Wow, what a website!
Those enterprising Poles have done it again, constructed a rather exceptional aircraft. We know them well for gliders; I flew a Jantar III in the Soviet Union. (1989, Women's European Championships). The Junior single seat glider is sturdy, designed for landing on horrible fields. The Puchaz, with that enormous tail, does exactly what it says on the tin, flies right side up or upside down as required. And will spin in a heartbeat if mishandled.