won't fly

I converted a speed build kit FT Nutball , into a snowball with the conversion kit. I am using the B Power pack as recommended. The CG balanced, slightly nose heavy. On it's maiden, it scooted across the snow and took off only to roll hard right and dive into the ground several attempts. Can...

Set up an FMS Easy Trainer to replace my Sport Cub S. All control surfaces are responsive and the motor responds to the throttle. When I hand launch with throttle at 50 - 75 %, the plane goes straight down. Everything else I have read says to not launch at full throttle. Any ideas greatly...