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).
Appendix evaluating the increased horsepower available for acceleration on the Vanvooren Bentley compared to a standard model.
| Identifier | ExFiles\Box 161\1\ scan0062 | |
| Date | 1st December 1937 guessed | |
| -3- Appendix. To evaluate the increased horsepower available for acceleration on the Vanvooren Bentley over that of the standard Bentley Y, and to compute the equivalent in weight reduction. HP. due to constant TR {Capt. F. W. Turner - Finance} = (V x W x 30) / 375 HP. due to Windage = (K.AV^3) / 375 where V = speed in M.P.H. A = projected area in sq.ft. W = weight in tons. K = aerodynamic co-efficient in lbs/ton, vel^2 Standard Bentley Saloon. W = 1.65 tons, A = 24.5 sq.ft. TR {Capt. F. W. Turner - Finance} = 30 lbs per ton, K = .00206 HP. due to constant TR. {Capt. F. W. Turner - Finance} = (V x 1.65 x 30) / 375 = .132V HP. due to windage = (K.AV^3) / 375 = .0001345 V^3 Vanvooren Saloon - Aerodynamique. W = 1.70 tons, A = 21.6 sq.ft. TR {Capt. F. W. Turner - Finance} = 30 lbs per ton, K = .000863 HP. due to constant TR {Capt. F. W. Turner - Finance} = (V x 1.7 x 30) / 375 = .136V HP. due to windage = (.000863 x 21.6V^3) / 375 = .0000496V^3 | ||