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).
Dynamometer test graph showing Brake Horsepower at the road wheels for a 1939 Buick Century.
| Identifier | ExFiles\Box 125\3\ scan0084 | |
| Date | 27th February 1939 | |
| 1939 BUICK CENTURY 1049 DYNO B.H.P. AT ROAD WHEELS (DIRECT GEAR) TABLE 1: B.H.P. CORRECTED TO ENGINE R.P.M. | 15°C | 50°C | H.P. REQ'D TO DRIVE DYNO. 2000 | 85.0 | 80.0 | 0.4 2500 | 99.5 | 93.5 | 0.7 3000 | 107.0 | 100.5 | 1.2 3500 | 106.5 | 100 | 2.0 3750 | 102.5 | 96 | 2.5 4000 | 97.8 | 92 | 3.2 1130 (25 M.P.H) | 46.4 | 43.6 | 0.2 TABLE 2: AXLE RATIO: 3.9 : 1 TYRES: 15 x 7.00 ROLLING CIRC: 88 3/4" PRESSURE: 48 lb/in^2 WT. AS TESTED (ONE UP) TOTAL: 4158 lbs REAR: 1946 lbs BARO: 751 m.m. GRAPH LABELS: 15°C AIR 50°C CORRECTED FOR DYNO LOSS 50°C AIR AXES LABELS: B.H.P. M.P.H. FOOTER: DYNO BY RATCLIFFE Rm{William Robotham - Chief Engineer}/TAS{T. Allan Swinden}/27.2.39 | ||