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).
Engine performance, chassis rigidity, body booms, and proposed static tests for a 6-cylinder engine.
| Identifier | ExFiles\Box 12\6\ 06-page043 | |
| Date | 22th April 1931 guessed | |
| (3) You will remember that I took up the position that our 6 cyl. P. 1. & P. 2. engine could be made better so that we could reduce the trouble at the source and after suggesting working at every possibility we have only been able to make the engine a little better at very high speeds, and that our imperfection of flywheel mounting, any crankchamber deflection, or any other curable faults have been found to have no influence on body booms, and we can only only modify the effect on the body by altering the mounting and accepting a less rigid chassis, which my experience here says is worse than the trouble reported. I think we must find a better compromise, such as softer rubber in the rear feet or the suggestion in this letter of feet off the gearbox, as I recommend for J.{Mr Johnson W.M.} 3. since I cannot see how we can alter this engine from 6 cyl. while we have 6. on the big car. Had we got our own steel bodies as in USA, we might compromise by trusting to those of known qualities to stiffen our chassis. The static tests I have lately suggested for complete chassis should have the prompt attention of one of the juniors; I suggest Mr. Leslie and Mr. Grylls could do this and give us the degrees say per 1000 in. lbs. of torque at the front axle. R.{Sir Henry Royce} | ||