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 comparison graph of three different carburettor configurations, plotting B.HP and B.M.E.P. against engine R.P.M.
| Identifier | ExFiles\Box 5a\5\ 05-page161 | |
| Date | 19th August 1933 | |
| RM.{William Robotham - Chief Engineer} 28 19/8/3 CARBURETTER COMPARISON ON CHNA S-H C/R HIGH OUTPUT COIL 10° SHAFT ① ---- SU CARB 1 5/8" THROTTLE DIA ② ----- SOLEX CARB 1 5/8" THROTTLE DIA 29 MM CHOKE ③ ----- STD 1 5/8" LARGER R.R. 1 1/2" THROTTLE DIA B.H.P. R.P.M. B.M.E.P. IND. DEPN. INS. HG. | ||