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).
Brake wear and steering spring performance.
| Identifier | ExFiles\Box 171\3\ img248 | |
| Date | 18th July 1924 | |
| R.B. 495A (20H) (D.A. 652 29-3-24) J.E.D. -3- 9941 Expl. No. 9940 REF: Hs{Lord Ernest Hives - Chair}7/LG18.7.24. EXPERIMENTAL REPORT. adjustment was taken up on the front brakes. There was approximately three times the amount of wear on the rear brakes compared with the front. The rear drums were also badly scored. This wear confirms that we are getting most of the braking on the rear wheels and also owing to the servo, we also get considerably higher pressure on the rear brakes than we have ever had with the foot pressure. The cars were running with low brinnel brake drums. The brinnel of the brake drums has since been increased which should reduce the wear on the drums. Under the test conditions in France, we should estimate the brakes were used three or four times more severely than we should expect them to be used on the average cars. The servo has not needed any adjustment on either car in 10,000 miles. The amount of wear is negligible. STEERING. A number of the first springs which were sent out in the side steering tube, broke. These were afterwards replaced with springs having less maximum stress. The new springs, after 6,000 miles running, have not failed. Tests in France show that although the lighter springs in the side steering tube very considerably reduce the road shocks felt on the steering wheel, they do definitely increase the tendency for low speed steering wobbles. They have had cases of low speed steering wobbles which have been overcome by fitting the old standard stiff spring in the side steering tube. contd:- | ||