The Yakovlev Yak-141 (NATO reporting name Freestyle), also known as the Yak-41, is a supersonic vertical takeoff/landing (VTOL) fighter aircraft designed by Yakovlev. It did not enter production.
Read more about Yakovlev Yak-141: Design and Development, Operational History, Variants, Operators, Survivors, Specifications (Yak-41)