try pulling your arm as far up as you can use it like a sling shot works for me ........and try like coking your risk .....as you make contact

increase your upper body weight by bending backwards at a small angle then jump using your right leg and then as you smash pick the shuttle cock as high as possible. you can either use your arm, that is form your elbow to your wrist, to smash or you can use your whole hand then after smashing let the hand land on your let side below your waist.