I have the Rascal 40 flying with an Irvine 46. The plane required one click of right and one of down trim for hands off at 100% power. This thing is fast and flies very well at half throttle. Will do great knife edge and inverted with very little trim held in. The rudder is effective and seems to induce a bit of roll coupling. I set the Ailerons with differential before the first flight. Axial rolls are very smooth with a slight altitude loss by the third roll. My son (age 34) loves flying it flat out at low altitude. His opinion is the Irvine does not have as much power of the OS 46FX. He suggested changing out the engine over the winter. The idea of squeezing another engine in that tight nose does not thrill me.

All in all, IMHO it is an excellent ARF that is a enjoyable to fly.

Tom