Two experimental suggestions for locking the Goshawk 11 wheel carrier set screw.
| Identifier | ExFiles\Box 103\5\ scan0033 | |
| Date | 14th March 1923 | |
| X.4085. To BY. {R.W. Bailey - Chief Engineer} from Da. {Bernard Day - Chassis Design} c. to CJ. c. to Wor. {Arthur Wormald - General Works Manager} c. to Hs. {Lord Ernest Hives - Chair} Da {Bernard Day - Chassis Design} 2/M14.3.23. GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 11. WHEEL CARRIER. X.4085. We send herewith N.sch. 1390 shewing two suggestions for providing a lock on the wheel carrier set screw. Fig.1. is a spring friction lock which always resists turning in either direction, but the resistance is only a small percentage of the force required to wind up. We think it may be enough to prevent the unlocking, and in addition to this it has a further advantage in locating the conical disc with reference to the bolt in a way which Sales have asked for before. Fig.2. is a simple Thackeray washer under the nut, the idea of this last being that the cause of the bolt coming undone is that the conical washer is not properly bedded, and when it does seat owing to road vibrations, the bolt becomes loose and and gradually shakes itself out. The Thackeray washer is made especially flexible to maintain tension on the bolt in spite of the cone piece being not properly bedded to a small extent. We are under the impression that the amount of locking required is not very much since we only know of the one set screw which persistently comes off. We have had no trouble with any Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine))s down here. The above two suggestions are therefore entirely experimental. There remains the question of a thief-proof device, and a possible arrangement would be a padlock through the forward end of the set screw, but we should not anticipate that this would be universally required. Still, we think the hole might be always put in. Da. {Bernard Day - Chassis Design} | ||
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).