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).
Results of road tests on vehicle component movement and vibration.
| Identifier | ExFiles\Box 28\5\ Scan089 | |
| Date | 14th July 1932 guessed | |
| -2- (1) Test on a fairly good tarmac road up to speeds of 70 m.p.h. (2) Torque reaction dampers set at 10 lbs. (3) Bonnet given normal clearance at either end. (4) Speed 30 - 35 m.p.h. Result. (1) The movement of the radiator sideways was of a slow period and small amplitude. It would scarcely have been observed without a mascot fitted. (2) Bonnet movement endways was very little. There was no lifting up at the back corners or front as was the case when received. (3) N.S. front wing movement was considerable. O.S. front wing was steady. (4) There was no appreciable difference in the steering joggles. (5) There was no sign of the slow wobole at 60 m.p.h. The steeringwas quite steady. On pot holey road. (Test 1) cont'd.{John DeLooze - Company Secretary} (1) Movement of radiator sideways 75% less than when received and the period of movement was appreciably slower. (2) Bonnet movement endways was 75% less. Bonnet knocks reduced by 75%. (3) N.S. front wing still flapped. O.S. front wing very little movement, no jellying. (4) Headlamps quite steady. (5) Movement of scuttle not affected. ---------- (Test 2). The N.S. front Hartford shock damper was checked up and found to have approx. half the load of the O.S. It was therefore tightened up. | ||