Electric Apis - only for testing EMRAX motors (not for selling)
EMRAX motor has been tested several times on glider planes – Electric Apis EA1 and EA2
EMRAX motor has been tested several times on glider planes – Electric Apis EA1 and EA2. Electric Apis EA1 is one of the first electric sailplanes in the world and the first one in Slovenia EU (the first flight was 18. April 2005). It can take off with an electromotor and climb up to altitude 1800 m at 50%DOD, even to altitude 3000 m at 90%DOD. The altitude depends on the percentage of the discharging of the Li-Poly batteries. The best recommended discharging of the batteries is about 50%DOD. In this case the altitude is app 1800m and the batteries can give 1500 cycles. More info here: http://kokam.com/english/product/kokam_Lipo_01.html
We developed EMRAX electric motor because there was no suitable electric motor for directly driving the propeller in the world market. The high powered - BLDC electric motor EMRAX 30 kW continuous power is reliable for each altitude. It operates with minimum noise and gives high power and excellent torque at low RPM (direct drive prop) for best climbing up to 6,0 m/s.
In the future solar cells on the wings will give enough nature energy for many take offs and the plane will climb much over 3000 m of the altitude.
AMS flight used to produce APIS sail planes in many versions. The company PIPISTREL is now a new owner of APIS gliders project now. More info here: http://www.pipistrel.si/planes/721
In 2004 we got kit version of Apis EA1. Besides developing an electric propulsion system, we also change the canopy design, made more effective inner ventilation, developed the retractable wheel with shock-absorber and many new designs for electric power system. The retractable wheel improves L/D = 41:1 and it also visually improves the stream line of the plane. The doors on the body are closed when the motor with the propeller is outside or inside of the fuselage. The electric system does not produce noise, it is clean, safe, reliable and virtually maintenance free. We are in favor to make reliable innovations, which are the most important for comfortable in enjoyable flying.
Technical data and performance of glider plane Electric Apis EA2
Technical data and performance of glider plane Apis EA2 using brushless electric motor named EMRAX:
| Electric Apis EA2 – Technical data and performance | |
|---|---|
| Electric motor | aircooled EMRAX |
| Electric motor weight | 10,5 kg (light version special for EA2) |
| Controller DC/AC | SAC41 (aircooled, Piktronik) |
| Engine peak power (2min) | 40 kW - 54 hp at 200 V DC / 2000 RPM |
| Torque continuous/peak | 130 Nm / 200 Nm |
| Engine speed EA2 | 1800 RPM at 200 V DC (direct prop drive) |
| Propeller diameter EA2 | 1,8 m |
| Static prop thrust (prop dia 1,8 m) | 1500 N |
| Batteries Li-poly - power capacity | 8,0 KWh |
| Capacity current | 40 Ah |
| Voltage DC (no load) | 230 V |
| Batteries weight | 55 kg |
| Charging time - depends of DOD | 4 - 6 hours / 230V |
| Take off distance on grass/time | 70 m (7 seconds) |
| Take off distance on asphalt/time | 50 m (5 seconds) |
| Max climb rate | 6,0 m/s |
| Max altitude 50%/90% discharging | 1600 m/3000 m |
| Best glide | 41 : 1 at 95 km/h |
| Empty weight | 280 kg |
| Max take off mass | 370 kg |
| Max horizontal flight distance | 200 km |
Videos – EMRAX electric motor on Apis EA1
In 90 seconds climbs up to 350m - included take off. Temperature on copper EMRAX prototype 30kW (41HP) air cooling motor windings was only 70°C. Max altitude is 3000m at one charging the batteries.
Video: Take off and retracting the propeller in to the fuselage EA1
NEW Video: Take off on asphalt running way
Video: Take off Ferlach, Austria
Video: Take off, low pass, landing
