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 against Engine RPM for chassis 30 G7 under various configurations.
| Identifier | ExFiles\Box 125\3\ scan0137 | |
| 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. OPEN EXHAUST NO FAN SILENCED NO FAN COMPLETE MOTOR CAR APPROX. M.P.H. WITH 7.50 x 16 TYRES, 11.41 AXLE & DIRECT GEAR. RM{William Robotham - Chief Engineer}/TAS{T. Allan Swinden}/ 29.6.39. | ||