The glass their hands. Scientists are constantly talking about global warming, but nature in winter so additional “tightening” frosts and blizzards, which casts doubt on this assumption. In those days, in the homes included all the available heating devices. It isn’t getting warmer. Then you have to think about how to provide a comfortable temperature in the house is in any cold weather.Experts say that about half of the heat from the premises goes through the Windows. And this despite the fact that the window area does not exceed one tenth of the area of all other enclosing structures (floor, ceiling, walls).
WINDOWS FROM EUROPE
In the beginning 1960-ies to the leadership of the British Navy faced the problem of replacement fighter aircraft “sea vixen” (Sea Vixen) more modern machine. First, the sailors wanted to buy from your company “Hawker Siddle” (Hawker Siddeley) supersonic aircraft vertical takeoff R. 1154. But because of its high cost and the inevitability of problems in development, they turned their attention to the American Phantom, which was relatively cheaper and did not require a large investment of time to create.
When winter comes and the snow is “fluffy blanket” covers the ground in many areas, the only vehicle able to overcome it “fluffy blanket”, it becomes tracked all-terrain vehicle or, more commonly, a tractor with a sled-scraper. Of course, you can buy a Japanese ski-goose-nicou Yamaha (though it is worth more than another car) or buy now rare a cheap domestic “Buran”. However, always need such a powerful machine?
Oven is better to put. Built by the owner, it will serve him throughout life; only once in 7-8 years, it will have to be clean (soot typed 2-3 buckets, because the rate of increase of its thickness on the surface of the chimney up to 2 cm per year). So, oven-shield (Fig. 1). It has five wells and five turns of smoke. More of them should not do: be a bad pull, because the pipe needs to heat up — then it works like a hood (if for this purpose I had to set the blower motor, the power it needs to achieve 0.2 kW). Three turns too bad — large heat loss.
The child imitates adults, and when the whole family sits at the table, he also wants to sit at a large, not for the child table. And then the mother to feed him. There is a special malyshovogo chairs on high legs, pulls to a regular dining table. But the kid quickly grows out of them. However, you can make a simple but versatile highchair that will and outdoor, and can be used for feeding of the child at the adult table.
Sail is one of the oldest inventions of mankind, who played a revolutionary role in the development of navigation. The Millennium operation has made sailing propulsion is very perfect, and it seemed that his aerodynamic abilities reached its practical and theoretical limit. A new stage of development of this propulsion system uses the wind power, was the creation of a rigid sail with double-sided sheathing.