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e Training SportStar EPOS with a REB 90 motor (80 kW), MGM COMPRO HBC 400400 controller (see large photo page 28) and LiPo 80 Ah battery (<strong>36</strong>0 V). The flight duration is 60 minutes. In the following years, MGM COMPRO had to overcome numerous challenges to bring about the success of the complex electric drive systems. Innumerable problems arose in the field of sensors, in the monitoring of critical parameters, in the emergency disconnection system and in the braking system, just to name a few examples. In the end, the components developed by MGM COMPRO included the electronic speed controller, the battery management system (BMS), the battery packs, the chargers, etc., i.e. the entire electric drive system except the engine. At the same time, a new company named RotexElectric was set up to focus on the production of industrial and aviation engines. Nowadays, this brand offers air-cooled and water-cooled electric motors from 10 kW to 100 kW, with a 160 kW engine already in the development phase. Once the barrier to higher performance has been surpassed, the aviation engines are used in manned hang gliders, motorized paragliders, UL trikes and motorized sailplanes. A prominent customer is the foot-launched highend glider Archeopteryx designed by Ruppert Composite from Switzerland. Elec’teryx’ electrically powered self-starting version uses the MGM COMPRO RET 30 engine (12 kW and 4.1 kg). In conjunction with two battery cells with a total capacity of 40 Ah, the motor glider can climb to 1300 meters in 11 minutes at full thrust, whereas a flight duration of 60 minutes is possible under normal flight conditions. The entire electric drive system (including battery) weighs 23 kg and can be mounted and removed within 5 minutes. Electric motor The currently strongest electric motor in the portfolio of MGM COMPRO is the REB 90 with a maximum output of 80 kW. It is a special development for the project SportStar EPOS (Electric Powered Small Aircraft) of the Czech aircraft manufacturer Evektor. The SportStar EPOS, still in development, is a concept for the sport aircraft of the future, combining eco-friendly flying with low operating and maintenance costs. MGM COMPRO also supplies the power electronics in this case, which enables optimal use of the stored electrical energy. In addition to the known advantages of electric flying, such as zero Carbon and low noise emissions, the net energy cost of the flight is about 75% lower than in aircraft with internal combustion engines. Furthermore, the number of components in an electric drive train is almost 90% less than is the case with conventional combustion engines, which clearly shows lower maintenance costs 30 e Flight Journal 2 / 2017
e Training for electric vehicles. The Airbus E-Fan mentioned earlier used four RET 60 (25 kW) motors for driving the two ducted propellers. An interesting detail is that Airbus engineers also installed a 7 kW REG 30 engine to drive the main gear to minimize the inefficient thrust generation through propeller at low ground speeds. Thus, the company MGM COMPRO contributed decisively to the Airbus success in the Channel crossing. It needs to be mentioned that Airbus officially ended the E-Fan project in the spring of 2017 to focus on other electric flight demonstrators. Other Projects Another interesting project involving MGM COMPRO was the CriCriElectric. This joint development of EADS Innovation Works, Aero Composites Saintonge and Green CriCri Association is based on the kit CriCri, a mini twin whose design dates back to the 1960s and had its maiden flight on July 19, 1973. The first all-electric version of the CriCri started on September 2, 2010 in Le Bourget for their first flight. It was equipped with four REG 30 (10 kW) engines that powered two traction and two pressure propellers. The electric drive system allows 15 minutes aerobatics, making the CriCriElectric the only four-engine electric aerobatic aircraft in the world. In a converted MC15E CriCri equipped with two Electravia GMPE 104 E engines, each producing 25 kW of maximum power, French stunt pilot Hugues Duval flew from Calais to Dover and back on the eve of July 10, 2015, the day of the E-Fan channel crossing back. The Aero Club France then congratulated him on the first all-electric world record over the English Channel. Another field of application for the lower power drive trains is the EGO suspension glide trikes from Ultralight Design. The lightweight single-seater carbon fiber trikes, together with the AIR surface, achieve very good flight performance. In addition, the MGM propulsion systems are also used in the electric SONG UL aircraft and in various electric motor screen drives. CriCriElectric with four REG 30 (10 kW) motors, MGM COMPRO HBC 120120 controller and LiPo 40 Ah battery (120 V). The flight duration is 45 minutes. 2 / 2017 e Flight Journal 31
Page 1 and 2: Electric Aviation, VTOLS, Multicopt
Page 3: e ditorial Step by Step AAt the mom
Page 13 and 14: · News 171 CERTIFIED I MOTORGL
Page 15 and 16: e Airshow For the first time the eH
Page 17 and 18: e Innovation e Training Kitty Hawk
Page 19 and 20: e Innovation Todd Reichert, the pil
Page 21 and 22: e Training e Innovation 2 / 2017 e
Page 23 and 24: e Fly-In Successful landing: Willi
Page 25 and 26: e Fly-In Smartflyer Challenge Grenc
Page 27 and 28: e Fly-In Ultralight trumps at the e
Page 29: e Training Airbus E-Fan with four R
Page 33 and 34: e-organizations 5 ACTIONS TO MAKE U
Page 35 and 36: Bimestriel paramoteurs - paratrikes

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