The Mustang Aeronautics Mustang II is a two-seat aerobatic sports airplane developed and marketed in the United States for homebuilding.

[1][2][3] 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.

[5] A single engine in tractor configuration airplane, the Mustang II features cantilever low-wing, two-seats-in-side-by-side configuration enclosed cockpit under a bubble canopy, fixed conventional landing gear, or, optionally, tricycle landing gear.

[2][3] The aircraft is made from riveted sheet aluminum with a rounded turtle deck and flat sides and bottom skins.

[2][7] Standard fuel capacity is 25 US gallons, but optional wet wings increase the fuel capacity to 61 US gallons.