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The 30 cwt.
chassis specification:
Engine
4-cylinder monobloc, 90 x 130 (3308 c.c.), 24 hp. at 1,000 r.p.m.
Road speed at 1,000 r.p.m. 15.1 m.p.h. Detachable head,
removable in less than seven minutes. Combustion chambers were
designed to promote gas turbulence and were completely machined
to definite dimensions to ensure uniform compression in each
cylinder and an unusually high compression ratio, giving
exceptionally high output with low fuel consumption. The
crankcase was exceptionally stiff and rigid, carrying the
crankshaft of 2⅜" diameter,
and camshaft. The flywheel housing was cast integral with the
crankcase.
The forced feed lubrication system was
unusually complete, applying not only to crankshaft, connecting
rods and camshaft bearings, but also to the overhead valve gear.
Cooling was by water pump circulation.
Clutch
Single dry plate, with a stop provided on the primary shaft.
Gearbox
Four forward speeds and reverse with right hand change. The
shafts were exceptionally short and of unusually generous
diameter, providing that rigidity which ensured quietness. The
gears were highest quality oil tempered nickel chrome steel with
wide faces. Spiral gears located at the rear provided a positive
drive for speedometer.
Gear ratios: top speed, 1 to 1, 3rd speed, 1.7 to 1, 2nd speed,
2.61 to 1, 1st speed, 5.27 to 1, reverse: 8.23 to 1.
Rear axle
Overtype worm, fully floating. The weight of the vehicle
and load was not borne by the axle shafts, and the whole of the
internal parts of the axle could be dismantled without jacking
up the vehicle, or removing the road wheels. Axle ratio, 6.75 to
1.
Front axle
'H' section steel stamping. The hubs were mounted on
taper roller bearings, easily adjustable for wear.
Steering
Worm and roller type. The side steering push rod
connections were of the spring loaded type and lubricated by oil
gun.
Suspension
Semi-elliptic-front and rear springs, made from specially
tested spring steel.
Frame
Pressed steel channel, 6" x 2½"
x ¼" section. Well trussed
with substantial cross members.
Brakes
Both brakes were of the internal expanding duplex type,
operating in the rear drums (15" diameter) each brake being
independently adjusted by means of a conveniently placed wing
nut. To permit of further adjustment to accommodate wear of
linings, the brake operating levers were serrated.
Front wheel brakes could be fitted, if
desired, at an extra charge of £25. The arrangement consisted of
internal expanding shoes in drums fitted to the front road
wheels. The foot pedal operated front and rear brakes together.
Radiator
Polished aluminium. Vertical gilled tubes.
Tyres
Pneumatics, 32in. x 6in. singles, including spare disc.
Electrical
The 12 volt lighting set consisted of a positive drive
dynamo, battery, switchboard, a pair side lamps, and a tail
lamp.
Fuel tank
Fitted on dash. 8¾
gallons capacity, gravity feed. |
