Fin Patterns for Model Rockets

"Now what we're going to do, is we're going to do fin pattern cut out and placement. Fins have to be put around the body tube evenly spaced around a circle. To do that the instructions come with a fin pattern cut out template. Now what you do is you cut just like you did for the shock cord mount assembly. You cut out the fin pattern template. The fin pattern template, as you may be able to tell from my moving it around, is has things like a launch lug. We'll go into launch lug in a minute. It has the fin locations. This piece of paper that I'm cutting out will be put around the body tube and we'll mark the body tube with these locations with the pen. The way you do that is you take the body tube, you take the fin pattern cut out and you overlap. There's an overlapping section on the fin pattern cut out where you overlap. You can tape this. I usually just hold it because I have been doing this for a while. The thing that says match lines, so you match the lines up. I have cut it out great. You mark the body tube at the fin locations."