Irvine 0.72 would not be enough engine to make the plane perform well. It would get off the ground however actual hovering 3D manuvers would be lacking. It would be a good choice for the new smaller UCD however. Check out
http://www2.towerhobbies.com/cgi-bin...?&I=LXDUL8&P=7
They recommend up to a 70 4S
EXCAP232