The ScaleWings SW51 Mustang, formerly marketed as the FK-Lightplanes FK51 Mustang, is an

Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...

ultralight Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with aile ...

light-sport aircraft A light-sport aircraft (LSA), or light sport aircraft, is a category of small, lightweight aircraft that are simple to fly. LSAs tend to be heavier and more sophisticated than ultralight (aka "microlight") aircraft, but LSA restrictions on weigh ...

and

homebuilt aircraft Homebuilt aircraft, also known as amateur-built aircraft or kit planes, are constructed by persons for whom this is not a professional activity. These aircraft may be constructed from "scratch", from plans, or from assembly kits.Armstrong, Kenn ...

that was designed by ScaleWings of Strasswalchen,

and was initially produced by FK-Lightplanes of

Krosno Krosno (in full ''The Royal Free City of Krosno'', ) is a historical town and Krosno County, county in the Subcarpathian Voivodeship, in southeastern Poland. The estimated population of the town is 47,140 inhabitants as of 2014. The functional ...

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

, who introduced it publicly at the

AERO Friedrichshafen AERO Friedrichshafen is a trade show dedicated to European general aviation. It is held yearly in April on the shores of Lake Constance at the exhibition center of Friedrichshafen, Germany Germany, officially the Federal Republic of Ger ...

show in 2013. After FK-Lightplanes ceased production, the design was built by ScaleWings.Tacke, Willi; Marino Boric; et al: ''World Directory of Light Aviation 2015-16'', page 51. Flying Pages Europe SARL, 2015. The aircraft was first flown in October 2014 and is supplied as a complete ready-to-fly-aircraft or as a kit for amateur construction. The SW51 is a 70% replica of the

North American P-51 Mustang The North American Aviation P-51 Mustang is an American long-range, single-seat fighter and fighter-bomber used during World War II and the Korean War, among other conflicts. The Mustang was designed in 1940 by a team headed by James H. Kin ...

fighter aircraft Fighter aircraft (early on also ''pursuit aircraft'') are military aircraft designed primarily for air-to-air combat. In military conflict, the role of fighter aircraft is to establish air supremacy, air superiority of the battlespace. Domina ...

of the

Second World War World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

Design and development

Similar to the P-51 Mustang that it is based upon, the SW51 features a cantilever

low-wing A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple wings. A monoplane has inherently the highest efficiency and lowest drag of any wing config ...

, a two-seats in

tandem Tandem, or in tandem, is an arrangement in which two or more animals, machines, or people are lined up one behind another, all facing in the same direction. ''Tandem'' can also be used more generally to refer to any group of persons or objects w ...

enclosed cockpit under a

bubble canopy A bubble canopy is an aircraft canopy constructed without bracing, for the purpose of providing a wider unobstructed field of view to the pilot, often providing 360° all-round visibility. The designs of bubble canopies can vary drastically; so ...

, fixed or retractable

conventional landing gear Conventional landing gear, or tailwheel-type landing gear, is an aircraft Landing gear, undercarriage consisting of two main wheels forward of the Center of gravity of an aircraft, center of gravity and a small wheel or skid to support the tail ...

and a single engine in

tractor configuration In aviation, a tractor configuration is a propeller-driven fixed-wing aircraft with its engine mounted with the propeller in front, so that the aircraft is "pulled" through the air. This is the usual configuration; the pusher configuration ...

. The light-sport version for the US market will have fixed landing gear as that category requires. The design's structure is made from

carbon fibre Carbon fiber-reinforced polymers (American English), carbon-fibre-reinforced polymers ( Commonwealth English), carbon-fiber-reinforced plastics, carbon-fiber reinforced-thermoplastic (CFRP, CRP, CFRTP), also known as carbon fiber, carbon comp ...

