That's a big rip-gluing isn't going to cut it. If you're going to attempt it by yourself, here's my advice. First, get a speedy stitcher and do some practice with it to learn how to use it and how to do a tight "baseball stitch". Then, stitch the gash shut with heavy gauge thread. The stitch job will hold the tube together when under stress and the kind of air pressure cats are designed to handle. Then go ahead and patch it being sure to use a pressure roller to purge out any air pockets and get a good seal. Then, put blocks all around the patch, fill up an 80qt cooler with water and let the weight sit on it for a couple days. For some good pointers on the "baseball stitch" check out an Aire repair video/owner's manuel. Good Luck!