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 supercharged and non-supercharged configurations for a Graham supercharger on a Bentley engine.
| Identifier | ExFiles\Box 140\1\ scan0112 | |
| Date | 12th December 1934 | |
| GRAHAM SUPERCHARGER ON BENTLEY B.V. 63. UNIT:- B.12. SPECIFICATION:- RHC{R. H. Coverley - Production Engineer}/CP 1/EP.{G. Eric Platford - Chief Quality Engineer} 12.12.34 COMPRESSION RATIO 6.64:1 ① GRAHAM CARBURETTER ORIGINAL LONG INTERMEDIATE PIPE, HOT WATER TO ROTOR CASING. PACKING WASHER BETWEEN HALVES OF ROTOR CASING. ② NON-SUPERCHARGED. B.H.P B.M.E.P R.P.M. VALVE TIMING. (.020 CL'CE) T.D.C 45° 1.5° EXH. INL. 49.5° 48.5° | ||