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).
Typed memorandum concluding that the Andreau formula for rolling resistance is valid up to 80 M.P.H.
| Identifier | ExFiles\Box 161\1\ scan0249 | |
| Date | 1st December 1938 | |
| -5- Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}14/JH.1.12.38. It has already been shown that the value of K obtained from the Andreau formula is identical with that obtained from first principles on the dyno. The table of values of K obtained by the former method throughout the speed range shew K to be quite independant of speed. It therefore seems fair to infer that, despite previous evidence to the contrary, K is independent of speed, and hence that the Audrean formula for rolling resistance holds good, at any rate up to 80 M.P.H. Rm{William Robotham - Chief Engineer}/T.A.Swinden. | ||