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Guy . . . 33
Page 16
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(NNE of the largest rigid-frame L./vehicles in the whole of Olympia, the Guy Goliath 11-tanner, is hound to attract a good deal of attention, partly on account of its size, but more particularly because it is really a new model incorporating a six-cylindered engine of the compression-ignition type. As is usual with Guy vehicles, all parts of this interesting chassis are built on robust lines, the model shown retaining the exceedingly strong frame section of 12 ins, depth with 3*-in. flanges. The frame is thoroughly braced throughout its length and provides a body space of 22 ft. 1 in., despite the moderate overall length of the chassis of 28 ft. 71 ins. The frame height laden is 2 ft. 8i ins. and the overall width of the complete vehicle is 7 ft. 6 ins., whilst the turning circle is 65 ft.
Developing rather more than 100 b.h.p. at 1,650 r.p.m., the six-cylindered Gardner engine fits in very well with the requirements of the Goliath chassis. The bore and stroke dimensions are 4* ins. and 6 ins, respectively, so that the R.A.C. rating works out at 43.5 h.p. Utilizing a compression ratio of 13 to 1, the unit develops about 350 lb.-ft. at 1,000 r.p.m.; this torque figure, in conjunction with an axle reduction ratio of 8.25 to 1, gives the vehicle a very creditable top-gear performance. It should be noted that in this latest Gardner engine many improvements over earlier types have been incorporated. In the D26 first place, the unit, with its flywheel, oil and water, scales but 1,480 lb.
The transmission follows very much upon the lines of the 1931-model Goliath, but an adjuster has been embodied in the clutch-pedal mounting, the reach of the pedal being altered by turning a self-locking hand wheel on the screwed link connecting the pedal arm with an arm carried by the operating shaft. Furthermore, the braking system has also been redesigned, a new layout for the operating mechanism including a master Dewandre servo motor housed on the outside of the frame and connected by rods to the pedal and rearwheel drums respectively. Pipe Hues lead from the master valve of this motor to additional cylinders attached to the front-brake assemblies ; thus, the rear shoes are applied mechanically (assisted by the servo action of the master cylinder), whilst the front shoes are applied by the servos on each pivot.
A 51-seater double-deck four-wheeled bus is also shown mounted on the 16-ft. 71vin. wheelbase chassis, the vehicle being powered by the six-cylindered 110 b.h.p. petrol engine.
Of more than ordinary interest is a 3-4-ton 1,000-gallon tanker, mounted on the four-cylinder-engined 14-ft 44-in. wheelbase chassis. The body space of this particufir vehicle is 18 ft. 31 ins., measuring from the dash to the end of the frame, and the overall length works out at 22 ft. 9* ins.
Of somewhat similar specification in so far as the transmission is concerned is a 50-cwt. chassis, but this model has a 12-ft. 3-in, wheelbase and is powered by a four-cylindered overhead-valve engine, developing 44 b.h.p.
Only one example of the well-known 56-60-seater trolley-bus is shown, the particular model exhibited having a 16-ft z*in, wheelbase and a generous tyre equipment. The motor is a 75 b.h.p. compound-wound regenerative type, with a patent drum-type controller and shunt regulator. It is equipped with a double-deck " low-height " body by Chas. H. Roe (1923), Ltd.—Guy Motors, Ltd., Fallings Park, Wolverhampton.