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).
Requesting a trial of new tyre pressures for the Wraith model, comparing to American practice.
| Identifier | ExFiles\Box 108\1\ scan0071 | |
| Date | 12th August 1937 | |
| To Rm{William Robotham - Chief Engineer}/IMW{Ivan M. Waller - Head of Chateauroux} (Chateauroux) from Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} 600a Rm{William Robotham - Chief Engineer}/Les.6/AP.12.8.37 26.G.V1. We find the general American practice is to run tyre pressures at 24 front and 28 rear. We are therefore going to run all Wraithsin Derby at 25 lbs. front and 30 lbs. rear. Can you try this tyre pressure and give us a report on the result. If it is O.K. we should like you to keep to 25 lbs. front and 30 lbs. rear for the rest of the mileage. Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} | ||