Halley.
Page 53
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Motor Coach.
Tip Wagon. 3A-Ton Chassis. STAND No. 29.
THE Halley Co. continue to confine their attention to one type of citesonly. Their standard model was in
traduced early in the year, and extended road service has not revealed any points needing redesign. The chassis shown is, therefore, identical with that which made its debut at the Glasgow show last January. It well repays the closest examination, and may be said to set a new standard of refinement, in commercial vehicle design. A hill description of the chassis has already been given in The Commercial Motor• of September 2Elth, and further details were given in our forecast last week.
The six-cylinder engine has detach. able heads, and a novelty in this type of engine is the use of aluminium alloy pistons of the slipper type. Connecting rods and crankshaft are also machined all over and very accurately balanced, to secure the utmost smoothness and flexibility. The engine develops its power at 1,200 /less., and, sifter 1,250 revs., the power falls off rapidly. The valve areas being purposely restricted so as to obviate the necessity f any governing device. The frame consists of two straight channels joined by four caststeel cross members and two tubular members, the gearbox being slung from the latter at. three points. • No rivets are used in the frame, bolts being employed instead. The gearbox gives four forward speedes and the final drive is by worm, the worm and differential being carried from the cover of the axle casing. 'Universal joints of the Hardy fabric type are not only used on the clutch shaft 'but also on the eardan shaft, where whip is eliminated by the use of a ball centring device embodied in the joint, The foot brake, it will be noted, is carried on the tail of the worm spindle. The gearbox filler outside the frame should be noted
and also the accessible brake connections. One of the handsomest vehicles of its kind in the Show is the 29-seated charAsbanes on one of these chassis, The other complete example of Halley workmanship is a chassis with a hydrae lically operated end tipping body. There is a. windscreen and cab for the driver's protection, and the finish is in green. An example of the application of linen matic tyres to heavy chassis is provided here, the chassis shown having 37 in. by 7 in. single pneumatics on the front wheels and 44 in. by 10 in. singles on the rear wheels