I've flown one w/ an Evolution 46. It seemed like it needs more omph. For a 2-stroke, it needs at least a good .50+. On the other hand, the Evolution .61 may be too heavy (25.44 oz including muffler). That plane really would benefit from a 4-stroke. A few of my friends have this plane w/ OS .70 4-stroke, and it seems about right. Magnum's new .70 4-stroke would be perfect for a lower cost. .70 4-stroke weighs about 22 oz including muffler. I guess the .61 Evolution is not that much heavier than an OS 70 4-stroke.

A perfect engine for this plane is Saito 82, weighing just 19 oz including muffler, and has the power of 91 4-stroke.