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).
Ideas for a two-speed epicyclic gearbox, comparing it to a competitor's (Wilson) design.
| Identifier | ExFiles\Box 178\3\ img045 | |
| Date | 23th January 1932 | |
| -2- R.1/MJ.23.1.32. Cont'd.{John DeLooze - Company Secretary} We also had for some years the idea of a two speed box of ordinary type about 2nd. and top only with unit (epicyclic) as 27-EX, but I am trying to get the complete train as it would be simpler to control. Wilson has 4 units against my 3 and he has reverse brake with 4 times engine torque. I use 1st. and 3rd. speeds brakes and thus save one brake and have on each 2 times engine torque. I have simpler and more practical balanced brake. I hope to send drawings and written description for this to Claremont Haynes & Co. this week end, but it is much work, and one feels that probably the friction devices as Wilson and 27-EX. may prove too unreliable and the synchro mesh in the form we already have it or with epicyclic units trains and synchronising brakes may prove sufficiently handy and more reliable because positive. R.{Sir Henry Royce} | ||