See also:riding, has steadily diminished in relative importance since the advent of the safety bicycle (see
See also:CYCLING) . In its
See also:form it is a chain-driven
See also:driver . The
See also:axle is provided with a
See also:gear, which allows of both wheels being driven whether the tricycle is moving in a straight or in a curved path . There are four rows of balls, two near the
See also:middle resisting the pull of the driving chain and two near the road wheels supporting the vertical load . Two types of driving axle are in use . In one the axle is supported from a parallel
See also:tube by four
See also:short brackets . In the other type, the
See also:Abingdon axle, the frame tube is concentric with the axle, and the middle portion is enlarged to form a casing for the chain-
See also:wheel, with two apertures for the chain to pass through . The other
See also:mechanical details are nearly all similar to those on a bicycle . Carrier tricycles, for tradesmen's delivery purposes, are made in two types, one with an extended wheel
See also:base and the carrier behind the rider, the other with a single rear driving wheel, the two steering wheels and the carrier being mounted in front on a transverse tube or frame which is jointed to the rear frame at the steering
See also:head . The second arrangement gives the simplest possible form of tricycle, but it is unsuited for touring purposes . Tricars.—The tricar or motor tricycle was first made by removing the front wheel of a motor bicycle and replacing it by a frame carrying two side steering wheels and a seat .
With a powerfulengine this arrangement gives a
See also:light vehicle from which
See also:good performances are obtained on roads with easy gradients . On steeper gradients the power must be increased, and the
See also:belt drive with only one
See also:speed is inadequate . The modern tricar is on different lines, resembling a small motor
See also:car on three wheels . The engine is 6 to 10 h.p., preferably with two cylinders, air or
See also:water cooled, with clutch and gear-box giving two or three speeds, sometimes also a " c
See also:reverse " speed . The transmission is usually by a chain from the engine
See also:shaft to the gear-box, thence by another chain to the rear road wheel . The frame or chassis is supported on the three road wheels by springs . The steering gear is on the same general lines as that of a motor car . The
See also:weight of a tricar of 7 to 10 h.p. is between 700 and Iwo lb . It is a much faster vehicle, especially uphill, than a small car of equal price . The rear
See also:tire, however, is subject to severer working conditions than the two driving wheel tires of a small car, and must be of adequate strength, or trouble will be frequent . The tricar cannot be said to have attained to the same degree of trustworthiness and freedom from breakdown as the motor bicycle or motor car . The rear tire is difficult to remove, in case of puncture .
The chain drive,
See also:direct from a small chain-wheel on the engine shaft, is faulty in principle . The engine shaft
See also:running often at 2000 revolutions per minute, the chain is necessarily noisy, and is subject to continual gradual stretching, necessitating frequent readjustment . In all respects, except speed, the tricar is inferior to the small car . (A .
SPYRIDION TRICOUPIS (1788—1893)
TRIDENT (Lat. tridens, lri-, tres, three and dens, ...
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