Sikorsky Aircraft showed off its new S-97 Raider late last week. The new light-attack helicopter uses a strange "coaxial design." What that means is, the top of the chopper has two counter ...
MOSCOW, May 16. /TASS/. The Kamov design bureau is developing a new coaxial helicopter for defense missions to fly at a speed of over 500 km/hr, Director of the Aviation Industry Department at ...
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