This is a video of Youtuber ProjectAir constructing and testing what he believes to be the world’s largest RC rocket plane, a radio controlled balsa glider that gets an initial blast of propulsion from a giant model rocket engine. It works surprisingly well, and the first test flight goes off without a hitch instead of ending up on a neighbor’s roof like every model plane I’ve ever flown. It doesn’t matter if my nearest neighbor lives a mile away, my plane will find their roof. Same goes for baseballs and their windows.

Skip to 15:45 for launch.