FLY in the future with an electric self-launch sailplane APIS Electro Energy

ELECTRIC APIS EA1 is one of the first sailplanes in the world and the first one in Slovenia ( the first flight was 18. April 2005), which can take off with an electromotor and climb up to altitude 1800m at 50%DOD, even to alt 3000m at 90%DOD. The altitude depends on the percentage of the discharging of the Li-Poly batteries. The best recomended discharging of the batteries is about 50%DOD. In this case the altitude is app 1800m and the batteries will give 1500 cycles. The starting motor is reliable for each altitude. It operates with minimum noise and gives enough power for best climbing up to 5,0 m/s. In the future solar cells on the wings will give it enough energy to take off next time and to climb much over than 3000 metres in altitude. AMS flight http://www.ams-flight.si/ used to produce APIS sail planes in many versions. I was developed an electric propulsion system in my firm called ENSTROJ. In that time AMS made kit parts for my Apis e.e. The firm PIPISTREL is a new owner of APIS gliders project now. http://www.pipistrel.si/planes/721 Apis e.e has a newely designed canopy, an more efective inner ventialation, it has a retractable wheel with shock-absorber and many new designs for electro power system. The retractable wheel improve L/D = 41:1 and it also visually improves the stream line of the plane.The doors on the body are close when the motor with the propeller is outside or inside the fuselage. The electric system does not produce much noise, it is clean, safe, reliable and virtually maintenance free. Tehnical data and performance using the NEW tailor-made brushless electric motor named EMRAX:

El motor -----------------------------brushless EMRAX, Electric motor weight --------------------- 10,2 kg, Controller DC/AC - Piktronik ---------------------- SAC - 40 (aircooling), Engine shaft pick power (2min) ----------------- 30 KW (aircooling at 25 m/sec), Engine shaft constant power -------------------- 26 KW ( aircooling at 25 m/sec), Engine speed ----------------------------------------- 1800 RPM ( direct prop drive), Propeller speed -------------------------------------- 1800 RPM, Propeller diameter----------------------------------- 1,7m , Batteries Li-poly power capacity ---------------- 8,0KWh, Capacity current ------------------------------------- 40 Ah, Nom voltage------------------------------------------- 200 V, Batteries weight-------------------------------------- 54 kg, Charging time - depend of DOD ---------------- 4 - 6 hours/230V , Take off distance on grass/ time --------------- 70 - 90 m ( 8 sec), Max climb rate with pick engine power ------ 5,0 m/s, Max altitude 50/90% discharging -------------- 1800m (3000m), Best glide --------------------------------------------- 41 :1 at 95 km/h , Empty weight ---------------------------------------- 250 kg, Max take off mass ---------------------------------- 350 kg, Max horizontal flight distance ------------------- 200 km