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).
Page from a paper discussing methods for identifying and measuring vehicle wobble and vibration.
| Identifier | ExFiles\Box 29\1\ Scan100 | |
| Date | 8th October 1925 guessed | |
| contd :- -3- (3) IDENTIFICATION OF THE PRINCIPAL PARTS IN THE STEERING SYSTEM. In order to avoid any misunderstanding, we shew in illustration 1. the names of the parts which will be most often used in the description of wobbles in the paper. (4) OBSERVATIONS WHEN MEASURING THE PHENOMENON. (1) Numerous tests on the road with friction (2) Registering all the vibration of the wheels and the front axle by means of electro magnet apparatus which consists of a pully P. (see photograph 'A') on a flexible rod which makes contact electrically and registers each time when the wheel of the brake drum has just struck it. A disc actuated by clock-work on which is inscribed a continuous line, takes the record, making one complete turn in 7 secs. A metallic contact mounted on one of the wheels records the revolutions per minute at the same time. We include at the end of the paper some interesting examples of these diagrams. (3) Observation of the phenomenon by means of a slow motion kinema - 150 to 200 photos per second with the apparatus mounted sometimes on the chassis of the car, and sometimes on the front of another car towing the one which is wobbling. At the end of the paper are a number of interesting kinematograph pictures. (5) INTERPRETATION OF THE RESULTS. Tests carried out on the 12 HP. Renault previously mentioned fitted front and rear with contd :- | ||