Sinus Flex model is identical to the standard Sinus, with the added bonus of interchangeable wing-tips. The outer 5-foot portions of each wing can be easily taken away and replaced with short winglets of a Virus model! You can't decide if you want a Pipistrel Sinus or a Pipistrel Virus? Now you can have both, a thermal-soaring Sinus motorglider which you can quickly and easily (about 5 min of work) transform into a small and fast Virus cruiser, which can fit into any hangar! 

Best fuel efficiency and best range
Sinus is simply the most efficient and economical light aircraft on the market! Given its super-low fuel consumption of less than 10 liters per hour (2.6 gph) at a high cruise speed of 200 km/h (110 kts), you can easily fly over 1000 kilometers (540 NM) already with standard 60 liter (16 gal.) fuel tanks. With optional long range (100 liters; 26 gal) fuel tanks your range with reserve goes beyond 1650 km (890 NM)!