INSANE flight time from Kopis 1 racing drone

INSANE flight time from Kopis 1 racing drone
One of the first things I noticed about the Holybro Kopis 1 racing drone was the very low current draw when hovering — so I decided to see just how long it would …

JJ R/C – H22 (3D) – Review and Flight
Link to purchase from Banggood.com: RTF ($20) …