The AA I took back really spiraled left and no amount of trimming with tx, rudder or engine positions made it fly as strait as my original AA . I say it was caused by the motors not running the same rpm because when I would throttle down the left motor would stop turning a second before the right motor showing that the right was turning faster . You can compinsate somewhat by motor position but the best thing to do is take it back and get one that has motors that turn at the same rpm . Skypix your AA turning left may have been caused by motor position but some AA's turning sharply left is caused by motors not running at the same rpm .


Skypix said >> I think you're right about the turn left thing. Since I've reattached my engines (after every hard nose in or tree or house beak) I have to retrim...but my strong left has now gone away as I'm better at judging the engine attach angles.