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).
Page 4 of a gearbox analysis, listing disadvantages and a summary comparison.
| Identifier | ExFiles\Box 173\3\ img008 | |
| Date | 10th March 1934 | |
| HS.{Lord Ernest Hives - Chair} -page 4.- March 10, 1934 4. Utilises 90% normal gearbox parts. 5. Prevents the engine being over-revved on the lower gears. Disadvantages: 1. Free-wheeling in the lower gears. 2. Appreciable increase in bulk and weight of gearbox, probably 10% more than our present standard synchro-mesh but little more than an all synchro-mesh. SUMMARY Actually from a customer's point of view this has nothing on the Wilson box and fluid flywheel. I think it lies between our synchro-mesh and the epicyclic gear. We have given our transmission such a lot of attention lately that I hardly think we are justified in playing with this job. Am trying to arrange, however, for us to try a car with the box on as there are two in Paris, and also for diagrammatic sketches of the operation to be sent on to us. NOTE: Noticed one very ingenious novelty on this box. A screw thread cut on the shaft is used as an oil pump to force oil into the shaft centre. The claim they can pump up to 50 lbs./sq.in. by this method. Rm.{William Robotham - Chief Engineer} | ||