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).
Technical note on clutch and suspension design, comparing with American automotive practices.
| Identifier | ExFiles\Box 173\1\ img411 | |
| Date | 6th February 1934 guessed | |
| II Clutches. Cadillacs are experimenting with the same Long single plate Clutch as Lincoln are using. They gave me the following figures. Facing 12'x2x7 Pressure 1000 lbs. Pedal Travel 4.00" Separation .050 Pedal Pressure 26lbs. Cushioning .030. The pedal pressure seems to be incredibly low compared with ours but the Americans put up with over 5" effective pedal travel. Suspension. Have been following Oy's efforts to get productions Cars to ride well. Results now good. The slightest friction or excess damping on the front causes pitching in the rear & ruins the ride. It seems that a little friction is desirable in the rear springs to keep the back axle from dithering, Oy is actually fitting friction strips between the two top leaves of the rear springs. Can we compare the effect of reducing unsprung wt on axle dither by making a test with and without the rear brake drums. These independantly sprung | ||