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).
Letter discussing engine crank-shaft vibration, chassis performance, and a comparison with a Metallurgique car.
| Identifier | ExFiles\Box 122\1\ scan0003 | |
| Date | 4th October 1920 guessed | |
| (3) I think I mentioned before that the engine has a crank-shaft vibration just before the usual 4-cylinder vibrations get uncontrollable. Generally speaking, however, the car runs exceedingly well and shows that our 4 x 6 dimensions should have no ill effect upon our chassis. I am sure this is so, it being rather a question of capacity than of proportion of bore to stroke. [WATERMARK: MVDE VCLOXFEX] The control of the back axle in this Metallurgique we have is of the older pattern. It has its advantages, but evidently its disadvantages are so great that they have gone to the more orthodox pattern in the chassis which they showed at Olympia. These people have made very few changes in their work during the past few years with this exception. I think this car might be sold any time now as we shall have finished with it before it is likely that we can get an order for it. Yours sincerely. | ||