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Improvements in Sunbeam Trolleybuses
Page 94
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ALTHOUGH there are no entirely new designs of Sunbeam trolleybus this year, Sunbeam Commercial Vehicles, Ltd., Moorfield Works, Wolverhampton, has, during the past few months, incorporated a number of detail improvements in its vehicles. The M.S.2-type six-wheeler is designed for bodies seating from 58 to 70 passengers, and has a pressed-steel chassis frame with deep side members and diagonal
centre members, providing exceptional torsional rigidity.
The control equipment is mounted on the chassis before the body is fitted, making the chassis a self-contained unit, whilst the electrical gear not carried in the driver's cab is attached to the outside of the main frame, so that all parts can be inspected without running the vehicle over a pit. The brakes operate directly on all six wheels and are of the Sunbeam-Lockheed hydraulic type, incorporating the Sunbeam compensating and sealing device.
The B.T.H. 20'2 80 h.p. compoundwound motor is arranged for regenerative and rheostatic braking, and is carried centrally in the chassis in a sub-frame mounted on rubber bushes.
The M.F.1 four-wheeled chassis, for 32-seater low-loading bodywork, has a B.T.H. 65 h.p. motor.