. Its span wing mounts flaps. The Mustang features electro-hydraulic retractable landing gear, hydraulic disc brakes on the main wheels, dual controls and electrically-operated flaps. It also has three-axis

fly-by-wire Fly-by-wire (FBW) is a system that replaces the conventional aircraft flight control system#Hydro-mechanical, manual flight controls of an aircraft with an electronic interface. The movements of flight controls are converted to electronic sig ...

trim tab Trim tabs are small surfaces connected to the trailing edge of a larger Flight control surfaces, control surface on a boat or aircraft, used to control the trim of the controls, i.e. to counteract hydro- or aerodynamic forces and stabilise the ...

s, electrically-adjustable

rudder A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, airship, or other vehicle that moves through a fluid medium (usually air or water). On an airplane, the rudder is used primarily to counter adverse yaw ...

pedals, two internally-mounted

Kevlar Kevlar (para-aramid) is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, the high-strength material was first used commercially in the early 1970s as ...

fuel tanks and detachable outer wing panels. The design includes two baggage compartments, one in front of the firewall and one behind the cockpit. The manufacturer has made the aircraft as similar to the original as possible, down to the simulated metal finish, rivets and other details. It also includes a 2000 watt sound system that provides a

Rolls-Royce Merlin The Rolls-Royce Merlin is a British Coolant#Liquids, liquid-cooled V12 engine, V-12 Reciprocating engine, piston aero engine of 27-litre (1,650 cu in) Engine displacement, capacity. Rolls-Royce Limited, Rolls-Royce designed the engine an ...

engine sound and a smoke generator for start-up smoke simulation. Unlike the P-51 Mustang, the SW51's

can slide aft and then is hinged to the right for egress. The initial FK-Lightplanes model was a European microlight version. When production passed to ScaleWings they developed new models of the design, including a light-sport model, a homebuilt model that is also available ready-to-fly for the US ''Experimental-Exhibition'' category and a heavier weight ultralight version.

Operational history

In a 2023 review for AVweb, ''Kitplanes'' Editor-at-Large, Paul Dye wrote, "What makes this latest entry in the Mustang look-alike contest special? Its carbon-fiber construction is a place to start. Making composite structural parts in female molds allows a surface finish that simulates every rivet and screw in the original Mustang. Painted properly, it is hard to tell that you aren’t looking at an aluminum airplane unless you knock on the structure and hear the difference. Remarkably, the molds for the SW-51 have every surface feature made into the mold individually with meticulous care, or so we’re told. When you look at the finished product, it shows flush rivets and screws that appear to have typical paint buildup in the dimples and in the heads of the Phillips screws. The simulation is remarkable. Even the rudder looks as if it is fabric covered, with rib stitching and pinked tapes—the whole nine yards. Just like a real Mustang."

Variants

;FK51 :Initial model produced by FK-Lightplanes for the European microlight category with a typical empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload for pilot, passenger and baggage is . The acceptable power range is and the standard engines used are the Rotax 912S or 912iS and the

turbocharged In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into the ...

Rotax 914 The Rotax 914 is a turbo-charged, four-stroke, four-cylinder, horizontally opposed aircraft engine with air-cooled cylinders and water-cooled cylinder heads. It is designed and built by the Austrian company BRP-Powertrain, owned by Bombardier ...

powerplant. ;SW51 Ultralight :A proposed model by ScaleWings for when the European microlight category has its gross weight raised to to match the US light-sport rules. It will have a typical empty weight of and a gross weight of . The maximum power will be . ;SW51 S-LSA :A model by ScaleWings for the US light-sport rules, with fixed landing gear and a fixed pitch propeller. It has a typical empty weight of and a gross weight of . The maximum power is . ;SW51 Experimental :A model by ScaleWings for US ''Experimental Amateur-built'' or ''Experimental-Exhibition'' rules as a quick-build kit or fully assembled. It has a typical empty weight of , depending on the engine installed and a gross weight of . The maximum power is .

Specifications (FK51 ultralight)

References

External links

*
FK-Lightplanes official website archivesFirst flight video
{{B&F aircraft SW51 SW51 2010s Austrian sport aircraft 2010s Austrian ultralight aircraft Single-engined tractor aircraft Low-wing aircraft Replicas of North American P-51 Mustangs Aerobatic aircraft Aircraft first flown in 2014 Aircraft with retractable conventional landing gear Single-engined piston aircraft