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).
Specification sheet detailing suspension characteristics and measurements.
| Identifier | ExFiles\Box 22\1\ Scan324 | |
| Date | 23th November 1932 | |
| -3- Ha/Rn.{Mr Robinson}S/MA.23.11.32. Cont'd.{John DeLooze - Company Secretary} (1) Suspension. (a) Spring Rating. Front 100 lbs/1" Rear 80 lbs/1" (b) Wheel Movement. Allowed. The "stop" is the coil springs coming choc a bloc. Front. Bump 2½" Rebound. 3½" Rear Bump 3.5" Rebound. 6½" (c) Ratio Spring Movement to Wheel Movement. Front 1 - 4 Rear 1 - 4.3 (d) Weight of System. Weight of one complete box containing springs and plungers and wheel arm and bearing but no stub axle. 65 lbs. (e) Increase of spring rating with wheel movement. There are not double rating springs employed but an increase in rating of 2-1 is claimed when approaching maximum bump. This we doubt. | ||