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 detailing modifications and results for reducing bonnet and radiator movement.
Identifier | ExFiles\Box 11\3\ 03-page380 | |
Date | 1st July 1931 guessed | |
(63) (b) Bonnet on (c) Rubbers to locate radiator in horizontal plain. (d) Longer and more flexible top water connection. Result. The period of the radiator in a vertical plain was eliminated. The relative movement between the bonnet and the scuttle from 0 - 40 m.p.h. was less than yet recorded. At 60 m.p.h. an intermittent sharp movement of the bonnet caused it to just touch the scuttle. TEST VIII. (a) V.{VIENNA} stay tubes. (b) Bonnet on (c) Rubbers to locate radiator in horizontal plain. (d) Longer top water connection. Result. At 20 m.p.h. and 40 m.p.h. the bonnet moves with a period from the radiator. This movement at these speeds is greater than that of the same road speeds in the previous test. At 60 m.p.h. it is not worse than at 40 m.p.h. The bonnet does not actually touch the scuttle through the whole range speed. TEST IX. (a) Rubber buffers fixed to the dash 9" above the bonnet strip so that the movement of the bonnet towards the scuttle is limited by the buffers being in contact against the angle bracket stiffener of the bonnet side. (b) Longer and more flexible top water connection. (c) Single radiator to dash stay tube. (d) No control springs for radiator. Result. Radiator appears stationary from inside the car. Bonnet movement considerably reduced. No sign of the bonnet touching the scuttle. The car was now taken on the worst roads known which we imagine are inferior to those at Le CanadelHenry Royce's French residence; and the bonnet under the most severe conditions was not made to touch the scuttle. | ||