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).
Order and design discussion for Phantom II road springs.
| Identifier | ExFiles\Box 16\7\ Scan343 | |
| Date | 29th November 1930 | |
| O.O. From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X7410. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/MJ.29.11.30. X.4429. X.7410. Will you please order the following Phantom 11 road springs for us :- 4 Front. F.78792. Free Camber 4.5". Loaded Camber Flat. Max. Bump 2.5" Neg. 1100 lbs. 4. Rear. F.79439. Free Camber 10.25". Loaded. Flat. Max. Bump. 4.5" Neg. 1350 lbs. We should like Messrs. Firths to submit a design to us of the front spring which they think will give us a reasonable life. We consider that this will have to have more leaves in it than the standard front spring in order to maintain a reasonable stress. With regard to the rear spring we think that no alteration in design will be necessary to take care of the increased deflection but should like Messrs. Firths views on the subject. It should be explained to them that we want these springs to be a production proposition, and their design should therefore be treated as such. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||