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).
From 'R' to 'J' discussing the design and reinforcement of spring plates for weight economy.
| Identifier | ExFiles\Box 80\3\ scan0036 | |
| Date | 24th March 1914 | |
| H.R. 288A (150 H) (V V.{VIENNA} 681 12-3-14) G 0414. To J.{Mr Johnson W.M.} from R.{Sir Henry Royce} 2. R8/P 24. 3. 14. Referring to the length of the second plate, theoretically this need only commence when the top plate becomes too weak to carry the load, and as this particular top plate has very little to do, except to take this bending stress, I think the second plate might commence wherever convenient, somewhere between the theoretical position and the eye. The point is that if we reinforce any part of the plate, we not only prevent that part taking any of the deflection, and the reinforcement piece also taking any deflection, but we throw the deflection on the rest of the spring, which is very uneconomical for weight. With reference to the thicker plates on 2704, these seem to work quite satisfactorily, and I understand are not unreasonably heavily stressed. Perhaps if we made them a little thinner, and instead of the ends being sheared to a long and tapering point with the flat end, they ought to be brought with a quicker tapering to a closer point. MADE AT CROXLEY | ||