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How Igor Sikorsky invented the helicopter

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How Igor Sikorsky invented the helicopter

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The helicopter was invented by Igor Sikorsky. There wasn't enough info so exactly when the helicopter was invented is unknown. The helicopter as invented some years before World War 2 started. Igor invented the first practical helicopter, the VS-300. Sikorsky piloted the VS-300 in Stratford, Connecticut and flew in the helicopter for a few seconds. There were other inventions before the VS-300 that would've been considered to be a helicopter like the Focke-Wulf FW 61.

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Superglue was invented by Harry Coover in 1942. Harry invented superglue when he noticed how other adhesives that had been made at that time were way too sticky and messy. Everything was sticking to everything. So in result, Harry made the Eastman #910. With just a drop of water, the superglue will activate and be more effective.

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Skip to O:25 seconds in the video.

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Radar was made in 1935 by a British physicist called Sir Robert Watson-Watt.
Radar works when an invisible beam of microwaves is shot outwards and if something crosses its path then some of the microwave energy will bounce back to the source. The time the microwaves take to get back to the source tells the distance away from the  source and the angle of the microwaves as they return to their source tells the altitude of the object tracked. Before the thought of inventing radar, Sir Robert Watson-Watt was told to try to make a 'death ray' to shoot down enemy planes, but Watson instead took those ideas and used them to make a radar system to track down enemy aircraft