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).
Sleeve drive torque, including friction, inertia, and potential rattles in worm gears.
| Identifier | ExFiles\Box 133\2\ scan0158 | |
| Date | 20th June 1935 | |
| -4- Hs{Lord Ernest Hives - Chair}/Smth.6/KW.20.6.35. Sleeve Drive Torque. The friction torque is indeterminate, but the sleeve should be made about .100" thick to avoid excessive peaks at the instant of firing. Owing to the combined reciprocation and rotation of the sleeve there is an oscillating inertia torque on the sleeve drive which completes a cycle every revolution of the engine. The maximum magnitude of this in a 3 1/2" bore engine is + or - 5 lbs.ft. per cylinder at 5,000 r.p.m. This will be much greater than the average friction torque, so that at high speeds there will be torque reversal in the individual sleeve drives which may give rise to rattles in the worm gears. Hs{Lord Ernest Hives - Chair}/Smth. | ||