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).
Effects of adjusting torque reaction dampers on vehicle oscillations, steering, and noise.
| Identifier | ExFiles\Box 11\3\ 03-page385 | |
| Date | 3rd July 1931 guessed | |
| (2) oscillation of the front side lamps and wings. There was also a definite period on the change speed lever. This period started at 10 MPH with a maximum velocity at 12 MPH lasting up to 15 MPH. There was a further crisp period from 16 - 18 MPH. Furthermore the car felt very rigid and rattles were general. We find that as we slacken off the torque reaction dampers the following items are changed :- (1) Steering joggles are increased in amplitude and velocity. (2) Jellying is increased. (3) Booms in the front seats are decreased. (4) Booms in the rear seats entirely disappeared. (5) Torque reaction is decreased but the period is of longer duration. We find that the best all round results are obtained by setting the shock damper friction load at approx. 40 lbs, taken at a radius of 5.25 ins. The results with this setting are then as follows:- (1) The steering is made slightly worse from the oscillation point of view. (2) Jellying is approx. 75% cured. (3) Booms in the front seats are of not sufficient volume to be called a complaint. (4) Booms in the rear seats are approx. non existent. (5) Torque reaction is not so pronounced but is of longer duration. The torque reaction effect on the change speed lever is considerably reduced. The period at 61 MPH felt on the clutch pedal and also noticed on the change speed lever is eliminated. G.WH. G.W.Hancock. | ||