Fight. Drawing, description

MODELING
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Fight. Tips for a modeler

Modeling

This "fighter" was developed in the aircraft modeling circle of the regional station of young technicians in the city of Murmansk. Speaking with her at regional competitions, eighth-grader Sasha Baidov became the champion among schoolchildren. A design feature is a fiberglass wing toe, which greatly increases its survivability.

Start making the model with the wing, as this is the most complex structural element. To form a sock, make a snap - a matrix and a punch. Plan the last one from a pine bar, cover with six layers of enamel and sand. The matrix is made on a punch from two layers of fiberglass with slats glued between them for rigidity. The gap between the surfaces of the matrix and the punch is within 0,6-0,8 mm.

To form the sock, take three layers of fiberglass with a thickness of 0,08 mm. As separating layers between the matrix, fiberglass and punch, use lavsan film with a thickness of 0,15-0,2 mm. After gluing, the sock will receive a mirror surface, and no further processing is required.

Make the wing spar out of two pine shelves (section 3x3 mm at the root, 1,5x3 mm at the end) and foam filler. Rib material - pine; they are all the same shape. The wingtips are also made of pine or linden, 3 mm thick. Flaps and empennage made of 2 mm thick pine plate.

The fuselage is similar in design to the wing spar. The motor mount bars are made of birch, the rest is made of pine.

Rice. 1. "Fighter" with a fiberglass wing toe (click to enlarge)

Rice. 2. Details of the model (click to enlarge): 1 - rocker mount, 2 - control rods, 3 - rocker, 4 - flap deflection lever, 5 - elevator deflection lever, 6 - flap drive, 7 - fuselage, 8 - tank, 9 - rib, 10 - spar

Rice. 3. Matrix and punch for making a sock (click to enlarge)

First, assemble the right side of the wing. Glue the ribs, spar, trailing edge with epoxy, then insert into the fuselage. After that, assemble the left part of the wing. Adjust the ribs in its end parts in place. Note that the tails of the ribs cut into the trailing edge by 2 mm.

Glue the fiberglass toe and ends last. Insert copper tubes into the left end to bring out the cord. When assembling the wing, do not forget to insert the flap actuator. Each of them is suspended on 12 strips of nylon fabric measuring 8x20 mm. The wing is pasted over with long-staple paper and covered with enamel three times (it is more technological to use lavsan film for pasting the model.)

Mount the rocker on an axle made of wire Ø 1,5 mm, which is inserted into the hole in the fuselage bars and secured against falling out with two flush-mounted plywood pads 1 mm thick. Glue the tail spike made of OBC wire Ø 1 mm, on resin, into the tail section of the fuselage. Hang the elevator in the same way as the flaps on 12 strips of fabric. To protect the propeller of the model during landing, fasten a wire Ø 2,5 mm, 100 mm long, with the lower motor mounting screws.

At the ends of the control rods, install locks (ring locks) from sewing pins, stick the L-shaped ends into a wooden rod and secure with glue.

The model is equipped with a KMD-2,5 engine with a propeller 160x200. Tank of conventional design. The weight of the "fighter" is 370 g.

Author: V.Novoseltsev

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