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 on different engine mounting configurations and their effects on steering, clutch, and vibrations.
Identifier | ExFiles\Box 11\5\ 05-page195 | |
Date | 14th September 1934 | |
Wyman Please note & return Rm{William Robotham - Chief Engineer} 4794/ Hotel de France, Chateauroux. Indre. France. Seen t To Hs.{Lord Ernest Hives - Chair} From G.W.H. E Please return 28 - EX. 14th September 1934. We have now completed our tests with the engine mounting and obtained satisfactory results. You will, no doubt, not believe them, but they have been verified and all possible snags carefully watched, even to the changing of the road surface. The results are given in the following order as tested. 1. Front anchorage fitted only, rubber mounting as fitted maintained, stay from pedals to engine dismantled. 1. No improvement to steering. 2. Bad period of engine brought down from 8 MPH. to 6 MPH. 3. Engagement of clutch smooth, except on steep incline. 2. Torque reaction dampers fitted in conjunction with the above set with a dry friction load of 35 lbs. 1. The steering as good as when car returned from last trip, no amount of braking will produce tramping, although the front control arms are a deciding factor with regard to this. 2. Clutch. The engagement is smooth under all conditions. 3. Engine periods at slow speeds as standard production. 4. Wings and lamp movement 75% less than previous. 3. Standard engine feet fitted in conjunction with previous modifications. 1. Made no difference to steering. 2. Made no difference to clutch engagement. 3. Engine period at low speeds rougher. 4. Wing movement no different to above. 5. Booms at 25 - 35 MPH. more pronounced. | ||