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Aviation History
1932
1932 - 0913.PDF
FLIGHT, SEPTEMBER 9, 1932 : THE HEINKEL He.64 This three-quarter rear view was taken at Heston shortly after the arrival of the Heinkels from Germany during the " Week-End Aerien." (FLIGHT Photo.) means 140/150 h.p. engine has m.p.h., can actually fly m.p.h., as was done, for wing tips. The leading edge of each wing is additionally equipped with two independent Handley-Page slots cover ing the whole length of the wing. The outer slats, having the length of the ailerons (1.93 m. or 6.33 ft.), are of the automatic type, while the inner slats are connected with the slow-flying flaps. It is due to these means that the machine, which with the Argus a maximum speed of some 155 without loss of altitude at 38.6 instance, by Junck and Seidemann during the slow-flying tests at the international meeting above referred to. The wing area of the machine totals 155 sq. ft., including the ailerons, which each has a surface of 5.23 sq. ft. The two cockpits are covered by a common, long cellon hood of streamline form, merging at the rear end into the top of the fuselage, which, as all parts offering air resist ance, has been most carefully designed. The seats in the cockpits are adjustable for height and leg length. Dual controls are provided, those in the rear being so designed that they can be " switched off " literally instantaneously by a small lever within reach of the front pilot. The stick and pedals then move freely without affecting the plane's steering. This is an excellent feature for school- work. The controls can additionally be taken out entirely and replaced and connected within a few seconds. Other wise the controls are wholly normal. Provision for the inspection of the cables, etc., is made by well-covered apertures in the fuselage. The tail surfaces, i.e., stabiliser and elevator, are entirely made of wood and have a long oval form, 9.02 ft. in length and 2.88 ft. deep, the depth of the elevator being 1.34 ft. The area of the stabiliser is 10.37 sq. ft. and that of the elevator 8.63 sq. ft. The stabiliser is adjustable during flight to the extent of + 3 and — 8 degrees. The rqynded rudder fin, which is braced by lateral wires against the stabiliser, has an area of 3.4 sq. ft., and the rudder is of 5 sq. ft. The undercarriage is of the divided type, with Palmer brake wheels and combined hydraulical and pneumatic struts. The wheels are not provided with spats. As already indicated, the machines are equipped with the new Argus engines of 140/150 h.p. maximum output. These irfverted engines are well faired by an aluminium casing, which is easily detachable. A variable pitch propeller of 6.88 ft. diameter is employed (generally set to a pitch of 4.59 ft.). The engine is mounted on a steel tube frame attached to the fire bulkhead in the usual manner. Extensive use is made of rubber for engine suspension, so that vibration is considerably damped. The engine draws its fuel supply by means of two diaphragm pumps from two tanks, one of which is situated immedi ately behind the fire bulkhead in the fuselage, while the other is arranged in the bulging parts of the fuselage between the first and second seat. The oil tank forms part of the nose of the right stub wing, where it is effec tively cooled by the slipstream. The machine weighs complete with instruments and ready for flight, but otherwise empty, 990 lb., and will take a load of 660 lb., so the full flying weight comes to 1,650 lb. The wing loading amounts to 10.65 lb. per sq. ft. E. P. A. H. HEINKEL-SPORT He.64. Some Editorial Comment The description of the Heinkel He.64 by our German correspondent, printed above, gives the main data, etc., of the machine. During the recent visit of the " week enders " a number of Heinkels were seen and inspected, and a good opportunity to watch their behaviour was afforded. Moreover, on Monday of this week Handley Page, Ltd., arranged a demonstration at Radlett, at which three of the Heinkels were flown. Thus one is able, quite apart from Herr Heinze's description, to form a very good idea of the qualities of the He.64. As a piece of workmanship" the Heinkel is an outstand ing example of German craftsmanship. The finish is such as is rarely seen anywhere, and the machines looked spick and span in spite of their strenuous time in the Interna tional Touring Competition. Something should be added about the slot mechanism, which is of a more advanced type than has ever been seen on an aircraft in this country. The wings are slotted and " flapped " over their whole span, slots as well as flaps being divided into what may be termed lift and control devices respectively. The inner slots, which extend from the wing root to the automatic wing tip slots, are automatic in action, and are so connected to their trailing edge flaps that when the slots open the flaps are pulled down to their full extent. The outer slots are also automatic, and are connected to the aileron flaps in such a way that as the slot opens the 849
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