Subscribe | UPI Odd Newsletter Subscribe STOCKHOLM, Sweden, July 22 (UPI) -- A Swedish engineer shared video of his successful test flight in a homemade "multicopter" powerful enough to lift him several feet off the ground. Inventor Axel Borg posted a video to YouTube showing his test flight in the multicopter, which he has been building for more than a year and documenting his progress on his amazingdiyprojects channel. Advertisement