I never flew Ultimates 90 powered but I have observed.

I have observed and FLOWN Barons with the 63.

Truly amazing machine - closest IC plane Ive flown to a shockflyer ! at certain attitudes it uses its areas at others it tumbles like a stick plane...

great but on this engine and (eventually the right prop - guess what 14x5N like my 50 !) 30% nitro it was a dancer for the right hands...

For the general pubic looking for a small 140 the like of the ys 110 will be baby making material !

Seriously considering a short run of reserve kits - dont think it will make production.....