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).
Frame rigidity, cross members, and body mounting for the 40/50 and Goshawk models.
| Identifier | ExFiles\Box 41\4\ Scan191 | |
| Date | 12th October 1923 guessed | |
| contd: -2- distance of about 4" and the bolt hole for the body which we propose to drill ourselves will be as near to the frame as possible so as to give a good control to the runner, preventing it from turning over. This overcomes objections 1. 2. and 3. (b) With reference to the twisting of the frame we propose fitting a cross member just behind the battery box right opposite bracket No.4. from the dash. This cross member will prevent the frame twisting and will serve as a support for the battery box which we understand is at present liable to collapse. (c) With reference to the twisting of the frame at bracket No.2. from the dash we suggest that there is no reason why a body cross member could not be placed at this point in practically every car, and we suggest that RR. should recommend this to coachbuilders. The tests on the 40/50 as shewn sketch No.2. seem to demonstrate that the 40/50 frame and method of attaching the body to it is much more rigid than the Goshawk at present. With reference to our scheme for isolating the body on sheet metal body stiffeners we shall go into the question of providing adequate cross members for the body when using this scheme and will take the matter up with Messrs. Barker's as soon as we have made some designs for the purpose, in fact we propose designing the whole of the ironing of the body and shall endeavour to use sheet metal in every. case. Since however this matter is highly experimental, and we must do something to production cars we shall go along with the improved body bracket scheme as soon as possible, and will also continue experiments with tie-bar con | ||