The latest name to become associated with the Blackburne 350 c.c. engine is the Wolf, a new model of which, embodying this engine, is shown above.
As an intermediate between the lightweight and the 500 c.c. single, the 350 c.c. single-cylinder has taken a firm hold of the riding public. It has long been recognised that an engine of a size sufficient to propel a sidecar is unnecessarily large for purely solo use, while the motor cyclists who formerly used 500 c.c. machines of the lighter type require something a little larger than the popular lightweight. The 350 c.c. machine fills this need, hence the increasing popularity of the 2¾ h.p. Blackburne engine unit, which seems to find new sponsors every week.
One of the latest firms to adopt this engine is the Wulfruna Engineering Co., Ltd., of Wolverhampton, who have succeeded in producing a mount of very pleasing lines. The specification includes Brampton Biflex forks, Dunlop 26x¼ heavy tyres, Sturmey-Archer two-speed gear, with kick starter and hand-controlled clutch.
The finish is all-black with the tank relieved by a gold line, and the provisional price is 105 guineas.
The Motor Cycle August 26th, 1920. Page 247
Wulfruna. (Stand 16.)
2¾ h.p. Blackburne; 71x88 mm. (349 c.c); single-cylinder four-stroke; side-by-side valves; drip feed lubrication; Amac carburetter; C.A.V. chain-driven magneto; two-speed constant mesh gear; chain and belt drive; 26x2¼ in. tyres. Price £99 15s.
Wulfruna Engineering Co. (1920), Ltd., Great Brickkiln Street. Wolverhampton.
Finished in black and gold the Wulfruna range of lightweights is attractive both in appearance and in specification. Of sound and orthodox design, the list of fittings includes Brampton forks, Blackburne engine, and Sturmey-Archer gear box. Large rubber-covered aluminium foot-boards are provided, and the low riding position with wide handle-bars proves very comfortable on the road. Three lightweight models are available, but the chief difference lies in the power units employed, model A having a Blackburne engine, model B a two-stroke Villiers engine (price £75), and model C the 2¾ h.p. J.A.P. engine (price £80).
A larger model designed as a dual-purpose machine is fitted with a 4 h.p. Blackburne engine, and Sturmey-Archer three-speed gear box, although in other respects it is very similar to the light-weight models.
This also may be obtained if preferred, with the 4 h.p. J.A.P. engine, in which case the price is £100.