Even ancient people engaged in hunting, found that it is much easier to carry the prey, not on his back, and putting her on some sort of sled. Later, it became clear that if the logs to use as rollers to move heavier loads.
Disc wheel, attached to the platform by a simple axis – a direct descendant of the rink. For the first time the wheel was used in Mesopotamia about 5,000 years ago. Vehicles with a bullish thrust gradually improved and spread to the Mediterranean, Europe and China. The Romans learned how to make durable carts; their excellent roads, established a quick message horse sleds. It was an important factor in governing the vast Empire.
Ventilate the apartment – not a problem if the room it is located on both sides of the house. But if all the Windows in the apartment face one direction, updating of the air in it is very slow.
In the distant 1960-m to year, in accordance with the doctrine of the Association of school and life, our 10-grade “B” in full force was aimed at a large aviation plant with a mysterious name “Enterprise p/2402” where we had to master one of the working professions.
Many owners of motorcycles seek how to more effectively use their existing vehicle. In the construction of various buildings, the improvement of the gardens and doing other chores there is a need to move various loads over short distances. In some cases, to cope with this task, under the power of a motorcycle with a lateral trailer. It can be used to significantly expand the range of appropriate jobs: to transport sand, gravel, lumber, hay, household waste, etc., the Optimal solution can be considered the simplest uniaxial trailer structure. The magazine repeatedly cited the description of similar devices. A handmade had the original design solution.
Not to dwell on his haunches (if you planted seedlings in the garden or in the greenhouse, laid out by a car repair) — for any “knee” work your good helper will be here is the seat box.