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 graph comparing various supercharged and non-supercharged configurations for a Graham Supercharger on a Bentley engine.
| Identifier | ExFiles\Box 140\1\ scan0110 | |
| Date | 12th December 1934 | |
| GRAHAM SUPERCHARGER ON BENTLEY B.V. 61 UNIT :- B.12 SPECIFICATION :- R H C/CP 1/EP{G. Eric Platford - Chief Quality Engineer} 12.12.34 COMPRESSION RATIO 6.64 : 1 WASHER REMOVED FROM ROTOR CASING. ① 1 7/8" S.U. CARB. ORIGINAL LONG INTERMEDIATE PIPE. COLD WATER IN ROTOR CASING. ② 1 7/8" S.U. CARB. SHORT INTERMEDIATE PIPE. NO HEAT TO ROTOR CASING. ③ 1 7/8" S.U. CARB. ORIGINAL LONG INTERMEDIATE PIPE, HOT WATER TO JACKET OF INTERMEDIATE PIPE. ④ 1 7/8" S.U. CARB. AS SEMI-EXPANDING CARB. ORIGINAL LONG INTERMEDIATE PIPE, HOT WATER TO ROTOR CASING. ⑤ NON-SUPERCHARGED. B.H.P. R.P.M. B.M.E.P. (LBS/口'') VALVE TIMING (.020 CLRCE) T.D.C. 4.5° 1.5° EXH. INL. 49.5° 48.5° | ||