There are plenty of threads on launchers, catapults, whatever. Last time I opined on it I upset a man who had spent quite a bit of time on one I reckon. Anyways, if you use the Search function of the forum and limit the search to the combat section, you should have quite a list of threads to thumb through.

On a quick aside though, what are you powering your Mustang with? I've seen plenty of these now with 25's in the nose and the handlaunch is quite easy. With a 15 in the nose you will have to mind your maners and a catapult will probably be the best option. However, you'll have to consider how much fun it will be carting, setting up and walking to your catapult everytime you want to fly your 'Stang. If you have a 25 in the front, get some help launching for the initial flights and once your comfortable you'll find a simple underhand launch much more enjoyable.

Enlighten us, what is your motor of choice?