Similar to This
DARPA honors drone teams for light copters that carry heavy loads
DARPA honors drone teams for light copters that carry heavy loads: DARPA's Lift Challenge sought VTOL drones under 55 lbs to lift over 110 lbs ...
newatlas.com/drones/darpa-drone-lift-challenge/
DARPA Lift Challenge ends with a surprisingly old-fashioned winner
DARPA Lift Challenge ends with a surprisingly old-fashioned winner: A team of engineers have proved that a helicopter design older than most of their ...
defence-blog.com/darpa-lift-challenge-ends-with-a-surprisingly-old-fashioned-winner/