Design improvements for shafts, clutch, and pedal mechanisms, referencing the Goshawk models.
| Identifier | ExFiles\Box 77\2\ scan0093 | |
| Date | 15th February 1921 | |
| Contd. -2- There is no need for spherically split bearings for this shaft, which would be absolute extravagence, and a waste of effort. We think also that the pendulum levers half way up the clutch could be clamped on with a smaller bolt than 3/8", and would do with a wound wire key, or preferably a Woodruff, instead of the expensive square key and slot drilled groove. For the small force that has to pass through this tackle one would expect that pins would do of small dimensions. When you see how we have arranged this work on "Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) II", you can probably use our arrangement on "Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) I". For instance, we are using the floorboard, and a portion of the pedal for the usual stop. We should not expect that the stops as near the centre as those shown on your scheme will be at all satisfactory, because it wants a fairly powerful spring to pull this pedal up, and the brake off, and the long pedal would cause a very heavy pressure on the stop. Amongst other things, we are putting short bosses on the pedal levers, and brazing short pieces of tube in by the pot brazing system. We do not think for a moment it would be wise to endeavour to get special oval tubes for the pedals on "Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) I" but follow "Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) II". We are expecting to send you the hand brake lever of "Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) II" to-morrow afternoon. This finishes the central lever control work. The brake quadrant is below the floor, | ||
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).