It is simply too heavy for the front end on the yYnergy. Will it work? Yes. However, it will not be good for you will need to place lots of weight on the tail and the airplane will lose it's great slow flying capabilities. The 110 is making the same power as the 120NC and about 95% the power of the 120FZ. It yanks the Syn90 around like a yo-yo and is an awesome motor once broken in and final tuned.

For the 120, the Goldberg Ultimate is a great airplane...just an idea. Of course, the 110 is even better because the power to weight ration goes up when saving 10% weight. The 120 is almost a redundency...almost, but not quite. It still has it's place for pattern airplanes in the 72" catagory.

Mark