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).
Design drawing for a Hardy Coupling for a clutch.
| Identifier | ExFiles\Box 104\4\ scan0033 | |
| Date | 10th July 1931 guessed | |
| Hs{Lord Ernest Hives - Chair} 374 HARDY COUPLING FOR CLUTCH L C 2830 LEFT VIEW: 6.500 DIA 4.250 DIA 6.450 DIA CTS{C. Trot Salt - Carburation} 4 HOLES 1 BA FIT 20º 50' Rad Rolling A B C SECTION VIEW: SECTION ABC ·950 SEC ·050 HARDY FRASIB Hs{Lord Ernest Hives - Chair} 375 OTHER DIMENSIONS & SPLINES TO G 54334 ·650 ·125 5.425 ·250 4.900 DIA RIGHT VIEW: Rad 20º 50' 6.500 DIA 4.400 DIA 6.450 DIA CTS{C. Trot Salt - Carburation} 4 HOLES 1 BA FIT FRICTION PLATE G 54340 RIVETED TO MAX TRAVEL INSIDE DIA A B C | ||