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Aviation History
1936
1936 - 2329.PDF
222 FLIGHT. AUGUST 27, 1936. The sporting lines of the new Brown B-3 monoplane, described below, are seen to advantage here. THREE from ABROAD Monoplanes for the Sportsman, Air Force and Navy: British Features THE development of aeronautics must necessarily be conducted on a give-and-take basis. Ideas must continually be interchanged, with the result that many of the world's finest aeroplanes are pot pourris composed of the pick of international ingredients. Great Britain does her share in contributing to the common store of technical developments, and we find that the new American Brown B-3 monoplane described here after incorporates Handley Page slots and flaps and that Bristol Mercury engines are specified for the Dutch Kool- hoven bomber. The Broun B-3 Brown-built racing monoplanes are held high in popular esteem at the American National Air Races, and the success they have achieved has encouraged the manufacturers, the Lawrence W. Brown Aircraft Company, of Los Angeles, to build a machine suitable for private ownership, the design being based on that of Miss Los Angeles, perhaps the best-known Brown model. Although the new machine " Close ups " of a Handley Page slot and the flap and aileron arrangements on the new Erown monoplane. is primarily a civil type, negotiations have been proceeding with several governments which may result in a military version for fighting or observation. Essentially, the machine is a wire-braced low-wing mono plane with fixed undercarriage. The construction is mixed: welded steel tubing is used for the fuselage; the wings are of wood with wire bracing; and the covering is of fabric, except for the engine cowling and decking round the pilot s cockpit. Although designed as a two-seater with dual controls the first machine of the series has been arranged as a long- range single seater to special order. A sliding hatch is fitted over the cockpits. The chief distinction between the machine and its sport ing ancestors is the provision of Handley Page automatic slots, manually controlled slotted flaps and slotted ailerons. A further outstanding feature is the use of the newest 250 h.p. supercharged Menasco six-cylinder inverted, in line, air-cooled Super Buccaneer engine, which is installed in a cowling arranged on the N.A.C.A. principle with an annular slot at its rear end. The power plant is rated at 6,000 and will deliver 200 h.p. at sea level for take-off. Although it has been announced as optional equipment for the new Lockheed 12 twin-engined transport, and will be specified for one or two of this year's crop of new machines for the Naticnal Air Races, it is introduced commercially for the first time in the new Brown. An unusually wide speed range is claimed, the landing speed being about 40 m.p.h. and the maximum 205 m.p.h. The prototype has been specially equipped for a private owner and carries blind-flying equipment, two-way radio and engine temperature thermocouple. A fully controllable Hamilton Standard airscrew is likely to be installed in the near future. The main data are as follows: Span 32 ft., length 26ft., weight empty 1,850 lb., gross weight 2,650 lb., wing area 150 sq. ft., wing loading 17.6 lb./sq. ft., power loading 10.6 lb./h.p., maximum speed 2,05 jn.ph., cruisi:tg speed 190 m.p.h., landing speed with flaps 40 m.p-h., land ing speed without flaps 60 m.p.h., service ceiling 18,000 ft., normal cruising range 600 miles. The Koolhoven F.K.50 B Although considered as a development of the Koolhoven F.K.50 commercial" machine described in Flight of Octo ber 3, 1935, the new Koolhoven twin-engined bombei resembles that machine only in structure. Outwardly there is little which tells of its ancestry. From the military stand point the type seems well planned and is blessed with quite an extraordinary performance; with two Bristol Mercury
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