Sheillex Chassis Substantially Unchanged Only Minor Modifications in Normal and
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Semi forward control Types Will be Made. OTH the 2-ton and 24-ton types of
Shefflex chassis will, during the forthcoming year, be marketed in substantially the present form. Naturally, such small alterations as are being made will be incorporated in the exhibits at Olympia. Although chassis can be obtained with semi-forward control, if the additional loading space thus provided be of particular value to the user, we understand that the machines to be shown will be of the normal-control variety.
Most of the changed features concern the engine. Instead of straight-toothed timing wheels thc teeth are now cut helically to give greater silence. The belt drive to the dynamo has been abolished in favour of a positive drive. Behind the distribution casing on the near side is a bracket for the dynamo, and the magneto is carried behind that component. A vernier coupling is inserted in the drive to permit variable ignition timing. Certain details have been altered in the design of the camshaft.
An entirely new item in the specification is that the air intake for the carburetter is coupled to the crankcase. The oil-laden vapour from the crankcase is drawn into the carburetter and this gives a measure of upper-cylinder lubrication, which should tend to feed oil to the stems of the inlet valves.
In order to give greater flexibility to the front suspension the rearward portions of the front springs have been lengthened ; that is, the parts behind the axle.
As heretofore, a fonr-cylinderedengine will be employed ; this has the cylinders cast in pairs, the combustion chambers being L-shaped; the cylinders have fixed heads and the valves are ranged along the near side. Ball bearings are used for the camshaft and crankshaft. The gudgeon pins are pinned in the piston bosses. The R.A.C. rating is 24.8 h.p., but the maximum output is over 47 b.h.p.
A cone clutch is mounted in the caststeel flywheel and drives a short coupling shaft to the separate gearbox, which provides four forward speeds. Gear control is by the driver's right hand. Hotchkiss drive is employed, both driving and torque loads being taken by the semi-elliptic springs. The rear axle is of the overhead-worm nattern. Prices are not yet available.