Mustang Aeronautics Mustang II

The Mustang Aeronautics Mustang II is a two-seat aerobatic sports airplane developed and marketed in the United States for homebuilding. == Design and development == Robert Bushby acquired the rights to the Long Midget Mustang in 1959 and four years later began development of a two-seat, side-by-side version.

Source: Wikipedia — Mustang Aeronautics Mustang II (CC BY-SA 4.0)