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 heavy left-hand steering, including a table of load measurements and a graph illustrating leverage differences.
| Identifier | ExFiles\Box 178\1\ img113 | |
| Date | 13th July 1926 guessed | |
| - 14 - high speed steering wobbles in some cars. In these cases this is the limiting factor in the amount of 'gather' which can be employed. (h) Heavy left-hand steering. It is not generally realised that in the majority of cars, considerably more effort is required at the steering wheel to negotiate a left-hand corner than a right-hand corner. This is directly attributable to the angle at which the steering levers have to be set to obtain 'Ackerman' steering. Measurements taken on three cars gave the following results. Load in side steering tube for full lock - lbs. Old type 40/50. R.H. turn. 225 L.H. turn. 330 EAC. 'V' series. R.H. turn. 235 L.H. turn. 350 Hispano. R.H. turn. 225 L.H. turn. 346 GRAPH III RATIO ROTATION OF STEERING WHEEL / ROTATION OF STUB AXLE. MEAN OF BOTH STUD AXLE MOVEMENT TAKEN. GRAPH ILLUSTRATING GREATER LEVERAGE ON R.H. LOCK THAN L.H. LOCK. DEGREES STEERING WHEEL ROTATION L.H LOCK R.H. LOCK. contd. | ||