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Higher Speed and Longer Range in New Electric
Page 130
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DUE to make its first appearance at the Dairy Show next month is a new Morrison Electricar dairy vehicle. Known as the E.H.20, it is derived from the previous E.H.25 model, but offers a higher speed-13-14 m.p.h.—and an increased mileage per battery charge.
The traction motor is a series-wound type fully enclosed and ventilated. A Hardy-Spicer propeller shaft takes the drive to a doable-reduction rear axle r16 incorporating helical-spur and spiral-bevel gearing. An innovation is the control gear for the motor.
Drive is now governed by a singledepression pedal which operates an automatic delay switch giving three speeds forward and reverse. The delay mechanism is designed to avoid an excessive drain on the batteries when starting from rest.
The hand switch which engages reverse has an interlock to ensure that the neutral isolating position is selected before engagement. This control system is also fitted to all full-range M.E. vehicles.
The frame is of pressed-steel channel sections. Three-piece wheels carry 23 x 5-in. tyres and suspension is by semi-elliptic springs: Lockheed hydraulic brakes with two-leading-shoe action on the front wheels and leading-and-trailing shoes at the rear have 11-in.-diameter drums and 4-in.-wide facings.
A new walk-through cab gives better protection for the driver and improved forward vision. The standard fully open cab may be supplied if required.
Suitable for a deck length of up to 7 ft. 6i in., the E.H.20 will carry a 1-ton load non-stop for 34 miles when the standard Crompton 24 SATH 13 battery of 240-a.h. capacity is fitted. A 24 THA 13 unit of 258-a.h, capacity, which increases the non-stop range to 38 miles, can be supplied.