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).
Axle control, Hotchkiss drive, and a General Motors device for eliminating crankshaft torsional vibration.
| Identifier | WestWitteringFiles\P\October1926-November1926\ Scan072 | |
| Date | 22th October 1926 guessed | |
| contd :- -7- are fitted giving axle control and enabling a Hotchkiss drive to be used, see sketch. A number of cases of off-set rear springs were noticed arranged to give gretaer resistance to braking at this point. On the other hand, there are a number of cases where the rear springs have been off-set with the longer portion of the springs to the front of the car which is the reverse of beneficial for torque control. Presumably this is to bring the joggle in the frame into a convenient position. CRANKSHAFT TORSIONAL VIBRATION. General Motors have evolved a device which they maintain eliminates torsional vibration and which is fitted to all their cars. This consists of a piece of metal attached to the centre of the last throw of the crankshaft before the time gear end, and pivotted in the centre, its bearing being rigidly fixed to the web. This piece of metal is restrained from rotating on its pivot by two very strong leaf springs and is attached so that when the shaft is accelerating, it tends by inertia to fly away from its moorings. The claim is that when the torsional vibration of the shaft starts, the contd :- | ||