About 5 minutes of flying my AT Corsair after upgrading the motor to a Himax 2025-4200 inrunner. Notice how I nearly crash on launch! I was recently having difficulties with the prop flying off the shaft, so I gave it a little test at full throttle just before launch. It was pulling so hard that I just gave it a toss, but the plane pulled hard toward the ground as soon as it left my hand. I pulled it out with just inches to spare! Whew!!! Next time, half throttle to launch.