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Aviation History
1931
1931 - 1079.PDF
FLIGHT, OCTOBER 9, 1931 IN FLIGHT : The port rudder is seen swung outward to make the machine steer to the left. rudders have a flat surface facing outwards, the inwardsurface facing towards the fuselage has a pronounced camber. The two rudders work independently, as theirmanner of operation is different from that of rudders on normal machines. The left rudder is solely connectedwith the left and the other with the right pedal, and when the machine is required to make, say, a left-handturn, only the left pedal is moved, while the right remains stationary, and vice versa. By depressing the pedal thecorresponding rudder is swung out and the air resistance thus caused retards the motion of the wing tip, while theother wing tip swings round unobstructed, so the machine makes the required turn. If both rudders were tobe depressed together, it would merely reduce the machine's speed without causing it to turn. The undercarriage consists of three independently-sprungwheels with low-pressure tyres. The two wheels under the wing, one each side of the fuselage, are enclosed in astreamlined casing secured to the wing, inside which rubber-cord-type shock absorbers are located. These arevisible through cellon panes let into the top of the wing for inspection purposes. Similar inspection windows areprovided at all points where the control cables used run over pulleys. The small front wheel is likewise encased,the casing forming a continuation of a perpendicular fin depending from the front end of the fuselage. The wheelcasing, with the wheel, can be steered by means of a tiller in the cockpit, which, however, is only used formanoeuvring on the ground. The span of the wing is 13 metres (42.65 ft.), and itslifting surface has an area of 25 square metres (269.1 sq. ft.). Fully equipped, but otherwise empty, the machineweighs 320 kilograms (704 lb.), and is capable of transport- ing a load of 200 kilograms (440 lb.). making a gross flyingweight of 520 kilograms (1,144 lb.). The wing loading thus amounts to only 4.25 lb./sq. ft., and the power load-ing is as high as 39.4 lb./h.p. The maximum speed of the machine is said to be 155 kilometres per hour (96.4m.p.h.), and its cruising speed 140 k.p.h. (87 m.p.h.). The highest altitude so far reached is stated to be 4,700metres (15,400 ft.). In the hands of the pilot Groenhoff, the machine showeda surprising degree of manoeuvrability. Groenhoff said the plane steers very lightly, and he can do anything with itwhich he can do with any good normal machine, including looping. The latter were, however, not shown at the de-monstration. The machine flew very close circles and zoomed up in a manner that would appear to indicate itshaving plenty of reserve power. It seemed practically non-stallable. THE POWER PLANT: The engine is a Bristol "Cherub" driving a pusher airscrew. 1009
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