parachute models. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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parachute models. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

G. E. Kotelnikov in 1911 invented for the first time in the world a comfortable parachute for pilots, which operates flawlessly in any conditions. The action of the parachute is based on the air resistance of the large surface of the parachute, which slows down the descent.

The figure depicts the sequence of folding a square sheet of paper to obtain the simplest model of a parachute:

parachute models

Make a small hole in the center of the dome for stability when descending. Tie 4 slings of thread to the bent corners of the dome. Attach a small weight to the ends of the straps. If you have thin white or colored tissue or writing paper, you can build a model self-descent parachute.

Take a square sheet of paper measuring 500x500 mm and fold as shown in Figure 28, first at a right angle four times, then obliquely, in 32 layers. Cut the top of the resulting triangle by 2 mm. Trim the opposite sharp corner as well. When you unfold the sheet of paper, you will get a round dome blank with a central hole and jagged, rounded edges. Fold the workpiece with an accordion as follows: lay the ribs along the folds, alternately in and out. Cut eight strong threads, each 600 mm long.

parachute models

Fold them together and tie them in the middle to a wire ring with a diameter of 6-7 mm. Cut a hole on a sheet of plywood into which to thread the ring. Secure it with a stick or match, on the reverse side. Lay the dome on plywood, thread the slings into its hole. Lay the slings at an equal distance from each other in every fourth fold and press down with weights. Raise each line in turn, coat with glue, and then lay in place, gluing to the dome. Tie the free ends of the glued slings in a knot. Make a self-timer hook out of wire or a paper clip. Tie an elastic band about 120 mm long to it. Cut out of soft tin or flatten out of a piece of lead a plate measuring 18x22 mm. Lay the tied ends of the slings on one side of it, and on the other, a hook with rubber so that the hook comes out, and secure it all with a strip, squeezing it with pliers or flattening it with a hammer.

Take the folded parachute model by the top with your left hand, and hook the self-release hook on the line ring with your right hand and stretch the rubber about twice. With a slight push, release the canopy up and immediately release the rubber. Your model will take off smoothly, open the canopy and begin a smooth descent.

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