New Guy Range of Heavies
Page 59
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Maximum-load Four-, Sixand Eightwheelers, Characterized by Straightforward, Robust Design, Mark this Maker's Re-entry into the Heavy vehicle Market
BUILT for maximum legal gross Loads in this country, and for higher loads where regulations permit, the new Goliath range of forward-control four-, sixand eightwheeled goods vehicles produced by Guy Motors, Ltd., Wolverhampton, will be available with a variety of wheelbases and gear ratios. The range is based on conventional practice, with robust construction and ease of maintenance as outstanding features.
The type name, "Goliath," was used by Guy Motors, Ltd., before the war and, having lapsed for a period, is now revived. _ The six-wheelers can be supplied with twin front or twin rear axles and the specifications of both the sixand eightwheelers include singleor two-axle drive.
All the models have been designed for towing trailers and the fourand sixwheeled models will be produced in tractor form for use with semi-trailers. With the exception of the six-wheeled chassis with twin front axles, the range will also be quite suitable for tipper operation.
Payloads of 7-22 Tons
When equipped with a standard body the four-wheeled solo machine has a domestic payload rating of 7 tons, a payload of 15 tons in semi-trailer form and 171 tons when operating with a four-wheeled trailer. The eightwheeler has a payload of 15 tons as a solo machine and 22 tons with a fourwheeled trailer. Where higher maximum loading is legal and operating conditions are normal, weights may be increased by 2 tons on the solo four-wheeler and an the six-wheeler with twin rear axles, and by 3 tons on the eight-wheeler.
The four-wheeler is fitted with a :iardner 6LW power unit deceloPing 112 b.h.p. at 1,700 r.p.m. and a torque A 358 lb.-ft. at 1,300 r.p.m., or a 5LW sail of 94 b.h.p. and 300 lb.-ft. torque. the Gardner suspension system is miployed for all the installations.
The drive is transmitted through a 16-in, single dry-plate clutch to a five speed direct-drive-top gearbox which is in unit with the engine, and by a divided propeller shaft with Hardy Spicer wideangle universal joints to the final drive. The gearbox ratios are 7.92, 4.68, 2.74, 1.565 and Ito 1.
A spiral-bevel gear and doublehelical reduction is employed for the single-axle drives and for tandem axles without a third differential, the form of bogie suspension used being related to the drive layout. A balance-beam fourspring suspension or an articulated twospring system is available, the former with singleor two-axle drive and the latter having tandem drive without the alternative.
The two-axle drive of the balance team suspension has overhead worms and an inter-axle differential, and worm drive is also used in the articulated bogie when a third differential is incorporated.
Semi-elliptic leaf springs fitted with bumper pads are used in both the front and rear suspension systems, the trunnion-mounted rear springs of the articulated bogie being inverted and attached to the axles through swivel forks. The ratio of the bevel drive and reduction gearing employed for the two-spring suspension is 7.9 to 1, which is lower than the standard ratios of the other systems in conformity with the suitability of vehicles with positively connected axles for off-the-road operating conditions.
Where single drive is used, the axle ratios are 6.25, 7 and 7.9 to 1. For double-axle drive vehicles the ratios are 6.4, 7.75, 7.9 and 10.33 to 1. The frame members of the fourwheeler • are f-in, in section and have a maximum depth and flange width of 9i in. and 3 in, respectively, whilst the sixand eight-wheelers have members of material with a maximum depth of 12 in. and 3--in. flanges. Fitted bolts are used throughout.
Features which are similar to both types include straight-top flanges and pressed frame cross-members with detachable front and rear engine bearers. Double cam-and-roller steering is used.
Air-operated Brakes
The sixand eight-wheelers are equipped with air-operated brakes with individual wheel cylinders at the front, as well as at the rear, where balancebeam suspension is employed. The rear brakes of the articulated bogie are operated by two cylinders attached to the chassis with rod-and-quadrant type adjustment, A 40-gallon fuel tank is fitted to all models with the exception of the shortwheelbase four-wheeler and eightwheeler, which are equipped with 36gallon tanks.
The cabs have a main structure and doors of pressed steel, the latter being fitted with controlled drop windows. A twin-panel windscreen, shaped quarter lights and a large rear window provide good driving vision.
The Goliath range is equipped for maximum speeds of 26-32 m.p.h., according to the ratio of the axles. When loaded to 12 tons the fourwheeler can climb a 1 in 2.9 gradient
• and the eight-wheeler hauling a trailer of 29i tons gross combination weight is equipped to deal with a 1-in-6.4 incline.