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).
Request for further information and testing to complete an analysis on the windage of various models compared with American practice.
| Identifier | ExFiles\Box 161\1\ scan0109 | |
| Date | 16th June 1938 | |
| 1380 Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} from Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} Rm{William Robotham - Chief Engineer}2/R.16.6.38. In order to complete the analysis which we are making on the windage of our various models compared with corresponding American practice, we should like the following further information:- (1) The lap speed of the Oldsmobile when loaded up to the same weight as the Wraith, for which we already have a lap speed. (2) Photographs of B.III, 35-EX and the Packard, comparable with those already taken of the Oldsmobile and the Wraith. (3) Lap speeds of B.III when fitted with a reasonable exhaust system compared with the present standard Bentley 6.B., road wheel horse-power to be obtained in both cases before going to the track. (4) Road wheel horse-power to be taken of 35-EX in its present condition. (5) Test bed horse-power loss - (a) Wraith fan. (b) B.III fan. Rm.{William Robotham - Chief Engineer} | ||