As is known, one of the main difficulties in the tourist marches and the servicemen forced march is the need for bearing after the arms sufficiently difficult knapsack with the equipment and the provisions.
Having fundamentally changed the construction of knapsack, physiologist chests Rom from the Pennsylvania university knew how to considerably reduce load on the back of porter.
The fact is that with walking the human body moves vverkh-vniz in the amplitude of 5-7 centimeters, and, correspondingly, for it is necessary to raise and to lower its weight and weight of load with each step. The construction of new knapsack is based on the principle of the retention of the height of load during walking - suspended from the elastic ropes, knapsack with each step slides vverkh-vniz according to the guides of metallic frame.
It is reported that the construction decreases the additional vertical load on 86%, and the general savings of energy is approximately 40 W the basic purpose of development - to reduce risk level to suffer injury of muscles and spine.
By the way, nothing interfere withs improving knapsack, after adding the electric generator, a usable portion of the kinetic energy, for example, for the charge of batteries KPK, navigator and other mobile devices, reports iXBT. In general, the project began for this purpose, to order of the administration for sea studies OF THE USA. Control wanted to reduce the weight of the knapsacks of soldiers, after replacing backup batteries shityu "ryukzachnym" generator.
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