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 for a Hardy coupling for a clutch.
| Identifier | ExFiles\Box 5\6\ 06-page046 | |
| Date | 28th November 1930 | |
| Hs{Lord Ernest Hives - Chair} 374 No 7/11/30 S.L. FRICTION PLATE & RATIO ALTERED TO NEW DRAWING 28/11/30 S.L. HARDY COUPLING FOR CLUTCH L.S. 2830 HARDY FABRIC HS{Lord Ernest Hives - Chair} 52 SIMILAR DIMENSIONS & SPLINES TO GS 2834 SECTION H.S.C. 4.900 DIA 8.425 .650 .125 .250 LEFT DIAGRAM: A B 20° 20° R.S. 6.500 Dia 11.250 DIA 9.900 Dia CTS{C. Trot Salt - Carburation} 8.430 Dia C.H. 4 HOLES .184 F.T. RIGHT DIAGRAM: A B C D E 22° 30' 22° 30' R.S. 1.400 DIA 5.480 DIA CTS{C. Trot Salt - Carburation} 6.500 DIA 4 HOLES .184 FIT | ||