In order for the manufactured model of the aircraft to be forced in the air for a long time and in general could rise into it, it is necessary to take into account the important features of the structure and functions of each part when gluing. The procedure for assembling a foam model of an aircraft on a rubber motor will demonstrate this.
It is necessary
- - plywood
- - glue;
- - wire;
- - thread;
- - sandpaper;
- - rubber thread.
Instructions
Step 1
Cut a strip 400 mm long from linden or pine. By two thirds, it should have a section of 20x20 mm and by the end it should become already up to a section of 10x10 mm. Round off sharp corners and remove burrs by carefully sanding the rail.
Step 2
Give the stabilizer and wing the same profile as the simpler glider models. Warm up the foam over the bulb and bend two keels on the stabilizer, and two ears on the wings. To reinforce the wing, glue thin paper or a piece of Whatman paper underneath.
Step 3
Make the propeller type-setting. Make a hub out of straw or carve out of linden or pine. Cut out the blades from paper, which should look like an oval tapering towards the outer end. Glue them to the hub with any glue.
Step 4
Make a screw shaft. Use round nose pliers or tweezers to bend the 0.5 mm steel wire into a "t" shape. Determine the middle of the screw hub, tie the shaft with threads, which then coat with glue.
Step 5
Attach the shaft to the hub so that the blades draw in air at equal angles. To check, place the screw between the wall and the lamp so that the plane of rotation of the screw can pass through the lamp and be perpendicular to the wall. The shadows of the blades should be equal to each other in width.
Step 6
Attach the shaft to the fuselage. For this, take a block of foam or linden 2 mm thick, 4 mm wide and 4 mm long. This is a shaft bearing. Glue a strip of Whatman paper on the front and back. Glue the block to the rail, aligning it with the front end.
Step 7
To make the rotation of the screw easy, make two or three washers out of metal foil. Punch a hole below the center of the bearing using a sharpened piece of wire. It must be strictly parallel to the fuselage.
Step 8
Place the washers on the screw shaft and thread the screw through the bearing. If the shaft protrudes from the bearing more than a centimeter, bite off the excess with pliers. Bend the end of the shaft into a ring with a diameter of about 2.5 mm and correct it so that it takes a position symmetrical to the axis of rotation.
Step 9
Cut 20mm of the same wire used for the shaft and bend the hook. Attach it with glue and threads to the fuselage. Measure the distance between the shaft and the hook, triple the result. Take a rubber thread Ø1 mm, a length equal to three times the size, and tie into a ring.
Step 10
Hang the rubber motor on the hooks. To determine the center of gravity of the model, lay the fuselage horizontally on a thin rail or knife edge and balance. The center of gravity is the point of contact of the rail or knife with the fuselage.
Step 11
Glue the wing, positioning it so that the center of gravity is 5-10 mm closer to the front edge of the wing, starting from the middle. Form the propeller blades. Spin the rubber motor until the thumbs are formed and start the model with a light jolt.
