Photograph from the FDCL announcement: Quadrotor Payload Transportation Demonstrated in Flight
From FDCL’s March 31, 2020 announcement.

Beomyeol Yu and Kanishke Gamagedara demonstrated a quadrotor transporting a suspended payload. FDCL shared their video, “Geometric Control and Experimental Validation for a Quadrotor UAV Transporting a Payload.”

The experiment connects geometric control methods with the coupled motion of an aerial vehicle and its load. See the original announcement for the video.

Beomyeol Yu, one of the researchers who conducted the payload experiment.
Beomyeol Yu, one of the researchers who conducted the payload experiment.
Kanishke Gamagedara, who also conducted the payload experiment.
Kanishke Gamagedara, who also conducted the payload experiment.

Original FDCL announcement — March 31, 2020