Never empty on the Playground, even the most simple swing-weights. Like the guys, strongly rebounding yogis, to fly up. But the landing is often less than pleasant: a little miscalculated the forces of the child, and should be hard hitting the edge of the Board on the ground. Well, tuck under his leg, can not do without tears. To avoid this, cut in half served the tire and zagubica in the ground, as shown in the figure.
Recommend to read
STAR — CONDUCTOR
Amateur Designers often used in the transmissions of their cars, the chain transmission. And sometimes faced here what problem: for the calculated gear ratio chain couples find it...
THE REBIRTH OF THE “HARD” ROCKET PLANE
First the model of similar schemes appeared in the all-Union competition in 1982. With them were athletes from Moscow. But at the time of competition for soft raketoplana the type of...
