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).
Test report on torque reaction dampers and their effects on vehicle performance and comfort.
| Identifier | ExFiles\Box 137\4\ scan0364 | |
| Date | 4th July 1931 guessed | |
| contd. -2- 2nd. Test. Conditions. Torque reaction dampers had all friction removed. Torque reaction and its effect on front wings. This came on at 8 MPH, maximum at 10 MPH, finished at 11 MPH. The reaction under these conditions caused more amplitude in the movement of the side lamps. The gear lever period was considerably worse - more amplitude. It started at 7 MPH, maximum 9 and finished at 11 MPH. The value we should put down is 60%. There was also a pronounced rattle at these speeds from the engine due to slackness. Booms. In Front Seats. These were not considered to be at all pronounced. There was a period which started at 18 MPH, maximum 25, finished at 30. All windows were closed and partition window closed. A period was noticed at 40 MPH, on the retard. In Rear Seats. There was no definite period, we considered it to be very good. Jellying of the front wings was considerable. There were violent periods throughout the range of speed. The steering was not affected in regard to stability. The oscillation of the steering wheel was more rapid, but of no greater intensity. 3rd. Test. Conditions. Torque reaction dampers set to have a friction load of 30 lbs. taken at a leverage of 5.25 inches. Torque Reaction. The effect of the torque reaction was of less amplitude. It started at 9 MPH, maximum 10 and finished at 13 MPH. This was considered to be quite passable. The gear lever period was of less amplitude. It started at 10, finished at 12, came on again at 13 and finished at 14. This would be considered to be good. | ||