I had an MVVS 1.60 Gasser on a H9 Cap weighed about 12.4 pounds. It will do a lot of 3D stuff, but nothing that involves a lot of verrtical or hovering. This engine and the RCS 1.40 probably needs about a 10 pound plane tops, to be fully 3D. The big problem for .90 to 1.20 size gas engine plane combos is finding a light enough plane that is big enough to handle the engine mounting. The good thing about the RCS/MVVS engines is that they will basically go in a .90 or small 1.20 size plane were other gassers will not.

At the time I had the 1.60 Gasser in the Cap I also had the same plane with a Saito 1.80 in it. there was no comparison between the two.