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 7' deflection front road springs for the Spectre model.
| Identifier | ExFiles\Box 95\3\ scan0051 | |
| Date | 15th December 1934 guessed | |
| X346 7" Deflection Front Road Springs - SpectreCodename for Phantom III HS.{Lord Ernest Hives - Chair}1557/8. Outer Inner Free length 9.590 9.240 Wire size .660 .500 Mean radius 2.100 1.500 Working coils 4 1/2 8 Load when compressed an amount of 4.100 3280 1810 Rate (lbs/in.) 800 440 | ||