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).
Blueprint detailing the specifications for a valve spring nicknamed 'China'.
| Identifier | ExFiles\Box 181\M13\M13.2\ img139 | |
| Date | 28th November 1931 | |
| Hs{Lord Ernest Hives - Chair} 477 VALVE SPRING "CHINA" STAMP: ROLLS-ROYCE LTD. PRINT ROOM 28 NOV 31 DERBY. ·975 DIA +·010 -·000 INSIDE 1·845 FREE LENGTH 1·100 DIA +·000 -·010 OUTSIDE R = 115 lbs/IN S = 85000 /IN DIA OF WIRE ·160 5 WORKING COILS AND 3/4 OF A COIL GROUND SQUARE EACH END MAKING A TOTAL OF 6 1/2 COILS LOAD AT 1·450 = 46 lbs " " 1·100 = 86 " STRESS 34000 " 64000 | ||