The Yak 55/110 flown by Jeff Boerboon (UND) with a GE Lear 24 Jet Engine.

what do you get when you combine two fairly ordinary aerobatic airplanes into one unique airframe and add a jet engine? You get an airplane with two piston engines, one jet engine, two fuselages, two cockpits, two tails, four main landing gear, and approximately two wings.
Built by master aircraft builder Dell Coller and flown by champion aerobatic pilot left Boerboon, (pronounced "bourbon"), the Yak - 110 was created by combining two single-engine Yak - 55 airframes and a Lear 24 jet engine into one very strange looking, but incredibly innovative multi-engine aerobatic aircraft. While the Yak - 110 may look strange, anyone who saw it fly this year at EAA AirVenture, or one of the handful of other airshow where it performed, was likely amazed at its incredible performance and innovative aerobatic capabilities. [Program]

Photo by Craig on Sunday, July 21, 2019 at the Fargo AirSho.