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Aviation History
1932
1932 - 0738.PDF
FLIGHT, JULY 22, 1932 ABOVE : On the left one of the wing engine mountings. On the right a wing engine installation. (FLIGHT Sketches.) ON THE LEFT : The oil tank of each wing engine is mounted in the fairing behind the engine. (FLIGHT Sketch.) The aerodynamic efficiency also appears to be above the average. The Everling " High-speed Figure " —— has a value of 20.25, which points to a very low minimum drag coefficient. In appearance the " Cruiser " is certainly " clean," and the performance indicates that there is good scientific foundation for this impression. The cabin of the " Cruiser " is very well arranged, with comfortable seats along the sides, a good view through windows in the sides, and excellent lighting through the side windows and the roof lights. Fuselage.—The fuselage is of metal construction throughout, and follows closely in principle, although not, of course, in actual shape, the hulls of the " Saro " flying boats. A series of light frames give the fuselage, its transverse sections, while, the planking or covering is of " Alclad," stiffened by longitudinal corrugations spaced several inches apart. The planking is riveted to the frame flanges. Wing.—The cantilever monoplane wing is of all-wood construction, with two main spars of box section, having spruce flanges and three-ply sides. The wing ribs have spruce flanges and three-ply webs, and the covering is a three-ply skin which assists in providing torsional stiffness. Near the fuselage the wing covering is thickened and stiffened to form a walkway to the cabin door. Tail Unit.—The complete tail unit is a Duralumin structure covered with doped fabric. The rudder and elevators are provided with horn balances, and tail trimming is by a screw jack operated by a wheel in the pilot's cockpit. Power Plant.—The three De Havilland " Gipsy III " engines are mounted two in the wings and one in the nose of the fuselage. If desired, alternative types can be fitted provided they are of reasonably the same power and general type. The engine mountings are of steel tube construction, and the wing engines are faired carefully into the wing surface. As the central engine is rather high above the ground, it has been fitted with hand-turning gear. The outboard airscrews are within reach from the ground, and the outboard engines are therefore started by swinging the propellers. Fuel System.—There are two main petrol tanks, housed in the wing between the main spars, each tank being situated in the wing just behind its engine. Each tank has a capacity of 60 gallons (273 litres), which gives the machine an endurance of six hours at an economical cruising speed of 110 m.p.h. When the machine is used as a passenger carrier the tanks will not normally be filled up, but will contain enough fuel for about four hours' cruising. The tanks are interconnected with large balance pipes. Each engine is provided ON THE " CRUISER " : Left, the aileron crank and its fairing. On the right the tail wheel, which is sprung and swivelled, the sideways movement being limited by rubber buffers. (FLIGHT Sketches.) 690
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