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).
Technical report discussing solutions for frame twisting and body rattles by proposing revised brackets and additional cross members.
| Identifier | WestWitteringFiles\K\October1923\ Scan118 | |
| Date | 12th October 1923 guessed | |
| (2) (4) That the brackets 2nd & 4th from the dash not being opposite cross members could twist the frame when quite a light load was applied to the end of the wooden lever corresponding to the runner. Whilst we are not sure or convinced that this flexibility is the entire cause of body rattles, after discussing the matter with Mr. Royce we have decided to take the following course immediately. (a) We propose designing a revised body bracket for brackets at 1. 2. & 3. from the dash, these having a large bearing area for the runner and extending from top to bottom flange of the frame. They will also project from the frame a 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. & 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 in 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 | ||