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 a large diameter spring for the Phantom III Continental radiator steam valve.
| Identifier | ExFiles\Box 92\6\ scan0085 | |
| Date | 7th January 1937 guessed | |
| LARGE DIA. SPRING FOR PHANTOM III CONTINETAL RADIATOR. STEAM VALVE. Dia. of wire .104. (S/CS). Mean dia. of coils 1.400. No. of coils (Working) 5 Total no of coils 7 Free length 1.920 Loan at .700 (Length in position 14.8 lbs. | ||