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).
Car velocities under different conditions and a description of an axle motion experiment.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan205 | |
| Date | 29th October 1928 guessed | |
| contd :- -4- CAR VELOCITIES IN EXCEPTIONAL CIRCUMSTANCES WHEN THE AXLE IS WELL DAMPED. ft/sec. Hump backed bridge 35 m.p.h. 1.4 40 m.p.h. 3.7 Level crossing. 35 m.p.h. 1.15 40 m.p.h. 1.75 Ditto - axle undamped. Hump backed bridge 35 m.p.h. 3.75 Level crossing. 35 m.p.h. 2.6 ------------------- AXLE MOTION EXPERIMENTS. We have made an attachment for the Chronograph to draw diagrams on a moving strip of paper indicating the movements of the back axle of a Phantom relative to the car on various road surfaces. Another pen marks time in tenths of a second on the same strip of paper. The pen indicating axle movement is connected to the axle by linkage of variable ratio, so that we can use the full width of the paper strip to shew any sized axle movement. The linkage is anchored to the axle at the shock absorber bracket. From here a light tubular rod rises vertically and operates an arm which rotates a pulley. The radius of the pulley is about 1/4 that of the arm. A piece of special thin inextensible string is wound round the pulley and connected to move reducing levers which operate the pen. Graphs of axle movement are shewn on the attached two sheets. These are tracings of the axle movement pen and the time-marks. contd :- | ||