Yak 11 Czech Mate | Air race, Aviation history, The art of flight
Yak11 Reno Race Czech Mate. Display di Giorgio Loda presso il campo volo di Lestans / GAL 2008 - YouTube
Sherman Smoot 'Czech Mate' Yakovlev Yak-11 Crashes Shortly After Takeoff On Engine Failure Near Minter Field Airport. One Dead : r/aircrashinvestigation
Sherman Smoot, Czech Mate Lost in Test Flight Crash - KITPLANES