RE: Out of trim trainer
On high rates it seems that it will loop in its own length. Roll rate perhaps 900 degrees per second. I set mine up for more pattern flying. 360 degrees per second and a 15+ second 1/2 elevator loop. Well balanced, good 1/3 - 1/2 throttle performance with an OS 46 AX and APC 12.25x3.75 prop. Then there's the guy who stuffs a Saito 115 on the firewall - 3 step take off to full unlimited vertical ...
Only difficulty has been a Tx / Rx mis-communication that resulted in a full throttle down line from 100 feet. Buried in hard pan well past the firewall. Gives me an excuse for building another.