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Aviation History
1934
1934 - 0311.PDF
FLIGHT, MARCH 29, 1934 THE FOKKER D.XVII : This drawing shows the machine fitted with a Curtiss " Conqueror " engine. Later versions have the " Kestrel," Hispano-Suiza 12 Xbrs or Lorraine " Petrel." only. They are of wooden construction and are statically balanced. The undercarriage consists of two Messier oleo pneumatic struts running from the wheels to the lower longerons. These struts are braced to the rear by means of two streamline tubes, also attached to the lower longerons. The wheels are fitted with independently-operated brakes and the tail skid is sprung with rubber in compression. The fuel tank, which holds 57.2 Imp. gallons, is of welded sheet aluminium and is installed in the fuselage near the centre of gravity. The tank may be provided witha bulletproof covering, in which case its capacity is reduced to 52.8 Imp. gallons. A motor pump feeds the engine,and a hand pump may be installed if desired. The oil tank, also of welded sheet aluminium, holds 4.4 Imp.gallons. A " honeycomb " water radiator of the fixed type is mounted beneath the fuselage between the legs of theundercarriage. Temperature is regulated by shutters operated by the pilot. A Vickers-Potts oil cooler iscarried beneath the fuselage forward of the water radiator A Swedish Two-Seater Fighter: The Junkers IC47 T JNLIKE the majority of Junkers types produced during ^ recent years, the type K.47 built in Sweden by the A.B. Flygindustri was designed primarily as a military type. The aircraft is a braced low-wing monoplane, with the wing consisting of a centre section, which is integral with the fuselage and two outer sections of trapezoidal shape. Spherical screw joints connect the wings to the centre section, and a single strut braces each outer wing to the undercarriage. Structurally the wing is of typical Junkers multi-tube type, the torsional stresses being taken by corrugated sheet covering. A fuselage of oval section is used which consists of three parts, the engine section, the centre section con- taining the cockpits and the tail portion. The wing centre section and fuselage centre section are built up as one unit. Duralumin longerons are used, braced by transverse members of the same material. Unlike the wings, thefuselage has a covering of smooth sheet duralumin. Ailerons of high aspect ratio, statically and aerodynamic-ally balanced, are used. The tail plane is adjustable in flight and is provided with a self-locking spindle adjustmentcontrolled by a hand wheel in the pilot's cockpit. The elevators and tail plane are so large that the aircraft,when fully loaded and with the C.G. back, is still quite stable. Two fins with two balanced rudders are fixed tothe extreme ends of the tail plane. This arrangement allows a very wide rearward field of fire for the movablegun. One disadvantage, however, is presented, in that the machine is not so easily manoeuvred on the ground. Thishandicap is overcome by the provision of wheel brakes and a tail wheel. The controls are of the conventional stick and rudderbar type, and all joints are provided with ball bearings. A cross axle type undercarriage, using two Vickers oleopneumatic legs is fitted. The extremities of the axle are hinged by radius rods to two rigid Vee's interconnected
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