
The proposed model is made by the known, so-called “Moscow” scheme. Its main feature is folding the rotary wing. It is made of balsa plate with a thickness of 3.5 mm. the Center section — size 340×65 mm, ears length 140 mm — trapezoidal shape. All three elements of the wing shaped and edged for rigidity along the contour of the fake rails. The width of the front edge of 2.5 mm, the rear is 3.5. The connection of the center section and “ears” swivel, silk strips of 12 mm width, glued on the bottom. From the top, at a distance of 20 mm from the axis of rotation, affixed the hooks, wire, allied with a diameter of 0.5 mm for hanging rubber bands return “ears”. Where you touch the rubber bands to the plane of the wing are reinforced with celluloid overlays. On the center section of the fixed back two hooks. One, closer to the center, the left half for the elastic return of the wing, the other on the right, closer to the edge— thread for the fixing of the wing during takeoff.
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