thanks guys i have a plastic clevis on the engine , the intenna might be the problem i dont know its running over the top of the servos and out the top of the plane behind the wing and then connects to the tail . I dont think its wind ive been flying late in the evening when its calm and when it hits the plane is like trying to ride a bull for about 9 seconds , then it smooths out and will fly right . Its done this a few times when taking off and making a left turn and a few times when doing acrobatics . Should i switch my transmitter to pcm instead of ppm ?