Ok....all your talk about the rotax has me convinced to change out my engine...why?...because I can!
so we will see how the performance changes
I bought my Kitfox IV speedster with the EA81 subaru in it 5 years ago and it is a great running engine but everyone tells me it is to heavy and that is why my performance is so poor. I didn't know any better. Have had a great time with it so far, it climbs great and gets off the ground fast but the top cruise always bugged me because you guys keep saying that you are getting upwards of 110-120 mph cruise. My empty weight is 750 lbs and cruise is 85 mph with fuel burn at 4.5 gal/hr....warp drive ground adjustable prop. Tryed all differant settings on prop with out much change of cruise. So this will be a real life test with the same aircraft.
old engine EA81 Subaru 113 hp on the dyno, warp drive prop
new engine 912 S 100 hp, IVO medium inflight adjustable
Mr Moderator (Steve)
I really hope you are right in your claims
expensive lesson other wise.
but someone has to take one for the team.......LOL