If you can’t make it to Chuck to turn the light bulb and no ladder or chair will help you simple device from a dense paper and two rubber bands.
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AEROBATICS “FLYING WING”
By the mid 30-ies of the aircraft type "flying wing" was quite true to their name — they were flying. In our country, in Germany, England, Switzerland, designers and innovators to pilots...
Pumps water by day, guards the house at night
The automation device I designed is intended for farmers and owners of dachas with an autonomous water supply system whose key elements are a water source (river, lake, well or borehole),...
