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G.E.C.
Page 173
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Trolleybus of Advanced Design ; Lowlevel Floor and Twin-motor Separate Drive. Also a Single-motored Chassis
Stand 118
REPLACEMENT of trams by trolley. buses is a marked modern development, and on that all road users will agree is much to be encouraged. For this reason alone, especial interest will be aroused by the trolleybus exhibits
at Olympia. One of the most outstanding of these is to be seen on the stand of the General Electric Co., Ltd.
IWO Leyland-G.E.C. machines are on view—one 'a complete three-axle vehicle, and the other a two-axle chassis. The first of these is described as the Low-Floor model, and it incorporates a number of advanced features. Of outstanding interest is the fact that the rear bogie wheels on each side are driven independently by a separate motor mounted outside the frame. Each motor transmits torque by a propeller, shaft to worm gears mounted on the ends of the rear axles and coupled by short shafts with the road wheels. Each is rated at 40 h.p. and is arranged for 'series-parallel control.
The G.E.C. concern, the maker of the motors, is, of course, also responsible for the circuit breakers, drumt3436 master controller, contactors, etc. Incorporating side members of 11i-in. tapering channel section, the frame is underslung at the rear and extended forward over the front axle. Retardation is effected by Leyland ratchet-type hand brakes and a foot system operated by air, a compressor, driven by a G.E.C. motor, maintaining the supply. There are, in all, 12 brake shoes, each 6 ins. wide.
Low-pressure tyre equipment is used, the front wheels being shod with by 20-in, pneumatics, and the rear wheels with 91-in. by 20-in. tyres. Complete with electrical equipment, this chassis weighs 5tons 5i. cwt., the wheelbase being 15 ft. and the turning circle 52 ft.
An . outstanding feature of the machine is that the step height is 11 ins.; this represents the floor level, no further step having to be ascended to enter the saloon. Furthermore, there is a door at each end, and the design constitutes a big advance towards solving the quick-loading and unloading problem.
The saloon body, which is of the Hybridge type, affords accommodation for 63 passengers. It is a product of Messrs. Massey. Bros., Wickham. There are two staircases. Doorvac
airoperated door gear is fitted.
G.E.C. equipment is, of course, used on the other exhibit—the two-axle trolleybus chassis. In this case, the power is provided by a single 80 h.p. motor, which is mounted amidships and arranged for series control with field regulation.
This machine has a wheelbase of 16 ft. Oi• in. and a turning circle of 52 ft. The suspension system •incorporates hydraulic shock' absorbers.— General Electric Co., Ltd., Magnet House, Kingsway, London, W.C.2.