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Aviation History
1943
1943 - 2319.PDF
SEPTEMBER 23RD, 1943 heir Characteristic LAGG - 3 DIHEDRAL AIR SCOOPS MODERATE TAPER SMALL AREA OIL COOLER RADIATOR DIMENSIONS. Span Length Height Wing area 31ft. 9n. 29ft. 6in. 8ft. 4'm. 188 sq. ft. UNDERCARRIAGE RETRACTS INWARDS WtNC NUT IAILPLANE ROUNDED TIPS NOTABLE for its wooden construction, the Lagg-3has proved itself to be among the best of the Rus-sian Air Force's single-seater fighters and has been in mass-production for some time. Powered by a 1,100 h.p. 12-cylinder, liquid-cooled, V- type M-105P engine, the Lagg-3 aas a top speed of approxi- mately 350 m.p.h. at 16,400ft., a cruising speed of 279 m.p.h., a service ceiling of 29,500ft., and 400 miles range. A little smaller in overall dimensions than most British and American single-seater fighters, the armament of the ^agg-3 does not sound very impressive these days, being limited to one 20 mm. cannon firing through the airscrew hub, and two 12.7 mm. machine guns mounted in the nose and synchronised to fire through the airscrew disc. Ihe wings incorporate two box-spars and the fuselage isa monocoque structure, both having a diagonal plywood skin in Russian birch ; the forward part of the fuselage, however, is metal covered, and the framework of the cock- pit hood and the control surfaces are of metal, the latter being fabric covered. In spite of the main structure being of plastic-bonded wood and plywood, the Lagg-3 weighs 7,056 lb. in flying trim, which gives a wing-loading of 37.4 lb./sq. ft. From the purely recognition point of view, the Lagg-3 has several helpful characteristics. From the head-on view (generally the most difficult) the twin air-intakes in the thickened roots of the wings should be visible under reason- able conditions, and from the side view the unusual depth of the fuselage at the tail, and the straight, level line from cockpit to fin are notable features. Additionally there is a long but shallow oil-cooler beneath the nose, and the deeper projection of the radiator amidships under the fuselage. Fin and rudder are small and have a curved trailing edge and apex, while the "wing-nut" type tailplane is set above the thrust line. The wings taper more on the trailing edge and have rounded tips.
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