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Vulcan.

3rd November 1925
Page 36
Page 36, 3rd November 1925 — Vulcan.
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pERIIAPS the most striking exhibit on this stand is the new safety coach or saloon omnibus 'with comfortable seating accommodation for 20 passengers, a very low loading level and a ground clearance of not less than 10 ins.

The engine is of the six-cylinder type with a bore and stroke of 95 mm. and 140 mm. respectively and of a design embodying the latest features..

The transmission system includes n multiple dry-plate clutch, four-speed chain-driven gearbox, universally jointed propeller shaft and a double-reduction rear axle, the reduction consists first of a bevel drive and then an enclosed pinion and gearwheel, the bevel drive is carried at the centre in a banjo forging, the centre line of the shafts coming from the differential being several inches below the centres of the rear wheels ; in this way a very low load-line is obtained.

The braking system is of exceptional interest, expanding shoes taking effect upon all four wheels and being controlled by the pedal. The Clayton (Dewandre) servo system of operation is employed in which engine suction is utilized to assist the driver. The service brakes act upon drums of 17 ins. and 211 ins, diameter at the front and rear respectively, whilst an independent brake acting on 18-in. drums is controlled by the hand lever.

Long semi-elliptic springs are employed at the front and rear, these being of the special Woodhead self-damping type, needless to say the chassis is mounted upon pneumatic tyres.

The vehicle as a whole has a most attractive appearance and is fitted with two doors on the near side, giving accei3s to a central gangway. The driver's seat is partitioned off from the rest of the interior and, owing to the canting of

'the steering wheel, a very comfortable driving position has been obtained. In the front there is a windscreen of the three-panel type with a pronounced degree of slope.

Another exhibit of exceptional interest is a 20-25-cwt. chassis built to War Office specifications and fitted with a delivery fan type of body. The four-cylinder engine has a bore and stroke of 80 mm. and 130 mm. respectively, and the transmission includes a four-forward-speed gearbox, cone clutch and worm drive. Of somewhat similar specification is the 2-tonner, also of War Office subsidy type, which is shown as a chassis without bodywork.

The last of the four exhibits is a 30-cwt. general-purpose lorry which is specially equipped, the chassis, as in the case of the 2-tonner, has a four-cylinder engine, four-forward-speed gearbox, cone clutch and worm. drive. A feature of this exhibit is the special doubleput-peso lorry body fitted, which has a hinged tailboard and detachable sides, so that it can be used as a flat platform body when desired. The driver's cab is completely 'enclosed by two doors fitted with sliding windows, a canopy above and a windscreen in front.

A feature on the stand which attracts considerable interest is a small working model of the Vulcan three-way tipping wagon, which runs backwards and forwards along rails, at one end of its travel it receives a load of pebbles from a shoot and upon reaching the other end the body tips sideways and the load is discharged.

As the 20-25-cwt. chassis is not so familiar as other Vulcan models, a more detailed description seems called for. The engine has a cubic capacity of 2,614 c.c. and is fitted with a detachable head, a practical feature being the lugs which are provided to facilitate lifting the head when necessary.

The camshaft and magneto are driven by a silent chain in triangular fashion at the forward end of the crankcase, and this chain can be adjusted from outside under running conditions by means of a jockey pulley. Another feature tending to ease the maintenance is the easy adjustment on the waterpump gland. The gearbox is bolted up to the crankcase and the whole unit is supported at three points in the frame.

An open propeller shaft with fabric universal joints is employed, and the back axle, which contains the overhead worm and wheel drive, is of the fully floating type. In this model the brakes take effect upon the rear wheels only, as is the caze also in the 2-tonner and 30-cwt, chassis, only the new sixcylinder low load-line model having fourwheel brakes. We believe that the new chassis will prove very popular.

Vulcan Motor and Engineering Co. (1906), Ltd., Crossens, Southport.

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Organisations: War Office
Locations: Southport

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