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 showing the performance characteristics of a Graham Car Supercharger with carburetter but without an air cleaner.
| Identifier | ExFiles\Box 126\1\ scan0153 | |
| Date | 27th June 1934 | |
| SHEET 4 GRAHAM CAR SUPERCHARGER WITH CARBURETTER LESS AIR CLEANER CHARACTERISTICS WITH DRY AIR AT 3500 ENGINE R.P.M. CORRECTED TO STD BAR 29.92 STD TEMP 15°C TEST DATE 18-6-34 ROTOR R.P.M. 20,200 ROTOR TIP SPEED 660.5 FT/SEC. Left Y-Axis: DELIVERY PRESSURE ('HG), EFFICIENCY Bottom X-Axis: AIR FLOW (LBS/MIN) Right Y-Axis: HORSE-POWER, TEMP. RISE (°C) Text on Graph: ESTIMATED WORKING POINT 128 H.P. Handwritten text bottom right: A/11, 27-6-34 | ||