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, wheel movements, and spring hysteresis for a vehicle.
| Identifier | ExFiles\Box 126\2\ scan0111 | |
| Date | 3rd April 1939 | |
| -2- Rm{William Robotham - Chief Engineer}/FWK.1/JH.3.4.39. Spring Rates. O.S.F. 140 lb/in. Δ = 5.7"U.L. 5.95"L. N.S.F. 140 lb/in. Δ = 5.3"U.L. 5.65"L. O.S.R. 169 lb/in. Δ = 4.3"U.L. 5.2"L. N.S.R. 169 lb/in. Δ = 4.48"U.L. 5.65"L. Front roll rating 137 lb/in. Δ = 6.08" O.S. Δ = 5.8" N.S. Rear roll rating 172 lb/in. Δ = 5.13" O.S. Δ = 5.56" N.S. Roll bar fitted on rear. Front wheel Movements. Metal Cont. Buffer Cont. Laden. Unladen. Full reb. O.S. 0 2" 3 7/16" 3 9/16" 7 1/8". N.S. 0 2" 3" 3 1/2" 7 3/16". Rear wheel Movements. O.S. 0 2" 5 1/8" 6" 8 1/8". N.S. 0 2" 4 3/16" 5" 7 1/2". Rear spring hysteresis = 80 lb. Front spring hysteresis = 130 lb. Rm{William Robotham - Chief Engineer}/FWK. | ||