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Schempp-Hirth Quintus
Quintur M
The Open Class Quintur 23 m wingspan is a very thin, high aspect ratio wing, with a maximum of 250 liters of water ballast, allowing for a potential wing loading between 39 and 58 kg/m².
Lange Aviation and Professor Loek Boermans were involved in the conception and design of the wings, with nine exact interacting wing airfoils that provide laminar flow over 95% of the lower and 75% of the upper wing surfaces and are based on a super-elliptical wing geometry. The concept of the outer wing panel with winglets were from Professor Mark Maughmer.
Structural design, ballasting and the patented, extremely light control design were provided by Lange Aviation.
A self-launch optimized fuselage has been designed for the Quintus, providing not only aerodynamic improvements but also details such as bug wiper "garages". A forward-opening canopy makes getting in and out comfortable. Cockpit blends in either visual carbon or carbon-kevlar hybrid fibre, Alcantara lining, and engraved flap position indicator.
The Quintur M engine start-up is straightforward and automatic. To engage the engine, the pilot only needs to switch on the ignition and press the start button once the engine has been fully extracted. The engine’s start setup is always optimized by a microprocessor to match the current environment. 
After switching off the ignition on the Ilec engine control unit, the control unit automatically stops and fixes propeller in the correct upright position and the engine gets retracted.  
A rudder-integrated tail wheel supports precise steering for taxiing. 
Wing span: 23m / 75.46 ft
Wing area: 14.7 m² / 158.23 ft²
Aspect ratio: 36
Fuselage length: 7.82 m / 25.66 ft
Empty weight: 500 kg / 1102 lb
Max. all-up weight: 850 kg / 1874 lb
Wing loading: 38.8 - 57.8 kg/m² / 7.95 - 11.84 lb/ft²
Max. permitted speed: 270 km/h / 146 kts / 168 mph

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