hey, i have a quick question, that will probably have a long answer.
I am scaling up a stubby from rcm plans to about 130% the original size. Instead of a "flat bottom" wing, i want a symmetrical wing. I found an airfoil with a google search, and the one i picked said ultrasport 1000. I printed a pic of it off, and scaled it up so i would get a chord of 15.25" and ended up with 3" thickness. The wingspan will be 80". The problem is, if any. is that the airfoil looks really thick. Some reason just doesnt look "right" . I read on a sight that ideal thickness should be 15-18%. the airfoil i have is 19%. i probably shouldnt be sweating about this, but what type of flight characteristics could i expect? (i figure lots of drag, slow speed) I kinda want a plane that can be flown on the edge of a stall, but also able to do a good clip if i want to. I expect this plane to weigh about 12 lbs and it has a wing area of about 1200 sq" I intend on using a 25cc gas engine.
any input is greatly appreciated
thanks,
andrew