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).
The specifications for Spectre front road springs.
| Identifier | ExFiles\Box 95\3\ scan0033 | |
| Date | 22th September 1934 | |
| x4644 346 To RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/Les.19/KW.22.9.34. SpectreCodename for Phantom III Front Road Springs. In using such low rating front road springs with wheel movement, it is essential that we should be particularly accurate with the spring poundages and ratings. Therefore before fittings springs to a chassis will you please check the following details and include them in your chassis specifications :- (1) Free length of both inner and outer springs. (2) Minimum useful load of springs at 8.150" for outer springs and 7.837" for inner springs. (3) Normal load of springs at 7" for outer springs and 6.687" for inner springs. (4) Maximum useful load of springs at 5.500" for outer springs and 5.187" for inner springs. (5) Space for springs when levers are in position to give the drawing buffer clearances. Will you please take these particulars of the first SpectreCodename for Phantom III next time that the springs need to be removed. Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} | ||