Parachutes : How do people learn to fly

Grey-haired, vigorous, despite the sixty years, Elena

Though the density of ice is less than water density and consequently ice is formed and floats on a surface, however it can sometimes arise on different depths, including at the bottom. German and Russian scientists name its ground ice, and English and American - anchor. When such ice freezes on laying at the bottom of a chain, ropes, anchors, cables and stones, they emerge on a water surface, amazing for observers. This ice is sharply distinct from usual friable structure

So-called В«metabolic waterВ», received in a live organism from disintegration of the fats which are oxidised to carbonic gas and waters (РЎ02-С‚-Рќ20), is extended in fauna more widely, than it would be possible to assume. As it is established, this process occurs both in a hump of camels, and in tails zhirnohvostyh sheep and jerboas, in hypodermic fatty adjournment of gophers, hedgehogs, saksaulnoj sojki, sleepyheads (an animal reminding to fiber), etc.

The lieutenant Dybovsky has invented by then the special adaptation — the synchronizer, allowing to shoot from a machine gun forward while screw blades deviate also bullets fly by, not touching them. However its invention has not been used. But at Germans, Frenchmen and Englishmen synchronizers operated smoothly.

Observing of flights of dragons Nezhdanovsky, studying in a wind tunnel a flow air of plates with various section, or as speak in aircraft, a profile, Zhukovsky has come to very important opening which has stated in 1905 in scientific work В«About the attached whirlwindsВ». For the first time in the world in this work Zhukovsky has deduced the formula of elevating force. After all before many designers of planes built all by eye, relying on scent and experience which quite often brought them. And now elevating force of the future glider or the plane could be calculated to within kg behind a table, with a paper and a pencil in hands!

Two French scientists. bio and the well-known physicist and chemist Zhozef-Lui the Gay-Ljussak too made travel by a balloon. They have risen on height more than seven kilometres, taking with themselves various scientific devices, including a barometre and the thermometer. Scientists were convinced, that with a raising on height air temperature gradually goes down, approximately on 0,65 degrees on each 100 metres of height

So, nine hundred years ago English monk Olivier from Malmsbe-ri has decided to repeat experience and has made to itself wings in the manner of that has made Dedal. Having adhered them for a back and having passed hands in loops, it has jumped off from a high tower. The trustful monk has there and then understood, that the myth about Dedale and Ikare is no more than dream. Wings did not hold