After nearly a decade, resumed the holding of the all-Union sorevnovanii model airplanes-students. They will vystupat in teams of young men with models of three new classes: glider A-1, rezinomotornaya In-1 contour cord model-copy aircraft. Competitions will be held in Odessa from 4th to 10th August 1977.
TECHNICAL REQUIREMENTS OF NEW CLASSES OF MODELS:
Glider A-1: area of bearing surfaces 17-19 of DM2, the minimum weight is 220 grams, length of rail not more than 50 m.
Rezinomotornaya model airplane In 1: midleware square cross-section at least 20 cm2, the maximum rubber motor weight of 20 g, the minimum flight weight 100 g
Contour cord model-copy aircraft: maximum engine capacity — 2.5 cm3, a model may have a contour (not volume) of the fuselage.
Today we publish the drawings and description of a simple model of the airframe A-1.
The FUSELAGE. The bow part is made from lime plate 10 mm thick with cutouts for ballast. The tail — stacked design: the upper third of the lower plate of grained pine, four formers from balsa. The sides are covered with balsa plates, and in the bow — plywood with a thickness of 1 mm. keel, embedded in the fuselage — balsa plate. Hook-towing — wire OVS Ø 2 mm, glued on the epoxy resin. The demon of the fuselage 151 g
WING — set of two halves. Every 16 primary ribs — balsa and four root — plywood with a thickness of 1 mm. they drilled holes Ø2 mm for the pins. The corner rib of the fake veneer. The front edge of the pine rail section 4×4 mm. the Frontal portion of the wing to the width of 10 mm sewn with balsa. The spars cross-section 4×2 mm, made of pine. Trailing edge balsa plate, the cutouts of the ribs is made with a scalpel.
Profiles of the wing and stabilizer.
Wing covered macalintal paper, four times covered with Amalita. Weight 58 g.
STABILIZER — PLANO-convex profile with a relative thickness of 9%. Ribs and edges are made of balsa, spars — Linden. The weight of the stabilizer 12 in
The pins for joining the wing — wire, EIA, front, Ø 2.6 mm, rear Ø 2 mm, hardened.
All up weight is 221 g.
V. ROZHKOV, master of sports of the USSR
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