Search Results for : Rotax electric

Electric aircraft may still have minuscule market share but innovations could change that in the near future. As Aero correspondent, Roy Beisswenger wrote, “This is a rapidly changing technology with both motors and applications showing up all over Aero Friedrichshafen.” This year Aero management concentrated them in one of the big halls where small startups to the heavyweights were located. Thanks to Roy for several reports from Aero, of which this is one. —DJ
Many of the exhibited motors are for very light applications such as light-weight shift control trikes or gliders but motors are becoming more powerful. With an increase in power, new technical problems need to become overcome. For example, the larger the power capability of the motor, the more cooling is required for the motor. Smaller motors are mostly air-cooled, but some of the medium and larger motors require liquid cooling. This doesn’t mean that the motors have radiators, but liquid is built into the motor to help wick heat away from hot spots that are created when electricity is converted to mechanical power.

Aircraft engine giant, Rotax BRP has reached an anniversary: forty years of making powerplants used around the world by airframe makers of ultralights to Very Light Aircraft. Thus, it was hardly a surprise when Light-Sport Aircraft came along eleven years ago that the Austrian company immediately became the largest supplier of engines … capturing an estimated 80% of the market, even while other ASTM-approved engines are in use from Continental, Jabiru, Lycoming, and HKS. New candidates include Superior’s Gemini Diesel and, of course, the ECi Titan 180-horsepower engine has seen good acceptance. Then we have another batch of engines for kit-built aircraft including Viking (based on Honda), UL-Power, AeroVee (VW), AeroMomentum (Subaru), Corvair, and more.
Despite the many other choices, Rotax has retained a dominant position. I’ve long felt that while it can be challenging to bring a new airframe to market and win some customers, it is even harder to introduce a new engine.

With our friends at the prestigious Flying magazine putting Airbus’ E-Fan on their July 2015 cover, flanked by a major story inside, it seems everyone is following electric propulsion ever more closely. We’ve been doing it for a while as light aircraft are clearly the first place where electric power is best applied. Airbus may be planning an electric airliner but I don’t expect to see that anytime soon. Meanwhile the giant builder of airliners is indeed pushing forward with a two-and four-seat E-Fan.
However, I see another use of electric motors that strikes me as very compelling, and in the very near term. I wrote about a Spanish project earlier and here is another.
Many years ago when I was a young flight instructor, I dreamed up an idea called JERA, the Johnson Emergency Rocket Assist, born out of a small rocket engine that some gearheads were applying to go-carts on steriods.

A few years back at Aero 2009, Flight Design and Rotax teamed up on a very interesting project. Based on the R-912 engine they added an optional electric motor that could provide additional torque (a characteristic electric motors have in abundance) for takeoff and climb or for emergency power in the event of a failure. The idea more than intrigued me and many others but it quietly disappeared.
Recently a Spanish university announced it had taken this concept to the next step. The team investigating this seemed focused on the emergency factor but opened the door to combined used of electric motor and gasoline engine. In case of a conventional engine failure, while very unlikely, an electric motor can, they said, deliver another 20 kilometers or 12.5 miles of range. That would be a literally saving grace to the pilot and occupants of a troubled aircraft.
Researchers at Universidad Carlos III de Madrid (UC3M) and the Axter Aerospace firm developed an electric propulsion system to install in light aircraft to deliver extra power and range in emergency situations.