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 Phantom II clutch spring.
| Identifier | ExFiles\Box 13\7\ 07-page125 | |
| Date | 17th June 1932 | |
| Hs{Lord Ernest Hives - Chair} 652 DIA OF WIRE .232 - 4 S.W.G INSIDE DIA OF HELIX 1.000 ±5 8 WORKING COILS WITH HALF A COIL GROUND SQUARE EACH END) MAKING A TOTAL OF 9 COILS Ld) WHEN COMPRESSED TO 2.550 TO BE 253 lbs +5 lbs FREE LENGTH 3.380 R = 307 LBS/IN S = 76000 lbs/☐"/in CLUTCH SPRING PII ROLLS-ROYCE, LTD. PRINT ROOM JUN 17 1932 DERBY. | ||