The Falconar SAL Mustang, also called the 2/3 Mustang and the SAL P-51D Mustang is a Canadian amateur-built aircraft, produced by Falconar Avia and introduced in 1969. The aircraft is a ​2⁄3 scale replica of the North American P-51 Mustang and is supplied as plans for amateur construction

The SAL Mustang features a cantilever low-wing, a single-seat, or optionally a two-seats-in-tandem, enclosed cockpit under a bubble canopy, retractable conventional landing gear, including a manually retractable tailwheel and a single engine in tractor configuration

The aircraft is made from wood covered with fibreglass cloth and doped aircraft fabric. Some parts, like the belly air scoop are made from fibreglass. Its 24.8 ft (7.6 m) span wing has an area of 110 sq ft (10 m2) and mounts flaps that may be electrically or manually operated. The cockpit is 24 in (61 cm) wide and the bubble canopy is jettisonable. The aircraft's recommended engine power range is 200 to 350 hp (149 to 261 kW).

The paper plans supplied total an area of 450 sq ft (42 m2), weigh 13 lb (5.9 kg) and include a construction manual. An alternative set of plans allows constructing a tandem two-seat version. The plans are very detailed and complete and one builder rated them as "the best I have seen on any homebuilt airplane"