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 characteristic graph for a Graham car supercharger at 3000 engine RPM.
| Identifier | ExFiles\Box 126\1\ scan0152 | |
| Date | 16th June 1934 | |
| SHEET 3. GRAHAM CAR SUPERCHARGER WITH CARBURETTER LESS AIR CLEANER CHARACTERISTICS WITH DRY AIR AT 3000 ENGINE R.P.M CORRECTED TO:- STD BAR 29.92 STD TEMP 15°C TEST DATE: 16-6-34 ROTOR R.P.M 17,300 ROTOR TIP SPEED 565.5 FT/SEC. DELIVERY PRESSURE ("Hg) EFFICIENCY HORSE - POWER TEMP RISE (°C) AIR FLOW (LBS/MIN.) DEL'Y PRESS' TEMP' EFF'Y HORSE - POWER TEMP' RISE ESTIMATED WORKING POINT 1 1/2 H.P. AD / 16-6-34 | ||