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 Hub Horse Power versus Engine R.P.M. for a specific chassis and engine combination under various test conditions.
| Identifier | ExFiles\Box 109\4\ scan0122 | |
| Date | 29th June 1939 | |
| HUB HORSE POWER CHASSIS 30 G7 ENGINE UNIT B 80 N° 5 {BUICK TYPE EXH. AND} {AIR SILENCERS.} THESE FIGURES WERE OBTAINED ON THE CHASSIS DYNO. ON DUNLOP TRACK RACING TYRES @ 45 LB/IN² (DIRECT GEAR) B.H.P. CORRECTED TO 50°C AIR TEMP. ENGINE R.P.M. APPROX. M.P.H. WITH 7.50 x 16 TYRES, 11.41 AXLE & DIRECT GEAR. OPEN EXHAUST NO FAN SILENCED NO FAN COMPLETE MOTOR CAR RM{William Robotham - Chief Engineer}/TAS{T. Allan Swinden}/ 29·6·39. | ||