Engine Details, Adjustable Handle-bar, New Speedometer Position.
THE 2¾ h.p. Wooler has acquitted itself very creditable this year, both in local club events and at Brooklands, the long-distance records broken recently by Macnab testifying to its staying powers. It is a most interesting little mount, and fitted with a flat twin engine of 65 x 60 mm. (345 c.c.). It possesses many novel features, including a spring frame, which make it a very suitable mount for solo work.
Among the chief innovations for next year is a new inlet dome, which is now held by two long studs taking the pressure of the whole casting.
The new toolbags are fastened to the carrier stays by means of six bolts, which screw into the threaded lugs on the stays so that there are externally no visible means of support.
The speedometer is carried on the near side front fork member, has a short cable, and the spur wheel is held on a bracket which moves with the front wheel spring plate. The position of the speedometer has been so arranged that a glimmer of light proceeding from the ventilating holes underneath the lamp impinges on the speedometer dial.
The crank case is now die cast, and the same method is applied to the casting of the footboards, with the result that ? these are extremely neat. The whole machine has been most carefully thought out, the detail work is excellent, and the manufacturing methods are all that can be desired.
The manufacturers are the Wooler Engineering Co., Ltd., Alperton, London.
The Motor Cycle October 28th, 1920. Page 508
Wooler. (Stand 33.)
2¾ h.p.; 60.5x60 mm. (349 c.c.); twin-cylinder four-stroke; side exhaust, overhead inlet valves; mechanical lubrication; Amac carburetter, B. and B. (touring); gear-driven magneto; variable speed expanding pulley gear; belt drive; 26 x 2¼ in. tyres. Price £102 semi-T.T.; £103 10s. touring; £112 Brooklands.
Wooler Motor Cycle Co. (1919), Ltd., Alfreton. The Wooler exhibit comprises four models, namely, the standard touring model, which is practically identical with the successful machines of 1920, semi-T.T. (belt-driven), a Brooklands model (belt- driven), and the completely new Colonial model described below, which has a three-speed gear box and single chain drive. The main improvements in the three belt-driven models include a slight alteration in the inlet valve domes, which makes it easier to get at the valve cotters.
An ingenious crank case release is provided through a hole drilled in the magneto driving gears. The outlet is connected by a rubber pipe to a hole in the middle tube of the middle saddle tube. Released vapour travels down this tube to an oil tap connected by an armoured pipe to the engine sump.
The lamp and generator are mounted on a neat fitting which raises them a little, and the rays from the air vents in the base of the head lamp illuminate the speedometer, which is mounted in a circular clip on the left-hand side of the fork crown. The horizontally-opposed twin-cylinder engine and variable pulley gear remain as before, a drop of 100% in the ratio being available. The special Brooklands model is supplied under a speed certificate of not less than fifty-five miles per hour. The belt-driven models weigh 163 lb. The machine is designed with a special eye to economy and accessibility, the makers claiming that the average cost of oil, petrol, tyres, and belt for the first year does not exceed ¾d. per mile.
A new Colonial model has a three-speed gear box housed in the sump and running in oil. A disc clutch is combined with the gear box, and is hand-controlled. On this model a thrower disc on the engine-shaft is substituted for the chain lubrication employed on the belt-driven models. The single chain to the rear wheel is adjusted by sliding the power unit bodily oh the two tubes composing the engine cradle. This adjustment is locked by two bolts, and the exhaust pipe and box slide with the engine. A spare chain is carried in a light aluminium drum attached by a single control bolt to the base of the sump. The weight of this machine is 190 lb., and gear ratios provided are 4¾, 7½, and 15½ to 1 respectively.