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).
Vehicle spring weights, durability, and potential weight savings.
| Identifier | ExFiles\Box 16\7\ Scan195 | |
| Date | 21th October 1929 guessed | |
| -2- that with these springs its depth should be reduced to 1.250 deep. With regard to spring weights. The present 1100 rear spring weighs 78.75 lbs, the 1050 front spring 40.25 lbs. The improvement in spring manufacture and the hydraulics together have increased spring life enormously. The Repair Dept. report that only one Phantom front spring has broken in service since hydraulic were fitted. We have been getting over 50 hours life on front springs on the bumper. We have never broken a Phantom II spring, front or rear, on the road. We therefore consider that we should be justified in asking the spring makers to save as much of the weight theoretically unnecessary with the present spring as possible. It is unfortunate that we cannot get the car down as much at the front as the back. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||