Coaxial Cruising

Pretty cool video here of Sikorsky's latest whirlybird, the X2 demonstrator, which has hit 262 knots, or 300 miles an hour, a record for a helo. Nice acceleration too. The coaxial rotors spin in opposite directions to keep the aircraft from stalling at high speeds. It's no easy feat, as this articl...

airspacemag.com
Pretty cool video here of Sikorsky's latest whirlybird, the X2 demonstrator, which has hit 262 knots, or 300 miles an hour, a record for a helo. Nice acceleration too. The coaxial rotors spin in opposite directions to keep the aircraft from stalling at high speeds. It's no easy feat, as this article describes.

http://www.youtube.com/watch?v=gK7ktLXhq88
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