Results from all user's collections (618 out of ~618)
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dlb 01 06 12
Bookmarked 697 weeks ago
on this last flight of the test-bed before rework the favorable downwash of ducted fans is clearly visible dust and debris are pushed away from the pilot even while flying close to the ground the ducts prevent tip vortices from forming and isolate the fans from the external flow field the latter quality permits unperturbed flight around obstacles and when transitioning indoorsin contrast the recirculating flow of open rotors has earned it a name and the bane of pilots: quothelicopter brownoutquot in the desert and quothelicopter whiteoutquot in snow
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111201
Bookmarked 735 weeks ago
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111010
Bookmarked 743 weeks ago
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