Here is a very usefull techniqe that will help you to become a flying ace. First, sit down and shift your view into a third person view of the plane. Then, select the plane tool and position your cursor directly in the center of the screen. Then, hold down the right mouse button and start the plane. Then hold down the left mouse button and fly normaly. The plane will turn towards your view and allow you to make easy turns and tight manuvers.