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).
Optimal front tyre pressures for Bentley cars, comparing the recommended 30 lbs with the observed better performance at 35 lbs.
| Identifier | ExFiles\Box 158\1\ scan0096 | |
| Date | 15th October 1936 | |
| S/W. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} Copy to LA.{L. A. Archer} (text is struck through) LE2/C/15.10.36. GRY.{Shadwell Grylls}? (handwritten) Re Bentley Front Tyre Pressures. In Depot Sheet No. Hd.{Mr Hayward/Mr Huddy}310 and based on information received from Hs{Lord Ernest Hives - Chair}/Gry{Shadwell Grylls}17/KW18.9.36., I note it is recommended that we should have the tyre pressures on Bentleys at 30 lbs. Actually we find that when running Bentleys, particularly in London, with 30 lbs. pressure, the steering is distinctly heavier and also we have had a case where there was a definite inclination of tramping. This was considerably improved by increasing the tyre pressures to 35 lbs. Perhaps you would like to look further into this and let me have your remarks. The latest Instruction Book still recommends that the tyre pressures should be 35 lbs. J.L.E. (handwritten signature) | ||