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 of a La Salle steering box under static conditions.
| Identifier | ExFiles\Box 28\3\ Scan025 | |
| Date | 11th June 1934 | |
| COPY 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 19.7 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 (Handwritten numbers on the right side of the table) 64 96 128 160 192 225 256 With steering wheel free load required at end of 12.9" pendulum lever to start rotation of wheel = 18 lbs. Hs{Lord Ernest Hives - Chair}/F.J.Hardy. | ||