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Aviation History
1910
1910 - 0288.PDF
1/H9 APRIL 16, 1910. ANOTHER ALL-BRITISH BIPLANE. DETAILS OF THE DE HAVILLAND MACHINE. The Central Girder. RUNNING from end to end, and causing the entire propelling mechanism to form a single unit with the elevator in front and with the tail and rudder behind, Concluded from bage 268.) carrying the propellers with their bevel gear, tubular members are employed branching out on either side of the main girder, and here it may be observed that the engine lies snugly with its comparatively short crank- The wreck of "Haviiland I," denoting the inadequacy, as regards strength, of this 850-lb. machine. the large girder is built up of wood with metal clips and steel wires as indicated in our illustrations. The longitudinal members have a cross-section of 1^ in. by 1^ in. at the thickest part, and each is made in two parts, lap jointed at the centre, while beneath these members shaft at right angles to the direction of travel, while continuation shafts are carried from both its ends to the bevel gear-boxes into which the longitudinal propeller- shafts also pass. A very compact substitute is thus obtained for the more usual chain drive, and an engine of View looking down on the Haviiland engine, as it appeared within the main girder after the smash. in the immediate neighbourhood of the engine are fitted angle-steel stiffening members, each of which is about 3 ft. 6 ins. long. At the widest place this girder is 2 ft. 4 in. wide by 2 ft. deep, while the lattice members at the rear (which are added subsequently to original intentions) are \\ in. wide by \ in. in depth. For the de Havilland type is thus caused to'stow very snugly away. The Main Planes. These are built up in four parts, each pair of which is bolted together by means of flitch-plates and is then 286
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