'Key Milestone' For The Aircraft System, Program Leader Says
Sikorsky has begun full system testing of the U.S. Marine Corps' CH-53K heavy lift helicopter with all seven main rotor blades and four tail rotor blades attached for the first time to a non-flying prototype called the Ground Test Vehicle (GTV). Powered "Light-Off" with rotor blades spinning follows a "Bare Head" (without blades) test phase of the GTV aircraft's systems.
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