Hey I have the same problem with a new Weston Cougar 2000 and my old beat up Magic. I'm going to tiewrap a dumbell on the rear of both of them until they snap like a frozen twig in a tornado. Thanks
Mups is on track, for sure. If your's ain't
snapping and spinning like a raped ape , then CG is probably the issue. I fly my magic with a
bunch of garbage servos , one $30 Hitec 605 on the rudder and a
really crappy old .46 two stroke . I even used the
junky pull-pull hardware that it came with, friction and all.
However, I DO have a dumbell under the tail and that made a world of difference. OK, not a dumbell maybe, but a solid 3oz or more of lead laying right next to the tailskid.
I have been diggin' this plane