Specification sheet for the springing system of a 25-EX model, detailing settings for front and rear springs, damper loads, and buffer clearances.
| Identifier | ExFiles\Box 169\1\ img153 | |
| Date | 7th March 1931 | |
| To Ha/Rm. {William Robotham - Chief Engineer} From Ha/Lid. {A. J. Lidsey} X4663 Ha/Lid. {A. J. Lidsey} 2/KT.7.3.31. 25-EX. Springing. Front Springs. Piece No. F.78797. N.S. O.S. Loaded lbs. 1080 1096 Loaded camber. Flat. Flat. Initial camber. 4.45" -.50" Rear Springs. Piece No. F.79449. N.S. O.S. Loaded lbs. 1320 1320 Loaded camber. Flat. Flat. Initial camber. 10.30" 10.28" Damper Loads. Front. - 110/110 lbs. No leak. Rear. - 90/90 lbs. H.P. valves drilled 2 holes .038" dia. Car weight. (Unladen) One spare wheel at rear. Front. 21 cwt 3 qrs 7 lbs. Rear. 27 cwt 0 qrs 14 lbs. Total. 48 cwt 3 qrs 21 lbs. Buffer Clearances. N.S. O.S. No Passengers. Front 1.9" 2.2" Rear 5.1" 5.5" + Passengers. Front 1.8" 2.0" Rear 4.1" 4.4" | ||
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).