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).
Graph and explanation concerning the effort required to steer a car and the types of steering gear.
| Identifier | ExFiles\Box 178\1\ img103 | |
| Date | 13th July 1926 guessed | |
| - 4 - GRAPH I EFFORT REQUIRED TO STEER CAR. Y-AXIS: LBS/INS TORQUE AT PIVOT PIN TO MOVE WHEELS X-AXIS: TYRE PRESSURES LBS/D" DATA SERIES 1: HISPANO V 40/50 DATA SERIES 2: 40/50 FRONT AXLE WEIGHTS 2695 LBS. DATA SERIES 3: HISPANO FRONT AXLE WEIGHTS 2280 LBS. (c) Reversible and non-reversible steerings. There are three main types of steering gear - Reversible - Semi-reversible - Non-reversible. It should be observed that though the gear employed may be semi-reversible, yet other factors in the system may make the steering as a whole totally irreversible in some ways. Thus friction in the pivots or a plain thrust washer at the base of the column will prevent a R-R steering from self-centering, because the force tending to make the steering return, is entirely absorbed by friction before it reaches the semi-reversible screw and nut. Again, there is a common impression that a worm and wheel steering is irreversible. As is demonstrated later, the irreversibility or contd. | ||