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).
Graph comparing power output (B.HP and B.M.E.P.) versus R.P.M. for different carburettor setups on a 120° camshaft engine.
| Identifier | ExFiles\Box 92\2\ scan0151 | |
| Date | 5th October 1931 guessed | |
| COMPARISON OF POWER OUTPUT FOR VARIOUS DEPNS ON PT. 120° CAMSHAFT L.E.C. 2918. 4.92 C/R.{Sir Henry Royce} OPEN EXHAUST. ① CLAUDEL R.R. C.H. EAGLE IX ② SINGLE 1 7/8 THROTTLE DIA. S.U. ③ R.R. TWIN CHOKE 1 1/4 DIA: CHOKES. 25 40 61.5 EX 61.8 IN .013 TAPPET CLCE. B.H.P. R.P.M. INDUCTION DEPN. INS HG B.M.E.P. RM{William Robotham - Chief Engineer} P.27 | ||