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).
Modification of a Michelin jack to make it suitable for their vehicles, specifically by reducing its height.
| Identifier | ExFiles\Box 37\3\ scan 051 | |
| Date | 30th June 1919 | |
| H.H. 280 A (100 T) :N.F. 575. 16-4-19: G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2334 To EH. from R.{Sir Henry Royce} c. to CJ. c. to DA.{Bernard Day - Chassis Design} R7/G30.6.19. X.3175 ✓ RE PADS FOR JACKS X.391 We hope that progress has been made to supply the pads all one height. I have not yet received the drawing from Mr. Day. On examination of the Michelin jack, we find it has an extension, which is excellent for general purposes, and as it is, would serve its purpose thoroughly well, but the whole jack is about 2" too high for 895 wheels and our front axle. Can we get one as near as possible the same in every respect, but 10" high instead of 12". The extension should be exactly the difference between the pads on the front and back axles. The handling would then be as follows. The jack is carried on the car and screwed to its lowest position; for a front axle it is quite ready. R.{Sir Henry Royce} | ||