The Cri-Cri is very aerobatic, has a 180Kg gross weight and was designed by Michel Colomban, one of a number of aircraft he is responsible for including the MC100 BanBi, and in collaboration with Mr Robin, for the MCR01.
http://www.cricri.co.uk/cricri_history.htm
It can have, depending on which engines are fitted, very good single engine performance. I have witnessed one doing aerobatics on one engine and it was coping fine. As to the “not a real aircraft engine” most of you have powerplants originally designed as ground power units.
Rod1