A Novel Twowheeler
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for industrial work
AITER many years of 'experimental work Mr. E. V. Hammond, of 88, Louisville Road, London, 8.W.17, has decided to market his 3 h.p. Hamotor. He is desirous of getting into touch with a concern having facilities fox its production. The machine is intended as a two-wheeler for local transport, for carrying one person, for towing a trailer, and—in conjunction with a four-speed shafting attachment—for driving chaff cutters or other fixed machinery. It is hoped that the cost will be in the neighbourhood of MO.
A finned aluminium casting forms the steering head and radiator, the two main tubes of the frame serving as the water pipes to and from the water jacket of the single-cylinder 297 c.c. four-strokecycle engine, which is mounted vertically below the saddle. The two valves are horizontally placed, the camshaft being carried in a casing behind the cylinder. The drive from the crankshaft to the camshaft is by chain with a jockey-sprocket tensioner. Mixture is provided by a large surface-type carburetter on the near side ; the designer's contention is that this device is more foolproof than a spray-type carburetter.
A fiat belt provides the single-speed transmission system. A controllable jockey pulley allows the belt slip to be regulated, thus giving a clutch effect; slip also serves to lower the gear when required. From the countershaft power is taken by roller chain to the 16-in. rear wheel.
Each of the two cast aluminium wheels is supported on only one side, the axle being carried in Hoffmann journal ball bearings. The front wheel is sprung, but not the rear one. On the
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dash plate is the oil tank ; the tyre pump is applied to a valve and the oil put under pressure. When the rider turns on the tap oil is fed to the crankcase, or a drip control may be employed.
The metal-pan seat for the rider is spring mounted, and a Moseley Float.
on air cushion is provided. The machine weighs 296 lb. complete with petrol, oil and water. Its road speed is 10-12 m.p.h.
It has been the inventor's aim throughout to provide the utmost simplicity and to avoid, so far as possible, the use of any part which requires mechanical skill to handle it.