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).
Diagram and calculations for the Hispano clutch operating mechanism.
| Identifier | Morton\M4.2\ img001 | |
| Date | 17th April 1924 | |
| HISPANO CLUTCH DIAG OF OPERATING MECHANISM H.S/21 17.4.24 T.E.F. P1 10 1.38 3.30 6.325 FRICTION DISCS PLATE OPERATING PLATE -> 437 lbs TO JUST RELEASE CLUTCH TOTAL PRESS. ON FRICTION DISC = 437 * 3.3 / .6 = 2403 lbs AREA OF FRICTION DISC OUTSIDE DIAM = 13.44 INSIDE DIAM = 10.22. AREA = 54.8 □" PRESS. ON FRN. DISC = 2403 / 54.8 = 'pp 40 lbs/□" FOOT PRESS. REQ. TO JUST RELEASE CLUTCH = 437 x .2'24" x 1.38 / 6.325 x 10 = 23 lbs (APP) ACTUAL PRESSURE REQUIRED = 25 lbs | ||