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 lower rating springs required for model 18-G4.
| Identifier | ExFiles\Box 52\2\ Scan263 | |
| Date | 18th December 1930 guessed | |
| LOWER RATING SPRINGS REQUIRED FOR 18-G4. FRONT - 50% Increase in deflection. Loaded lbs. 650. Loaded Camber Flat. Initial Camber 3.375" Max. Bump. 2.2" Neg. Length 38" Material S/SLM. REAR - 25% Increase in deflection. Loaded lbs. 950. Loaded Camber .5" Neg. Initial Camber 5.9" Max. Bump. 4.75" Neg. Length 56" Material S/SLM. Hs {Lord Ernest Hives - Chair} /AJL. | ||