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 analysis of a car's coil spring suspension system, detailing its operation and performance characteristics.
| Identifier | ExFiles\Box 67a\1\ scan0183 | |
| Date | 29th April 1926 guessed | |
| contd :- -2- The sprung weight of the car is normally carried by a main coil spring - considering one side only - which has a rating of 85.5 lbs/inch, and an initial static deflection, due to the weight of the car and passengers of 7.8". (See diagrammatic sketch). This spring has a further 2.55" movement before the auxiliary spring, of rating 1073 lbs/in., and which has no initial deflection, comes into operation. The total possible upward movement of the wheel from its mean riding position is 3.130" and in this fully deflected position the total spring reaction would be 1857 lbs. With regard to the downward deflection or rebound, of the spring, it has a possible movement from its mean riding position of .935" under the action of the main spring only before it is resisted by the rebound spring of rating 3360 lbs/in. From its mean position the road wheel can move downwards 1.30" before restricted by the clearance of the casing and when in this extreme position the resulting upward thrust would be 670 lbs. The appended load-extension diagram shews more clearly the action of these springs. Some of the chief points noted from this diagram are :- contd :- [Diagram Text] FREE TRAVEL BEFORE COMPRESSING AUXILIARY SPG FRAME MAIN SPRING AUXILIARY SPRING BUFFER SPG. ROAD REACH | ||