RE: RCAero JC Engines & YDA Engines
In the end it boils down to weight IMHO not just size. The Yak is in a totally different class. An no way will the 112 do it justice. The same as the AW Extra 300 with 106" that I have. I have seen videos of it being flown with a 85cc engine and it dragged it around like a rag doll. In the same respect the airframe had been lightened a bit. The same way a 100cc class engine will not fly a 37.5% Yak at 36 to 38 pounds. The Pilot Extra may look like a bigger plane but in the end it is still a 100cc class airframe.
Where the problem lies is the statement gives a person the impression that the 112 would be good for flying a 37.5% airframe and it wouldn't unless some drastic lightening was done to it. No one is knocking the engine and how it flys a plane.