The Range of
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Halley Chassis for 1930
A NUMBER of additions and 1-1. modifications has been made in the range of chassis produced for 1930 by Halley Motors, Ltd., Yoker, Glasgow. The 2-ton W20 model has aluminium internalexpanding brakes instead of the spring-steel expanding bands previously employed. The brake drums are also mounted on the outsides of the hubs so that they can be removed without ,interfering with the hubs or bearings. This feature applies also to passenger models.
. The 21-3-ton DF2 model can also be supplied with a pointed radiator of the familiar Raney pattern.
The 4-ton model P six-cylinder chassis is being replaced by the P911 type, although the model P can still be supplied to special order. The 4-ton model EF2 with forward eontrol has been further developed to give a capacity of 5 tons; it can also be had in the bonneted form.
The 5-ton and 6-ton U and GU models have been dropped.
Last but not least in the goods range is. the 8-ton BS3 rigid-frame six-wheeler whieh has given highly successful results in service and will, Consequently, remain.
In the passenger classes, the Talisman 20-seater will be supplied with a Kirkstall overhead-worm rear axle. A considerable number of changes has been made in the Conqueror. This has a chromiumplated radiator shell of almost rectangular shape which is continued below the starting handle and conceals the front cross-member. The frame is no longer inswept at the front but is straight in plan and somewhat narrower to permit the use of low-pressure pneumatic tyres. The transmission brake is dispensed with and a twopiece propeller shaft with Spicer joints and a centre bearing, and a plunger joint at each end is employed. The centre bearing takes the form of two -ball races carried in a -bracket suspended from a large tubular cross-member. The two 'sets of shoes operate in the rearwheel drums.
A gearbox of an entirely new design is being utilized. This has pinions Iin. wider than those in the old box and an improved form of interlocking gear by V plungers instead of spring-held balls. This alteration obviates any risk of the non-engagement which has sometimes occurred through even a slight amount of lost motion in the operating gear. The gears themselves are of oil-hardened nickel-chrome steel. The same patent operating gear is employed, but in the new box it is mounted at the side instead of at the top, thus easing the work of the coachbuilder. Certain of these alterations have been made with a view to meeting the requirements of Scotland Yard. Each brake drum is held lightly by four gun-metal screws. This is to prevent the drum being pulled off accidentally when removing a wheel. Two tapped holes are also provided in each drum for the insertion of bolts by which it can be forced off. The servicebrake shoes have a width of 31 ins., and those for the hand brake 2 ins., whilst the 'drums are 18 ins, in diameter. The service brake is operated by a Dewandre servo.
The Chieftain closely resembles the Conqueror and embodies the same modifications, but it is equipped with a six-cylindered Dorman engine of the 6JUL, Mark lll pattern, instead of the 6JUL Mark II, with which it was formerly powered. The new engine gives a considerably increased output, the peak of the curve having been raised. There is also in this chassis a modification of the subframe to suit the different engine. It may be mentioned at this point also that the same type of engine is to be employed in the six-wheeler.