A New Trailing-axle 1 0-tonner
Page 51
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The Latest Addition to the K-type Range of Heavyduty Goods Models Produced by Karrier Motors, Ltd.
MI OR many years the K-type machines produced by Karrier 12 Motor's, Ltd., Karrier Works, Huddersfield, have figured prominently amongst heavy-duty goods-carrying vehicles and an addition has now been made to the range by the introduction of a trailing-axle six-wheeler, which is built for 10-ton loads. The new model is known as the KW and whilst retaining those features associated with the earlier K-type products, it embodies certain refinements.
The design follows closely on the lines of the wellestablished K7 chassis, with the exception that the frame has been lengthened and stiffened ; it has eight cross-members and two longitudinal tie-rods. The springs of the trailing axle have been coupled to those of the driven axle in a manner which ensures a correct proportioning of the load to each axle. Servo-operated internal-expanding brakes take effect on all four rear wheels, whilst there is an external-contracting brake, which is foot controlled, on the transmission. The trailing axle is carried on a pair of underslung springs, the front ends of which are coupled through levers on a transverse balance shaft to the rear ends of the springs of the driven axle.
The standard chassis is of the semi-forward-control pattern, but an optional model in the form of a driver-behindengine type is available, whilst if it he called for, a six-cylindered engine of the side-valve type can be incorporated to take the place of the standard four-cylindered unit. The latter, which has a bore of 5 ins, and a stroke of
6 ins., develops 60 b.h.p. at 1,000 r.p.na. The engine auxiliaries are accessibly disposed and it is worthy of note that to obtain good carburation the mixture, upon leaving the Solex carburetter. is conveyed through a hot-waterjacketed pipe to the cylinder block, through which it passes to an induction pipe forming a hot-spot with the exhaust manifold. The magneto-is driven from the camshaft.
A leather-lined cone clutch is used and an adjustable stop is embodied in its design. The gearbox provides fourforward speeds and a reverse, with direct drive on top gear.
The gear ratios are as follow :—top, 8.22 to 1.; third, 14.4
to 1; second, 23.9 to 1; first, 42 to 1; reverse 51.8 to 1. The drive from the gearbox to the front end of the propeller shaft is by a short coupling shaft having an enclosed jaw
type universal joint at each end. The propeller shaft transmits power to the forward rear axle and is enclosed in a combined radius and torque tube, which at the rear is bolted to the flange 'of the axle housing and at its forward end is supported in a large 'spherically seated cross-member. The driven rear axle is of the bevel-and-spur-gear type, the axle shafts being fully floating.
Other features of the chassis include long, semi-elliptic springs, detachable disc road wheels mounted on taper roller bearings and worm and segment steering.
The wheelbase of the machine to centre of the driven axle is 16 ft., the track being 5 ft. 111 ins. The overall length is 28 ft. 4i ins, and the overall width 7 ft. 51 ins. The centres of the rear axles are 4 ft. apart and the vehicle can be turned iA a circle of 73 ft. The weight of the chassis is 4 tons 14 cwt. The dimensions of the pneumatic tyres are 40 ins. by 8 ins, and twins are used on both rear axles.