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 of boost temperature vs RPM for a Graham Supercharger on a Bentley.
| Identifier | ExFiles\Box 140\1\ scan0116 | |
| Date | 12th February 1934 | |
| GRAHAM SUPERCHARGER ON BENTLEY B.V. 67 UNIT: B 12 SPECIFICATION: RHC{R. H. Coverley - Production Engineer}/CP 1/EP{G. Eric Platford - Chief Quality Engineer} 12 COMPRESSION RATIO: 6.64:1 NO WASHER BETWEEN HALVES OF ROTOR CASING NORMAL TEST HOUSE TEMPERATURE 17°C ① GRAHAM CARBURETTER. ORIGINAL LONG INTERMEDIATE PIPE, COLD WATER TO ROTOR CASING. ② AS ① BUT WITH HOT WATER TO ROTOR CASING. BOOST TEMPERATURE (DEGREES CENTIGRADE) R.P.M. | ||