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).
Experimental locking mechanisms for the Goshawk 11 wheel carrier, including a thief-proof option.
| Identifier | WestWitteringFiles\J\March1923\ Scan51 | |
| Date | 14th March 1923 | |
| TO EY. FROM DA.{Bernard Day - Chassis Design} c. to GJ. c. to WOR.{Arthur Wormald - General Works Manager} c. to HS.{Lord Ernest Hives - Chair} ORIGINAL GOSHAWK 11. WHEEL CARRIER. X4085 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 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 Goshawks 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} | ||