Two-speed 3½ h.p. Douglas, minus friction clutch. Observe the chain case enclosing the drive from engine to countershaft.
Douglas Bros., LTD., Kingswood, Bristol.
A large stand is reserved for the Douglas motor cycles, three different patterns of which are marketed for 1911. Each, however, will have the same power unit, consisting of the well proven 2¾ h.p. twin-cylinder horizontally opposed engine, separate silencers, and with the magneto mounted on top of the crank case. The three-chamber carburetter is retained, but minor additions include a gauze covered air intake, and also a special gauze covered pipe conducting warm air from the radiators of the rear cylinder.
The three models include the already popular single-geared mount in its improved form, the dog clutch two-speed gear model, and the open frame two-speed and free engine machine, which is intended for either ladies' or gentlemen's use. The free engine machine is provided with a neat method of handle starting, and all the two-speeders have long comfortable foot-boards, enabling a change of position.
Minor refinements include a special form of tank clip, which will effectually prevent any possibility of the tank fastening giving way, glass gauges to petrol and oil compartments, side extensions to front mudguards, a spring clip for the stand, pannier toolbags, and a special lamp bracket, which is attached directly to the steering head, insulating thereby the lamp from road vibration.
1910 Olympia Show
Sectional view of Douglas two-speed gear and friction clutch with starting handle. The pedal on the left-hand footboard operates the clutch.
Douglas Bros. Bristol. Stand No. 89.
The twin-cylinder Douglas will be the centre of attraction on this stand. It is a machine with a very high reputation, and has performed with great credit to itself in many of the most strenuous competitions which have been held in this country, and is one of a specification which has many features of outstanding merit. The engine is a 24 twin-cylinder with 60 mm. bore and 60 mm. stroke; the cylinders are bolted on, and are easily detachable; the pistons have lubricating lips, and are each fitted with three rings. No gudgeon pin set-screws are used, the gudgeon pin being driven in tight, and capped at both ends with copper. Very wide bearings of phosphor bronze are fitted; the crank shaft is of mild steel, case-hardened. The induction valves are automatic, the exhaust valves being mechanical and adjustable. Ignition is by Bosch magneto, and control is entirely from the handle-bar. Druid spring forks of registered design are fitted, and the frame is built of butted steel tubes, very low, with a long wheel base, and possessing detachable and adjustable footrests. The pulley is made adjustable for wear, having one loose and one fixed flange. These can be brought closer together by substituting a narrower distance sleeve. The total weight of this machine is about 100 lbs. Its finish is of the very highest quality, and altogether is a bicycle which is bound to be even more popular in 1911 than in the 1910 season.
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