Honestly, I can see why you would start it. The aviation community is an extremely passionate community and I'm willing to bet some people would like to show that passion off with their clothes. I wish I could see the website though, it keeps sending an error everytime I click on it. Try it out but maybe think about DTG printing as this allows you to print shirts on demand rather than screen printing which requires you to place a bulk order to get the unit price down. With DTG printing it's also easier to manage inventory as you won't just have a ****load of shirts lying around the house that may or may not sell. Look into that and let us know how it goes!