The Pipistrel Sinus is an ultralight motor glider of the Slovenian company Pipistrel.
The development of the sinus began in 1994 in close cooperation with the Slovenian company Alabastar Ltd.. Just one year later, the project was presented at the AERO in Friedrichshafen 95 the first time. In 1996 the first flight of the prototype. 2001 Philippe took Zen and Thomas Knowles in part with a sinus at the World Air Games in Spain and took first place in the double seat time saved.
Sinus is a modern two-seat ultralight aircraft in plastic construction. The wings of the shoulder Deckers are designed more as compared to the sister model virus to the glider and provided with both fault and with flaps in the form of flaperons. The manual pitch propeller ( Pipistrel VARIO ) can be aligned parallel to the longitudinal axis of the aircraft with the engine off to reduce drag in gliding operation.
In addition to the standard version with tail wheel is also the sine northwest with tricycle landing gear. As motor 582 and 912 models are the Rotax 503, used.
Since 2010, adapted to the Zulassungebedingungen the U.S. LSA category version exists. Since the U.S. regulations exclude a variable pitch propeller for this class, the angle of attack of the propeller blades is hard-coded in this version in powered flight; , shut off the engine, the propeller automatically moves into gliding position.
Because of its relatively high cruising speed of 200 km / h, the sine terms of performance can easily keep up with classic touring motor gliders like the Super Dimona. Additionally, it features with a glide ratio of 1:27 gliding properties that match those of a Schleicher K 8.