Actually its a Pilatus P-3, Lycoming piston engined trainer. It is the
Swiss equivalent of a T-34, but it was never certified in the US, hence
the Experimental Exhibition categorization. Its built a lot heavier
that a T-34 and they all have a lot less total time than the T-34s do
(they all seem to be between 3000 and 4000 hours TT vs. 10,000 hours on
a lot of theT-34s).

This is the great-grandfather of the current USAF T-6A Texan II. It
evolved from the P-3 to the PC-7 with the addition of the PT-6 engine
and some airframe mods, then to the PC-9 with ejection seats and a
larger turbine, and then to the T-6A with even more power &
modifications for the USAF.

Eric