M.Goodall, A.Tagg British Aircraft before the Great War (Schiffer)
Deleted by request of (c)Schiffer Publishing
FORBES & ARNOLD monoplane (Victor F.E. Forbes and Arthur J. Arnold, Leighon Sea, Essex)
This machine was the subject of Patent No.20846/1909, although it was considerably later when details and illustrations appeared in Flight.
The upper part was a boxkite unit of diamond shape, with additional surfaces in the form of long flexible sails on either side. The lower part was a four wheeled chassis, with the operator seated on a wicker chair. Pitch and yaw control was to be obtained from the surfaces with marked anhedral, mounted at front and rear, stability being achieved by the pendulum effect. A low powered motor, mounted on the chassis, drove a tractor propeller by belt. The first engine was water-cooled, probably a car engine, requiring a radiator, and gave insufficient power. This was replaced and a corrugated blade propeller fitted, probably a Cochrane, with which a brief flight is believed to have been made at Rochford.
The structure, made of tube or bamboo, appears to be flimsy and the whole concept seems impractical. Nothing further was heard of this machine.
Area 350 sq ft
Weight allup 4501b
P.Lewis British Aircraft 1809-1914 (Putnam)
Forbes and Arnold Monoplane
Victor F. Forbes and Arthur J. Arnold built their single-seat tractor monoplane at Leigh-on-Sea, Essex, in 1909. It was of extremely unconventional design, intended to secure natural stability, as described in their Patent No. 20846 of 1909. Although successful flights were claimed with models of this design, there is no record of any full-scale flying being accomplished. Span, 16 ft. Length, 24 ft. Height, 10 ft. Wing area, 350 sq. ft. Weight loaded, 450 lb.
Flight, November 11, 1911.
Having read with considerable interest the letters of Harold Kelk and Will H. Booth, and having ourselves, for a long time, been experimenting on the lines adopted by these gentlemen, we send you photographs (reproduced herewith) of our full-size machine, which we have built as a result of our successful experiments with models.
We patented it in 1909. The patent No. is 20846, and we append particulars of size which, with the photograph now sent, will enable you to see the principles upon which we have built:-Length, 24 ft.; width, 16 ft.; height, 10 ft.; surface, 350 ft.; weight with pilot, 450 lbs.
The principal objects we studied to accomplish in creating our machine were - 1st, safety; 2nd, natural stability; 3rd, simplicity in steering, elevating, &c.; 4th, small motive power; finally, low cost of building. The lifting surface is so arranged that, in the event of the engine stopping, the machine will descend in a series of glides, and settle on a level base.
It is seeing that our ideas are apparently coming into vogue that it seems advisable to explain our position.
Leigh-on-Sea. VICTOR F. FORBES, ARTHUR J. ARNOLD.