The results of steering and damper tests under various load conditions.
| Identifier | ExFiles\Box 11\2\ 02-page216 | |
| Date | 25th April 1929 | |
| To Hs. {Lord Ernest Hives - Chair} and Rm. {William Robotham - Chief Engineer} From G.W.H. 47941 64 Hotel de France Chateauroux(French test region) Indre 25/4/29 STEERING Tests with 2 1/2° and 3 1/2° lean of pivots. We do not find any appreciable difference between 3 1/2° and 2 1/2° lean of pivots. It would be hard to say that either lean of pivots gives definite results. Jeggles are aproximatly the same generally. If anything the 3 1/2° is better at lower speeds, 10 to 30 M.P.H. We have received your letter of the 23 rd, you will have observed that in our report we gave you results of our tests with damper loadings. To classify them as far as we have gone is as follows:- 100% riding and steadiness of car. Rear dampers 100 lbs L and 100 lbs HP no restrictions. Front dampers 65 lbs L and 65 lbs HP with restrictions. 85% riding and steadiness of car Rear dampers 75 lbs L and 75 lbs HP no restrictions Front dampers 65 lbs L and 65 lbs HP with restrictions 50% riding and steadiness of car Rear dampers 50 lbs L and 50 lbs HP with restrictions 50% Rear dampers 50 lbs L and 100 lbs HP no restrictions Further tests with front dampers to be carried out for steering tests. The buffer clearances with the 100% settings are with four passengers in the rear:- Rear O.S. 3.250" N.S. 3.500" Front O.S. 1.00"* N.S. 1.00" No passengers:- Rear O.S. 4.625" N.S. 4.500" Front O.S. 1.00"* N.S. 1.00" We have tried the side steering tube taken off 15 EX (N.SCH EX 2258). The results are, shocks are 20% more severe, more rapid, jeggles more pronounced at medium speeds, and at 60-64 M.P.H. also at higher speeds 70 - 75 M.P.H. there are jeggles which we did not have with it's own side steering tube. The set up of the springs was .250" front and rear. G.W.H. * SMALL FRONT BUFFER CLEARANCE DUE TO BUFFERS BEING PACKED UP TO PREVENT CROSS STEERING TUBE HITTING DAMPERS | ||
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).