Learn how to throw a straight right hand correctly and effectively with James Williams Sensei of Nami-Ryu Aiki Heiho.
The straighter and more connected the punch the more effective it is going to be.
Relax when you throw the punch.
Turn the body first. The punch comes after the body has almost run out of rotation.
Think of throwing a baseball really hard.
Get the body moving and then let the punch go.
The punch will be straighter, harder and you will be less exposed when you throw it.