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 for front and rear springs, damper loads, car weight, and buffer clearances.
| Identifier | ExFiles\Box 106\1\ scan0231 | |
| Date | 17th April 1931 guessed | |
| 18.G.IV. Springing. Front Springs. Piece No. F.57498. N.S. O.S. Loaded lbs. 672. 670. Loaded camber. 1" Pos. 1" Pos. Initial camber. 4.937 4.968. Rear Springs. Loaded lbs. 1054 1056 Loaded camber. 1/2" Neg. 1/2" Neg. Initial camber. 6.56" 6.58" Damper Loads. Front.- 115/90 lbs. H.P. valve drilled .055" dia. Rear. - 115/90 lbs. H.P. valve drilled .055" dia. Car Weight. (Unladen) One spare wheel at rear. Front. 15 cwt 3 qrs 7 lbs. Rear. 20 cwt 0 qrs 14 lbs. Total. 36 cwt 0 qrs 0 lbs. Buffer Clearances. N.S. O.S. No Passengers. Front 2.218" 2.375" Rear 4.937" 4.81" 4 Passengers Front 1.937" 2.125" Rear 3.781" 3.625" | ||