So a 25% Cub with a G-20 or G-26 is no good? I sure see a lot of them and they are wonderful flying airplanes. I plan on getting one myself this spring.

What about my 27% Christen Eagle that the manufacturer recommends a 40cc-50cc gas engine for?

A fellow club members 25% Yak-54 that tears up the sky and is a 3D monster with a 50cc?

A 27% Edge-540 with a G-45?

There are actually some even smaller planes that work well with small gas engines. Some examples are scale biplanes like the GP Stearman and P-6 hawk. Both require a lot of added weight to the nose when using a glow engine. The weight of the gas engine takes care of that balance problem and works well. Another example would be a warbird with a big round cowl. I've seen G-20's on H-9 corsairs and P-47's and they balance & fly great. These are more advanced planes of course with higher wing loading than something like the Tiger-60. It's not something someone would want to take on unless they were ready to move on to that type of plane.

I've seen G-20's on .90-1.20 size aerobatic and 3D planes too.

I'm sure there are others out there as well. What your saying about gas engines is somewhat true but not entirely. There are applications on smaller planes where it can work very well.

Millertym200's Tiger-60 wouldn't work too well of course.