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Aviation History
1935
1935 - 0819.PDF
APRIL II, 1935. FLIGHT. 393 FOREIGN AIRCRAFT A BOEING "EXPORT" FIGHTER New Model Developed from the P-26A : 232 m.p.h. : Range of 745 Miles A 550 h.p. supercharged "Wasp gives the Boeing 281 a speed of 232.5 m. interesting feature. The "treadle" type undercarriage is an THE performance of the Boeing P-26A has, since the machine first appeared, been largely a matter of con jecture to those outside American circles. Recently, however, an "export" version of this machine has been developed, which is almost identical with the U.S. Army type. It is known as the Model 281, and performance data on this type have now been released. An all-metal, low-wing, single-seater fighter, the machine is fitted with a supercharged Pratt and Whitney " Wasp " giving 550 h.p., and may be operated in any one of three conditions. As a fighter, with " normal " fuel and equipped with two 0.30 calibre machine guns, or one 0.30 and one 0.50 calibre gun, it has a maximum speed of 232.5 m.p.h. and a range of 386 miles at a cruising speed of 210 m.p.h. Equipped as a fighter, but carying "maximum" fuel and the same military load, it has a top speed of 230.5 m.p.h. and a range of 745 miles, cruising at 208 m.p.h: With " normal " fuel the fighter version climbs to 17,900 ft. in ten minutes, and has a service ceiling of 28,200 ft. Operating as a fighter- bomber, it can carry either five 30 lb. bombs, or two 122 lb. bombs at a top speed of 221 m.p.h. Of semi-monocoque construction, the fuselage embodies aluminium alloy bulkheads, longerons, skin stiffeners, and smooth-skin covering. The engine mounting is a welded- A BOLD BELGIAN EFFORT. This is a photo graph of a model o' the Stampe et Vertongen S. V\-io multi-seater bombing, reconnaissance and fighting machine now being constructed for the Belgian Government. It will have two Gnome Rhone 14 Krsd radials of 800 h.p. A maximum speed of 217 m.p.h. is called for by the contract, but this figure will probably be exceeded. steel-tube structure, and is readily detachable from the fuselage. The wing is divided into three parts—the wing stubs, built integral with the fuselage, and two outboard panels. These latter are braced by stainless steel streamlined wires. Spars of build-up I section and Warren truss-type ribs are employed for the wing, which is covered with smooth aluminium alloy skin. All-metal cantilever construction is used for the tail sur faces. These are easily removable from the fuselage. The tail plane is not adjustable, longitudinal trim being effected by small flaps let into the elevators and controlled from the cock pit. A small trailing-edge rudder "tab" provides for cor rection of slight rigging variation. No aerodynamic balance is incorporated in the rudder but the elevators have an " over hung " lea,ding edge, which tends to reduce forces on the con trol column, ensuring, it is claimed, lightness of control even in the most severe "pull outs" from dives. Trailing edge flaps are fitted to the wing, and are claimed to increase the angle of approach and reduce landing speed. Of "treadle" type, the undercarriage is so designed that the wheels may be easily removed. Boeing oleo shock- absorbers, 24 in. streamlined tyres, and individually operated wheel brakes are provided. . The steerable tail wheel is also equipped with a pneumatic tvre V
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