Another test flight. Another day of hard lessons. This time, the helicopter took the 15-foot plane up even higher and flew it around, tethered by a cable, for about 10 minutes before releasing it. And it actually flew pretty well. Then it had a hard landing. But we’re chalking that up to a tangled drag chute during the release from the cable. We now know two things for sure: 1) The plane needs more elevation and a chute that won’t get caught again. 2) Doing something no one’s ever done before is hard. But man, it’s gonna be sweet to see that giant paper plane fly.