Sukhoi Su-26

The Sukhoi Su-26 is a single-seater aerobatic aircraft from the former Soviet Union, powered by a single radial reciprocating engine. The Su-26 has mid-mounted straight wings and fixed landing gear, the main gear mounted on a solid titanium arc. The Su-26 made its first flight in June 1984, the original four having a two-bladed propeller. The production switched to the Su-26M, with refined tail surfaces and a German-made MTV-9 3-blade composite propeller. Further refinements were made, and the model won both the men's and women's team prizes at the 1986 World Aerobatics Championships. The modified Su-26M3 with the new M9F 320 kW (430 hp) engine dominated the 2003 and 2005 Aerobatic World Championships as well as the 2004 European Championships. The Su-26 has fully metric instruments, except for the altimeter.

Summary from Wikipedia, photo via Wikimedia Commons, licensed under CC BY-SA.