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 memorandum discussing the design of brackets, hinges, and a luggage grid for a vehicle body.
| Identifier | ExFiles\Box 67\2\ scan0013 | |
| Date | 28th January 1920 | |
| Contd. -2- RL/G28.1.20. same section as that used for the step irons, but I am not sure that this is a practical shape, owing to the narrowness of the frame, and the difficulty of bolting it where the cross member joins the frame. I do not suggest that you follow drawing LeC.178, but the design may be useful. The highly stressed type of hinge is easily applied if you make the bracket of sheet metal. The suggestion is that the sheet metal may be somewhere about .200" thick, but as it is an easy thing that could be cut out of a piece of sheet steel of fairly high elasticity, you could try several thicknesses. I do not think this type of bracket would do without the diagonal stay before mentioned, but with the diagonal stay it seems preferable to even the drop forging shewn on your drawing, which might be found an insufficiently rigid in front of the rear cross member at section marked up. DD Referring to the grid to carry the luggage, you will notice that I have suggested that it is made of tubing brazed up like a cycle frame. I think this would be quite practical and would give you a certain amount of lateral stability, which is required, and will help the brackets very materially, instead of throwing so much duty upon them in a lateral direction. We do not know why the centre of the grid is carried so high up, and you will observe in the drawing that we had made, that we fitted a bar or tube across the back of the body to keep the luggage off the [Upside down text at bottom right]: H.{Arthur M. Hanbury - Head Complaints} & S. 235a (T 100) S.T.S. (L) 846 6.S-19 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2460 [Handwritten text at bottom right]: Contd. | ||