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Aviation History
1933
1933 - 0703.PDF
FLIGHT, OCTOBER 5, 1938 The passengers have large windows in the cabin of the Emerald. (FLIGHT Photo.) FAST AIR-FRANCE 1. For 1,000 km. (621 miles), carrying a useful load of 2,000 kg. (4,400 lb.) at an average speed of 259 km.p.h. (161 m.p.h.). 2. For 2,000 km. (1,242 miles), with a useful load of 500 kg. (1,100 lb.) at an average speed of 255 km.p.h. (158 m.p.h.). 3. For 2,000 km. with a useful load of 1.000 kg. (2,200 lb.) at an average speed of 255 km.p.h. (158 m.p.h.). 4. For 2,000 km. with a useful load of 2,000 kg. (4,400 lb.) at an average speed of 255 km.p.h. (158 m.p.h.). In addition to the 2,000 kg. of useful load, the plane carried more than 630 kg. (1,386 lb.) additional cargo represented by its equipment, the radio apparatus and the five men of the crew. The take-off, with an all-up weight of 10,886 kg. (23,849 lb.) was effected in 300 m. (975 ft.), with the engines running at 1,950 r.p.m. This rate was reduced to 1,750 r.p.m. for the rest of the flight. In addition to making these new records this Dewoitine D.332, during its recent trial flights to obtain its naviga tion certificate, flew at the rate of 300,8 km.p.h. (187 m.p.h.) over the regulation course of the Service Tech nique at Villacoublay. From a living point of view the Emerald is very in teresting. Its controllability over a very large speed range is remarkably good. We found that in the air one still had ample control at the bottom end of the range, when the A.S.I, was showing 100/110 km.p.h. (62/68 m.p.h.), while at the top speed of about 300 km.p.h. (187 m.p.h.) the controls, though naturally heavier, were not for such a large machine, unduly so. A point about the controls which we found particularly pleasing was the fact that they were almost all of the same weight. Being unbalanced and large they are, of course, heavy, but having the elevators about the same weight as the ailerons made the machine far nicer to fly than is often the case with aero planes of this type. The trimming gear, both for the elevators and the rudder, was very effective, and it was quite possible to trim the machine to fly " hands and feet off " for any degree of climb or turn and at any speed. The rudder trim is achieved by a small adjustable flap which is a portion of the trailing edge of the rudder, and this is worked by screw gearing from a conveniently 991 c 2 ON Tuesday, September 26, we were privileged to try the latest addition to the Air-France fleet. This aeroplane, the Dewoitine D.332, has already been described (see FLIGHT for August 10), but until last Tuesday it had not been seen in this country. This particular machine, the prototype of the class, and called Emerald, has already achieved fame by flying to Russia with M. Pierre Cot, the French Air Minister, and party, and also by the new world's records which it ob tained shortly before that flight, at Villacoublay Aero drome, on September 7, with a crew composed of Marcel Doret, the Chief Pilot of the Dewoitine Co., Capt. Ter- rasson and Lt. Lecame, of the testing staff of the Service Technique, and two mechanics. The records were: — This shows the clean way in which the wing engines have been streamlined into the wing and undercarriage fairing. This latter forms an excellent shield to prevent the glare of the landing flares disturbing the pilot. (FLIGHT Photo.)
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