SB-1 Defiant Readies for Third Flight, V-280 Continues Expanding Flight Envelope

摘要

NASHVILLE — The Boeing [BA]-Sikorsky built SB-1 Defiant technology demonstrator is set toundertake its third flight in the next 10 days to accomplish frequency sweeps and to checkseveral other areas, including the aircraft's active vibration control system and its hover out ofground effects profile."The plan is we'll have another flight in a week and a half," Bill Fell, the Sikorsky experimentaltest pilot for the SB-1, said Apr. 15 during a briefing at the Army Aviation Association ofAmerica's annual conference here. Sikorsky is a business unit of Lockheed Martin [LMT].