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).
Technical note comparing steering gear specifications for 25 HP, Bentley, and Phantom II models.
| Identifier | ExFiles\Box 106\3\ scan0290 | |
| Date | 23th February 1935 | |
| x573D 25 HP. Steering Gears. 1. The Bentley steering box is identical in all respects to 25 HP. 2. Helix angle standard 25 Hp. and Bentley 8.45°. 3. Helix angle standard Phantom II = 7.25° 4. Standard 25 HP. turns of steering wheel from lock to lock - 2.15 (assuming solid s.s. tube). If angle of worm were altered to Ph.II, 7.25°, turns of wheels would be 2.52. This is approx. the same as on 21-G-IV before the cam was changed the last time, and is 17.5% lower than standard. Shorter pendulum lever - 2.75 turns. Present 21-G-IV - 3 turns. Hs{Lord Ernest Hives - Chair}/F.J.Hardy. | ||