THE LATEST TWO-TONNER
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from the
United States
A Four-cylindered Engine and a Very Robust Frame are Features of a New Stewart Machine
TN the United States of America ..1Stewart chassis have a reputation for soundness of construction coupled with reasonable first cost. Judging by an inspection of one of the latest models --the type 40, intended for two-ton loads—these qualities are demonstrated to the full in the new product, to which we referred briefly in our issue of August 5th.
The chassis is robustly constructed throughout and is priced at £295 (wheelbase 10 ft. 10 ins.). For a wheelbase of 12 ft. 1 in. £20 extra is charged, and £40 extra for a wheelbase of 13 ft. 4 ins. In any chassis the inclusion of a six-cylindered engine developing 60 b.h.p. is £25 extra. These prices are quoted by the sole concessionaire for Great Britain and Ireland, Morgan Hastings, Ltd., 42, Sussex Place, South Kensington, London, S.W.7.
C26 We refer here specifically to the 12-ft. 4-in, wheelbase model, but our remarks, of course (with the exception of certain specific figures), apply equally to the shorter types.
The chassis weight of the largest of the trio is slightly over 30 cwt., whilst the body allowance of 11 cwt. 2 qrs. 12 lb., and the permissible pay load two tons.
A Lycoming four-cylindered engine is used. This has a bore of 3+ ins, and a stroke of 4+ ins. ; the maximum output is 50 b.h.p. The crankcase and cylinder block are an integral casting, but the cylinder head is detachable. The crankshaft runs in three bronze-backed bearings, whilst the white metal for the big-ends is cast directly into the rods.
Lubrication is on the fully forced system, and the cooling layout includes a water pump and thermostat. Both the ignition system, which is a coil-and-battery type, and the dynamoand-starter installation are of DelcoRemy manufacture.
The engine-gearbox mounting is of the four-point type ; the arms of the clutch pit rest upon rubber pads laid on brackets projecting inwards from the frame and a foot at the front end of the power unit rests upon a bracket anchored to the forward cross-member. Two securing bolts are used in this instance, thus making four points in all.
An 11-in, single-plate dry clutch with a shock damper conveys the drive to the four-speed gearbox, the ratios of which are : 6.4, 3.09, 1.69 to 1, and, of course, direct drive on top gear.
A divided propeller shaft having three Hardy-Spicer joints drives the spiral-bevel rear axle, in which the pinion is carried at two points. In the case of the 10-ft. 10-in. chassis a onepiece propeller shaft is used. The half shafts are fully floating and carried 011 Timken roller bearings. As standard the gear ratio is 5.6 to 1, whilst a ratio of 6.37 to 1 may be specified.
Pressed-steel frame members 7+ ins. deep are constructed in 7-32-in. material. They are tied laterally by gusseted pressed-steel cross-members, whilst the front and rear anchorage points of the rear springs are tied by circular-section cross-members.
Semi-elliptic springs are used for both the front and rear axles. In the case of the front springs they are 3 ft. 2+ ins, long by 2+ ins. wide. Bronze bearings house *-in. shackle pins, whilst
in the case of the rear springs the main leaves are 4 ft. 2 ins. long, 2.i ins, wide and have 1-in.
shacklepins. Above the 11-leaf rear springs are six-leaf auxiliary springs, which, under conditions of heavy load, come into contact with horizontal plates on the chassis frame, thus stiffening the the suspension when it is most needed.
Bendix. Duo-Servo four-wheel brakes are operated by pedal. The drums of the front wheels are 14 iris. by 2 ins., whilst those in the rear wheels are 2 ins, larger in diameter. The parking brake is hand operated and is of the external-contracting type operating upon a drum mounted immediately behind the gearbox.
The wheels are steel-spoked and equipped with demountable rims ; they carry 32-iu. by 6-in. tyres, those on the rear wheels being dual. '
The front track is 4 ft. 11 ins., whilst the rear-wheel track is 5 ft. ft ins. On the short chassis a body of 8 ft 6 ins, can be accommodated, and on the largest of the three types a 12-ft. 6-in. body can be mounted, the overhang still being moderate.
Standard equipment includes an electric starter, dynamo lighting set and horn, tool kit, jack, Spine rim and carrier, speedometer, air cleaner, vacuum tank, spotlight, and high-pressure grease lubrication system; • An inspection of the Stewart model 40 shows that it is stoutly constructed, has a wide track in relation to its load capacity and is of clean design throughout.