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).
Clutch modifications for a 20 HP 10,000-mile test, including increasing spring load and pedal stroke.
| Identifier | ExFiles\Box 5a\2\ 02-page152 | |
| Date | 6th February 1930 | |
| BY.{R.W. Bailey - Chief Engineer} From Da.{Bernard Day - Chassis Design} c. to Hs.{Lord Ernest Hives - Chair} S840 Da.{Bernard Day - Chassis Design}1/WJ.6.2.30. xS840 rS{Sir Henry Royce's Secretary}300 20 HP. for 10,000 Mile Test. CLUTCH. We wish to increase the load of the clutch springs to compensate for the increase of torque with the larger engine. We suggest that the increase should be 20%. Will you please set this out. We suggest also that the stroke of the pedal should be increased 20% to retain the spring foot load now lost. Da.{Bernard Day - Chassis Design} | ||