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).
Mechanical efficiency test data for a La Salle steering box under static conditions.
| Identifier | ExFiles\Box 106\3\ scan0275 | |
| Date | 11th June 1934 | |
| 11.6.34. Mechanical Efficiency of La{L. A. Archer} Salle Steering Box. The table below shows the efficiency of the La{L. A. Archer} Salle steering box measured in forward and reverse drive under static conditions. The ratio of angular movement of the steering wheel to that of the pendulum lever is 15.7 at the centre of the travel. The efficiencies below are measured at mid-travel. Table Data: | Load on Pendulum Lever - lbs. | Pendulum Lever Torque. lbs. ins. | Efficiency of Transmission (Forward) | Efficiency of Transmission (Reverse.) | |---|---|---|---| | 100 | 650 | 63.5 | 63.7 | | 150 | 975 | 67.3 | 69.3 | | 200 | 1300 | 70.7 | 72.0 | | 250 | 1625 | 70.0 | 71.7 | | 300 | 1950 | 70.7 | 72.6 | | 350 | 2275 | 69.9 | 72.3 | | 400 | 2600 | 70.7 | 72.8 | | ||