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).
Results of riding tests, focusing on seat cushion damping and comfort.
| Identifier | ExFiles\Box 43\2\ Scan078 | |
| Date | 14th December 1925 | |
| Oy1-E-121425 December 14, 1925. To: Mr. Beaver cc Mr. Nadin Mr. Caswell Mr. Hulley From: Mr. Olley Mack Riding Tests Results of the tests made September 21st and 22nd are now received. The results of these tests requires going into in detail and suggests that we discuss it seriously and acquire as soon as possible a "Newtometer" so that we may measure our actual riding qualities (in the seats.) Further it suggests that we should complete at the Coachworks the cushion-testing machine which has been under discussion for 6 months. Na.{Mr Nadin} and I would give assistance in designing this, if required. The tests bear out what has been frequently remarked, namely that some of our cloth cushions are definitely too lively through insufficient damping. (The cushions referred to however are the cloth cushions on CX{Major Len W. Cox - Advertising Manager} which were hurriedly made.) However, it appears to me that on some of our later jobs all attempt at "damping" of the cushion springs has been abandoned. If so this is bound to give trouble under certain conditions, just as undamped springs do anywhere else on the car. Mack are doing some very important work in improving seats, by regulated pneumatic damping, suspension on rubber airplane cord etc. Following is summary of remarks on tests made by Mack engineers:- "The springing of the (Rolls-Royce) car is not exceptional, and much improvement is also possible in their cushioning. This is borne out by our instrument readings as well as by our personal observations." "Data shows that the vertical acceleration obtained in Rolls-Royce cars is comparatively high, our A.L.bus comparing quite favorably with them. Nevertheless we derived more comfort out of riding in the Rolls-Royce than in the A.L. because of the smoothness and ease of Rolls-Royce operation." | ||