axle. Camshaft Z.59139 - 113° (60 m.p.h. = 3018 r.p.m.) Lightened flywheel Hs.{Lord Ernest Hives - Chair}932. Free exhaust. Compression ratio 6.3/1 Weight of car complete - 36 cwt. 14 lbs. PERFORMANCE TESTS. (1) Ignition Timing 18° B.T.D.C. Ticknall Hill 56.6 secs. 55.8 secs. 55.4 secs. Pistern Hill 55 secs. 56 secs. (Detonates up to 32 m.p.h. water temp. at 80°C). (2) Ignition Timing 10.5° B.T.D.C. (5 notches down). Ticknall Hill 56.2 secs. 55 secs. Pistern Hill 56.2 secs. 57.2 secs (Detonates up to 22 m.p.h. water temp. at 80°C). N.B. Pistern Hill test started at 1st Gate on left past the old level crossing. Roads dry, no wind, - perfect conditions. Hs{Lord Ernest Hives - Chair}/Ltd. | ||