Jag flyttade nyligen min quadcopter och det började gå ur kontroll. Det berodde på att jag flyttade den under en takfläkt som fungerade som en mini-nedbrott som sköt den lilla quad mot marken.
Så har det någonsin rapporterats om en helikopter som oavsiktligt flyger till en nedbrott?
Ja, det skulle vara fantastiskt om det aldrig hade hänt. Eftersom "rapporter" endast krävs vid olyckor är här utdrag ur tre NTSB-sammanfattningar:
During descent for an off-airport pinnacle landing, the helicopter encountered a downdraft about 75 to 100 feet above ground level (agl), and the pilot receiving instruction increased collective input. The flight instructor advised the pilot receiving instruction to be less aggressive using the collective as the flight continued to the landing area. As the helicopter descended through about 10 to 25 feet agl, it encountered a second downdraft, and the pilot receiving instruction increased collective again, which was followed by a decrease in rotor rpm.
During the approach to the 5,657 foot level site, the pilot said he encountered a downdraft as the helicopter approached the site, and the helicopter descended below his anticipated approach path. He initiated a go-around, but the helicopter continued to descend, and landed hard, about 150 feet short and down slope of his intended touchdown point.
As he flew the helicopter out of the leeward side of the peak, he encountered a downdraft. He maneuvered the helicopter toward a wide open valley that descended about 5,000 feet below. The downdraft pushed the helicopter into the face of the mountain, despite the pilot's application of full collective and descending flight into the valley.
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