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).
Self-centering steering mechanisms and design considerations for a 20 HP model.
| Identifier | ExFiles\Box 29\1\ Scan289 | |
| Date | 27th April 1927 guessed | |
| contd :- -2- (4) Finally we come to the self centreing so necessary for slow steering, and quick and safe handling. Here we have schemed the independent spring return, which we want to try with the greater irreversibility. I do not think this is required to be set-up as the smaller angles must be done by hand without opposition from spring, so that comparing the effect with that felt when using a very reversible worm, we definitely do not want set-up, and a simple(clock type) spring around the worm shaft (hand wheel shaft) in a spiral or helical form is all that is wanted, say three strengths, about the same as generated by the axle pivot inclination which can be calculated. The effect should be more manifest because it will not have to pass through the irreversibility of the nut. I would like to point out to Mr. Day that he is asking for too great a variety of parts, resulting in being unnecessarily expensive, and the result is we may not get anywhere. I suggest we reduce the requisition to the most hopeful and simplest things that promise to shew us which way to go. I believe the above covers all the ground as we know it. The New PhantomCodename for PHANTOM I axle has done much good, and we want a 20 HP. of the same physical proportions - i.e. out of centre steering etc. This will shew Mr. Day and Mr. Bailey what to do with recent drawings on the above. R.{Sir Henry Royce} | ||