Very true about glo engines before the sixty size. You have got to forgive me and the way I put things into words. What I was trying to say is Lou and Larry said they think the 60 size engine is as good as a glo engines can be. There is smaller and bigger engines. They just think the 60 give more and all 2 stroke engines are set up based on the 60 design. These two guys were great. They were on the USAF world wide team. Both were great aircraft and engine designers. Lou in R/C and Larry in free flight. Some of the old timers remember them both. Lou had many pattern ships he kitted. I lost my ENYA 60 they gave me. I lost it in Katrina. It was heavy, strong, and ran just great.
I like 60 size two strokes and do wish there were more 60 size aircraft out there.