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The Stemme S12 is a German
high-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 ...
, two-seat
motor glider A motor glider is a fixed-wing aircraft that can be flown with or without engine power. The FAI Gliding Commission Sporting Code definition is: a fixed-wing aerodyne equipped with a means of propulsion (MoP), capable of sustained soaring flig ...
produced by
Stemme Stemme AG is a German glider manufacturer. Aircraft production is complemented by service, maintenance and repair of their sports and personal aircraft. Starting in 2014 many Stemme glider structural components were made under contract by Remos ...
of
Strausberg Strausberg () is a Town#Germany, town in Brandenburg, in eastern Germany, located east of Berlin. With a population of about 27,000 it is the largest town in the district of Märkisch-Oderland. History Strausberg was founded ''circa'' 1240, and ...
. It was introduced at
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 ...
in April 2015, shortly after its first flight.


Design and development

Based in the
Stemme S10 The Stemme S10 is a self-launching sailplane produced by Stemme AG in Strausberg (Germany) since the 1980s. The engine is mounted amidships and it features an unusual folding propeller which is stowed inside the aircraft's nose-cone when the e ...
, the Stemme S12 features a cantilever wing, a
T-tail A T-tail is an empennage wikt:configuration, configuration in which the tailplane of an aircraft is mounted to the top of the vertical stabilizer, fin. The arrangement looks like the capital letter T, hence the name. The T-tail differs fr ...
, a two-seats-in-
side-by-side configuration 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 ...
and a single engine with a retractable propeller. The aircraft is made from
composite material A composite or composite material (also composition material) is a material which is produced from two or more constituent materials. These constituent materials have notably dissimilar chemical or physical properties and are merged to create a ...
. Its span wing employs
winglets Wingtip devices are intended to improve the efficiency of fixed-wing aircraft by reducing drag. Although there are several types of wing tip devices which function in different manners, their intended effect is always to reduce an aircraft ...
. The mid-fuselage-mounted engine is the Rotax 914 F2/S1
four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...
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 ...
powerplant driving a retractable, folding, variable-pitch propeller. Its maximum
glide ratio In aerodynamics, the lift-to-drag ratio (or L/D ratio) is the lift generated by an aerodynamic body such as an aerofoil or aircraft, divided by the aerodynamic drag caused by moving through air. It describes the aerodynamic efficiency under give ...
is 53:1. The $8 million Dzyne Unmanned Long-Endurance Tactical Reconnaissance Aircraft (ULTRA) is an
uncrewed An uncrewed vehicle or unmanned vehicle is a vehicle without a person on board. Uncrewed vehicles can either be under telerobotic control—remote controlled or remote guided vehicles—or they can be autonomously controlled—autonomous vehicl ...
derivative deployed as part of an affordable ultra-long endurance ISR demonstration, capable of flights up to 80 hours.


Specifications (S12)


See also

*
List of gliders This is a list of gliders/sailplanes of the world, (this reference lists all gliders with references, where available) Note: Any aircraft can glide for a short time, but gliders are designed to glide for longer. By nationality * List of Ameri ...


References


External links

* {{Stemme aircraft 2010s German sailplanes Single-engined tractor aircraft High-wing aircraft Motor gliders Glider aircraft T-tail aircraft Mid-engined aircraft Aircraft first flown in 2015