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).
With diagrams discussing the design and mechanics of a reverse pinion and gear ratios for a gearbox.
| Identifier | ExFiles\Box 104\4\ scan0138 | |
| Date | 5th May 1932 | |
| X 5310 DA{Bernard Day - Chassis Design}/HDY.{William Hardy} E.{Mr Elliott - Chief Engineer} } FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} } (At Le CanadelHenry Royce's French residence.) R3/M2.5.32. Sent from WW. 5.5.32. C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} GEARBOXES - ALL SIZES - X. 7310 ALSO PEREGRINE & BENSPORT. X. 5310 X. 4553 X. 4027. REVERSE PINION. It was not anticipated that anyone would feel the reverse pinion in getting into 1st. gear, but you will see my telegram. Our enemies can have something to say, which can be avoided by a little trouble. The two great wheels are 3 widths and clearances apart - [Diagram Labels] Second. Second, 1st and 2nd. To engage 2nd. Reverse. Double width movement on reverse pinion. The double movement of the reverse pinion should be obtained by some simple levers in the box, and not by extra movement of the change speed lever, which I think would be awkward and troublesome, and may involve us in lots of difficulties in the car and in the tower. The lever and tower should be very simple, and of crude and robust pieces - see other boxes. I do not think we want an interlock of sliders, and a gate, but do not remember exactly. The taper pins, rivets, etc. must be much larger india., and shorter to make them practical. Those shown are too small, especially in the synchro mesh cones. Press on and pin, either parallel or taper, is cheapest, and practically good. (See RHC.{R. H. Coverley - Production Engineer} [illegible word crossed out] who is a good authority on this sort of work.) Gear ratios will do like on a sports car, or a compromise. It is an academic argument to need two ratios. Make the best average, and if we must have two, let it be proved by trial. I like gears near together as on a sports car, or nearly so. R.{Sir Henry Royce} | ||