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Aviation History
1921
1921 - 0812.PDF
lam DECEMBER 8, 1921 machine, formed mainly by steel strips riveted together to form box-section members. The engine is totally and neatly cowled-in, the camshaft casings being housed in aluminium troughs formed in the engine cowl. The wings, which are of the thick, high-lift type, are at- tached to wing roots formed on the top of the fuselage, and the absence of any external wing bracing results in a very neat and clean appearance. In this connection it is curious to compare the Nieuport-Delage monoplane which won the Coupe Deutsch and the Hanriot racer. While there is something slender and graceful about the Nieuport-Delage, something almost feminine, there is a look of strength and power about the Hanriot, which is nothing if not masculine. One would imagine that as regards speed the two machines should be fairly evenly matched, fitted as they are with the same type of engine. And it might seem reasonable to , suppose that the Nieuport-Delage, with its thin wings and single lift strut on each side, coupled with a. fuselage of much smaller cross-sectional area, would be a match for the Hanriot. However, although the Hanriot fuselage is " fatter " it is quite conceivably of better streamline form than that of the other machine. The pilot is placed fairly far aft, level, approximately, with the trailing edge of the wings. In front of him he has two radiators which rest on the top of the fuselage, with their tops leaning together. This arrangement would not appearN to be calculated to improve the view, and one wonders why Hanriot has preferred this arrangement to fitting the ubiqui- tous Lamblins between the undercarriage struts. Certainly he is not likely to have done it without good and sufficient reason. An undercarriage of the usual simple Vee type is fitted, and one confesses to a certain amount of disappointment at not seeing the retractable undercarriage which was contemplated for the actual Coupe Deutsch race. As ex- hibited the undercarriage showed few features of interest, beyond the fact that circular pieces of fabric had been doped on to the sides of the tyres, so as to streamline as far as possible both wheels and tyres. These patches covered the whole wheel, with the exception of the actual tread of the tyres. The tail of the Hanriot racer is of ordinary type, but one noticed that the fin covering (of the upper fin) is a hollow Under the fuselage is an adjustable fin, which has a single pivot, and can be so set as to counteract the tendency to turn experienced when the engine is running " all out." The support of this fin does not look particularly substantial, but in view of the metal construction may be safe enough. Altogether the Hanriot monoplane is, in the main, a very fine piece of design, and the workmanship is excellent, especially The Hanriot Racer : View inside the cockpit, showing mounting of petrol tanks. as regards the various parts formed out of aluminium sheet by beating. The ailerons are covered with aluminium, and have their control tubes inside the wing. The second machine exhibited is a Hanriot school machine, type " H.D. 14," with dual controls. It is an ordinary tractor two-seater biplane, with 80 h.p. Le Rhone engine. It is chiefly remarkable for the four-wheeled skid type under- carriage, evidently designed to withstand the average landing of a pupil. The dual controls are of a special type, dit dibrayabh, in which, by means of a Bowden cable, the pupil's controls can be instantly thrown out of gear, if he makes a '„•••.-••'• ''-,-•• " Flight" Copyright SOME DETAILS OF THE HANRIOT MONOPLANE RACER : The sketch on the left shows the mounting of the radiator above the fuselage. In the centre is part of the streamline undercarriage. The wheels have fabric discs doped on to cover all grooves, etc., except the tread of the tyre. The fin covering, shown on the right, is aluminium sheet, and is held on by turn-buttons. shell of aluminium sheet, which appears held down to the fuselage by turn-buttons. Whether there are any internal •/ attachments one is not able to say, but, if not, the attachment by means of turn-buttons does not appear any too secure. Where the lower edges of the fin cover overlap the top of the tail plane the joint is covered with a strip of fabric, doped on. mistake. The. details are quite simple, consisting of pins operated by the flexible cable, the withdrawal of which results in the sliding of the pupil's control lever and foot bar telescopi- cally in their tubes without affecting the external portion of the controls.1 The arrangement is, we understand, the subject a Hanriot patent. 8l2
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