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 for Spectre III road springs for the French market, detailing piece numbers, loads, and buffer clearances.
| Identifier | ExFiles\Box 91\4\ scan0027 | |
| Date | 19th June 1935 | |
| +300a 19.6.35. SPECTRECodename for Phantom III III ROAD SPRINGS FOR FRANCE. TABLE 1 FRONT N.S. - Outer: Piece No. G83271, Load 3710 lbs. at 5.437" N.S. - Inner: Piece No. G83270, Load 1841 lbs. at 5.087" O.S. - Outer: Piece No. G83271, Load 3696 lbs. at 5.437" O.S. - Inner: Piece No. G83270, Load 1869 lbs. at 5.087" REAR N.S.: Piece No. F86935, Load 1211 lbs. O.S.: Piece No. F86935, Load 1218 lbs. .375" thick packing had to be fitted inside the front spring pot in order to get the following buffer clearances :- TABLE 2 FRONT - N.S. Empty: Bump 1.412", Rebound 1.950" 4 persons: Bump 1.350", Rebound 2.050" FRONT - O.S. Empty: Bump 1.300", Rebound 2.075" 4 persons: Bump 1.175", Rebound 2.200" REAR - N.S. Empty: Bump 4.687" 4 persons: Bump 4" REAR - O.S. Empty: Bump 4.500" 4 persons: Bump 4" Hs{Lord Ernest Hives - Chair}/Les.{Ivan A. Leslie} | ||