RE: .049 sailplane set up
18 years ago,I built a 2x4 with a nose mounted TD(.049) diesel. Used a 2 oz. tank. Flew well.
Changed to an OS 10 FSR with an 8x4 MA prop. Added light weight 2" wheels & LG to the firewall. Flew much better.
Touch and go,loops,rolls,etc. Note(change to full span instead of half span elevator)(add throttle servo)