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).
Tests on Bishop steering gear and a comparison with Marles Weller steering.
| Identifier | ExFiles\Box 28\2\ Scan161 | |
| Date | 27th March 1933 | |
| X 4094 E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}12/KT.27.3.33. BISHOP STEERING. We attach a copy of some tests we have done on the Bishop steering gear. We were going to try this on the Bentley, but the overall efficiency of the steering is so low that we shall have to get a lower box ratio in order to get reasonably light steering. Their high reversibility may be due to the fact that they have used a 140 helix angle. Possibly this reversibility is much lower under shock load. We are proposing to get them to fit a lower helix angle to the steering which will give us the right overall ratio, and at the same time right the reversibility. We shall then be able to get a better comparison with the Marles Weller steering. At the moment we think that the latter is a much better steering because it has a far greater area of contact on the thread. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||