Originally Posted by Crackskull
<snip> "First the motor ejects leaving a large hole in the wood the motor was attached to"
Do you strengthen up your motor box and firewall before the initial flights? I know even on my 3dhs planes that I go over every joint with thin ca. I can't imagine how the x-mount on these motors would rip a hole right in the front of the motor box. The only cases I've seen before have been where the glue joints failed and the motor box, etc.. started to pull away. Do you have any pictures of the gp firewalls in this condition? I'm very curious to see how it looks for possible strengthening purposes.