I just made a 48" wingspan delta wing foamy, I have an OS26FS I have mounted on it, I don't know what size prop will work best in this application and I need HELP! overall wt. with all gear installed is 3 1/2 lbs. I have posted this same inquiry in several forums with absolutely NO response, someone out there has to be able to help out of the masses of people who use this site .thanx in advance ericthetree.