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).
Specifications and ordering instructions for front and rear road springs.
| Identifier | ExFiles\Box 67a\2\ scan0093 | |
| Date | 3rd January 1928 | |
| C. Hs{Lord Ernest Hives - Chair}/Am. 78410 BY/HEBS/M.3.1.28. EAC. 14. FRONT & REAR ROAD SPRINGS SECS:7020/30. Further to our memo' BY/HEB{H. Biraben}2/M.24.10.27. by which we ordered special cambered springs for the above chassis, the Expl: Dept require the following springs in addition to those already instructed:- F.78264 Rear Road Spring 1550 lbs(1500+Wide) Stiffer Type. 4 off. (With modified cambers as shown in table below). F.77917 Front Road Spring 1000 lbs. 4 off. - Cellen to 1050 lbs (With modified cambers as shown in table below). | SPRING. | FREE CAMBER. | CAMBER UNDER LOAD. | |---|---|---| | Rear { Standard F.10668. | 1.900 | .500(Neg:) | | Rear { EAC.14. F.78264. | 1.400 | 1.000(Neg:) | | Front { Standard F.71978. | 2.600 | .500 | | Front { EAC.14. F.77917. | 2.100 | 1.000 | Will you therefore please order the above and request Messrs. Firth's to keep down the weight as far as possible compatible with design requirements, noting that the springs must be fitted with R.R. Type Clips. The position of the clips on the Front Springs, must be in accordance with the sketch for springs F.78164 ordered for EAC.8 by BY/HEB{H. Biraben}7/M.21.12.27. The clip positions for the Rear Springs must be as approved for fitting R.R. clips on Standard Phantom Rear springs. RECEIVED 4 JAN 1928 BY/HEB.{H. Biraben} KAB | ||