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).
Analysis of friction torque in steering components under various load and configuration conditions.
| Identifier | ExFiles\Box 67\2\ scan0275 | |
| Date | 26th January 1928 guessed | |
| contd :- -2- find that the friction torque due to the car wt. does not go up in direct proportion to the number of surfaces employed due to there being a small constant occasioned by the cross winding in the pivot under load application. We therefore get practically, using a spring load of 825 lbs :- Stationary friction torque 520 ins.lbs. Friction torque in motion. 520 ins.lbs. Reverting to three friction plates with no spring, we get stationary friction torque. 950 ins.lbs. Friction torque in motion. 475 ins.lbs. The steering with this arrangement seems to have a tendency to tighten up when shunting possibly due to the lubricating film of oil being poorly maintained under the heavy loads. Naturally any variation due to this is three times as great with the three plates as with the single friction surface in the standard axle. The latter has the added advantage of a fully floating thrust washer. With the springs in the pivots giving 600 lbs. load (to G.75402) we get :- Stationary friction 650 lbs. Running friction. 520 lbs. Tabulating the results therefore we have :- contd :- | ||