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 spring rates, roll ratings, and wheel movements.
| Identifier | ExFiles\Box 154a\4\ scan0099 | |
| Date | 1st March 1939 | |
| -6- Rm {William Robotham - Chief Engineer} /FWK.6/JH.1-3-39. Spring Rates. N.S.F. 110 lb/in. Δ = 8.35"U.L. 9.35"L. O.S.F. 102 lb/in. Δ = 9.45"U.L. 10.75"L. N.S.R. 146 lb/in. Δ = 5.35"U.L. 6.59"L. O.S.R. 148 lb/in. Δ = 5.35"U.L. 6.50"L. Roll Rating. Front roll rating = 307 lb/in at wheel. Rear roll rating = 62.5 lb/in at wheel. Front roll bar fitted. Front wheel Movements. Choc. B. Buffer Cont. Laden. Unladen. Reb. Buffer. Contact. Metal. Contact. O.S. 0 1½" 2½" 3½" 5¾" 7¼" N.S. 0 1½" 3¼" 3¾" 6½" 7½" Rear wheel Movements. Metal Conact. Buffer Contact. Laden. Unladen. Full Rebound. O.S. 0" 1½" 5¾" 6½" 12½" N.S. 0" 1½" 5½" 7" 12½" Rm {William Robotham - Chief Engineer} /F.W.Kennington. | ||