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).
Proposal for a combined direct electric and mechanically geared transmission system.
| Identifier | ExFiles\Box 6\2\ 02-page119 | |
| Date | 14th October 1930 | |
| Y523. DA.{Bernard Day - Chassis Design} HS.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} FROM R.{Sir Henry Royce} R2/114.10.30. (DESPATCHED 30.10.30.) CHANGE GEAR - COMBINED DIRECT ELECTRIC, & MECHANICALLY GEARED. C. to SO. C. to WOR.{Arthur Wormald - General Works Manager} C. to PN.{Mr Northey} C. to Mr. CLAREMONT. Since the engine revs. have increased by about 100% in 20 yrs. it seems much more possible now to have electrical combination in the transmission, and I give a scheme which might be better than the Daimler/Wilson fluid/gear arrangement. It consists of:- CLUTCH. (Dynamo field instead of flywheel. Armature --------- clutch driven part. ELECTRO MOTOR. (Motor for supplying extra torque for 3rd. and 2nd. speed. GEAR. (The 1st. speed and reverse to be by gears (epicyclic or spur type.) This is not the usual electrical transmission, which is very much heavier, but an electro magnetic clutch giving once engine torque direct to transmission, which is increased to 1.4 and 2 engine torques by electro motor fed by current from the slipping clutch, which is further increased to 3 and 4 engine torques to emergency gear and reverse by gearing. If good this would have some definite advantages over the fluid flywheel, which only gives engine torque to transmission. Will Mr. Day make estimates and sketch for an inexpensive provisional protection, if found novel. R.{Sir Henry Royce} | ||