Sherpa: RC heli that’s full of hot air (really!)
On display at this year’s Paris Air Show, the ultralight Sherpa by Belgian startup Sagita aims to make the helicopter simpler, more efficient, more reliable and more affordable. The helicopter’s contra-rotating rotors are directly driven by turbines that are themselves powered by hot air and fumes from the helicopter’s powerplant. Sagita claims that this makes [...]





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