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).
Proposals for improving the gas tightness of the 20 HP gear quadrant.
| Identifier | ExFiles\Box 6\4\ 04-page188 | |
| Date | 18th June 1928 | |
| DA.{Bernard Day - Chassis Design} c. Hs.{Lord Ernest Hives - Chair} X5310 BY1Q/G.18.6.28. 20 HP. GEAR QUADRANT. GAS TIGHTNESS. Referring to DA{Bernard Day - Chassis Design}3/10.6.28. Stent did put forward a number of very ill-considered proposals, none of which had been carried sufficiently far to be worth applying. All that we had were a few sketches which were very indefinite and did not look as if they were likely to be very much value in overcoming the trouble. We agree that in your scheme you have gone very much further, and there are better prospects of making the matter a success, but even in your latest scheme it does not seem to me that the sheet metal piece secured to the top member of the frame, and upon which through the intervention of a felt strip the flange on the end gearbox arm rests, is likely to be satisfactory. It is essential to allow movement equivalent to the clearance between the boss of the gear lever and the top of the frame. It appears to me that the present scheme fails because :- a/- It does not allow a sufficiently long length of steel to permit this movement. b/- Felt as a medium for filling a varying space has never proved to be satisfactory. I would suggest that if the flange carried on the cross tube were projected down a little further and the sheet steel piece were turned up at right angles with a felt pad in between the two vertical faces there would be much more possibility of the job succeeding. If this latter proposal is not concurred in it would be possible to have a thin sheet of rubber replacing the thin steel piece secured both to the end of thegearbox arm with screws as well as to the frame. Incidentally a flap could be turned up at the side to screw to the wood block it is suggested to interpose beneath the floor-board and the frame. BY.{R.W. Bailey - Chief Engineer} | ||