Jeff Engler of Wright Electric wants it all. He wants lightweight, high-power electric motors and inverters to control them. He wants lightweight generators and now lightweight, high energy density batteries to store that electricity. He wants to meet the goal that, “By 2040, Wright will eliminate carbon emissions from all flights under 800 miles.” A more recent iteration of the company’s web site includes the goal of “Decarbonizing the industries that are hardest to decarbonize.” These would seem heady ideals but Wright Electric seems to be making steady progress toward fulfilling those goals. The Motor Their motor has been tested to 1,000 kilowatts (1,340 horsepower), with expectations that it could reach 2,000 kW (2,680 hp.). According to Aviation Week, “The motor produced 1 megawatt of peak power on a dynamometer test stand at Wright’s facility in Albany, New York. The company has signed a Space Act Agreement with NASA to test the motor in an altitude chamber at the NASA …
Biggest yet from Universal Hydrogen
Universal Hydrogen flew the largest hydrogen-powered aircraft yet at Grant County Airport in Moses Lake, Washington. The DeHavilland Dash 8 was powered on its right side by a MagniX motor and fueled by H2 from a pair of containers in the rear of the fuselage. It made a 15 minute flight to 3,500 feet and settled back to a safe landing It carried “the largest hydrogen fuel cell ever to power an aircraft, “and Universal Hydrogen co-founder and CEO Paul Eremenko “declared the moment the dawn of a new golden age of aviation.” Prep for flight Lightning McClean, Universal’s modified Dash 8, normally flies with up to 50 passengers. The penalty for using H2 for fuel is giving up 10 of those revenue-producing seats, Universal’s Plug Power containers taking up the back rows of the cabin. Other gear included a rigorous evaluation of every component and system, the Dash 8 was ready for taxiing and test flights. Two large hydrogen …
Sailplane-Like Boeing Cruises on SUGAR
Boeing has sustained a decade-long program to develop aircraft that reduce the use of fossil fuels or eliminate it altogether. SUGAR (Subsonic Ultra Green Aircraft Research) program designers have resorted to configurations that were a part of early high-performance sailplanes, those craft that soar on the energy of the very air around them. Sailplane designers know that longer wings give a lower span loading: the weight of the airplane and its payload is spread over a greater span. On powered craft, low span loadings give greater rate of climb for the same power and enable throttling back to get the same cruise speeds. Longer spans usually lead to heavier structures, though. Spars end up weighing more and wings are subject to twisting in the wind. To get around these problems, early designers used highly-tapered wings to move the bending moment on the wings inward, and strut bracing to reduce the cantilevered segment of the wing. Hawley Bowlus used these methods …
VerdeGo’s Integrated Distributed Power System
Erik Lindbergh, grandson of the famed trans-Atlantic flight pioneer, has been paying his dues in aviation for decades, working to involve young people in career-building roles, and advocating for “green” aviation. His latest roles have found him mentoring a group of Embry Riddle students in developing an electric HK-36 (shown last year at AirVenture), and in developing one of the over 100 electric vertical takeoff and landing (eVTOL) potential sky taxis coming into public view. That sky taxi may not make it to market, but Lindbergh and partners’ Integrated Distributed Power system is headed that way. At the 2017 AirVenture, he shared the news that he was working on something exciting. That turned out to be the VerdeGo project, an eight-rotor eVTOL which he developed with co-founder Eric Bartsch and Embry Riddle Director of the Eagle Flight Research Center and Green Flight Challenge competitor Dr. Pat Anderson. Eric is Chief Operating Officer for VerdeGo and Pat is Chief Technology Officer. …
Electric Propulsion for Big Birds
Graham Warwick reports in the August 25 Aviation Week that NASA is investigating the creation of megawatt-scale electric propulsion systems for airliners. These would be much more powerful than those in cars or even semi-trucks, and far lighter than equivalent units in ships. NASA’s research involves partnering with the University of Illinois, Ohio State University, General Electric, and Boeing. NASA Glenn Research Center is working on its own self-cooled, superconducting wound field synchronous motor as part of the overall effort. NASA’s focus, according to the article, “is on electric machines that can be used as generators (sources) and motors (loads) and power electronics that convert AC to DC (rectifiers) and DC to AC (inverters).” Research includes wiring systems that can distribute high levels of electrical power. These efforts would support “near- or medium-term development of partially turboelectric and hybrid-electric propulsion systems for aircraft up to single-aisle airliner size.” Ambitious Goals, Different Approaches Goals are ambitious, with NASA Research Agreements (NRAs) awarded …
Zunum Designs Electric Power Trains with a Software Approach
Zunum is a startup electric airliner firm, helmed by former leaders in aerospace, electronics and software companies. It’s no surprise, then, to see their design and manufacturing efforts following a path that blends those disciplines. Aviation Week reports Zunum just received an $800,000 matching grant from Washington State’s Clean Energy Fund, “its size proportionate to funding already raised from Boeing HorizonX and JetBlue Technology Ventures.” It’s also the second largest of five such awards. Zunum CEO Ashish Kumar describes the grant as, “a significant amount, a significant endorsement and a significant investment at a national level in electric aviation” that “supplements funds from out-of-state sources and will go toward prototype building.” Zunum presses forward on an aggressive schedule, with plans to certify its 10-to-19-seat hybrid electric regional airliners “in the early 2020s.” Founder and Chief Aero Engineer Matt Knapp describes the organization as “mostly a propulsion company with some aircraft development on the side.” Zunum will develop its power system through a series …
EViation Electric Aircraft: Demanding Disruption
Aviation Week reports from the Paris Air Show on a “disruptive” entry in electric aviation. Eviation, founded by Omer Bar Yohai, is primed to deliver a change in transportation as we know it. Yohai says, “The dominant solutions available today are deeply flawed and demand disruption.” The company’s promotional video only hints at the company’s intentions. Their vision statement on their web site, though, indicates a skyward aspiration: “Making electric aviation the fast, competitive and clean answer to on-demand mobility of people and goods.” Aviation Week’s Noam Eshel quotes Bar Yohai as saying, “We design, test and build the tools that will enable future of regional transit by air, changing consumers’ perception of both distance and time. Five years from now, EViation is set to enable cheap, high-speed, sustainable and convenient regional commuting using light aircraft, tightly integrated with on-demand ground transport solutions. Currently, a sub-scale prototype is undergoing testing and risk-reduction evaluations. The company expects its first firm orders …
Uber Elevate Summit Announces Sky Taxis by 2020
A scad of news about electric aircraft hit the internet and newsstands last week. Even USA Today reported on the Uber Elevate Summit in Dallas, Texas – held with many of the participants in the 2017 Sustainable Aviation Symposium a few days before. Big news came from Uber’s announcement that it intends to offer electric VTOL (vertical takeoff and landing) air taxi service in Dallas and Dubai by 2020. Bigger news for SAS participants is that it is partnering with Pipistrel and Aurora Flight Sciences, both presenting at the San Francisco event. Jeff Holden, Uber’s chief product officer, said Bell Helicopters, Brazil’s Embraer, and Mooney Aircraft would also provide “concepts and technologies” for the near-term launch. According to Aviation Daily, “Aurora has already flown a quarter-scale model of its concept, using elements of the electric propulsion system flown in the subscale demonstrator for DARPA’s XV-24A LightningStrike high-speed VTOL aircraft.” Aurora’s concept for Uber is a two-seat eight-rotor (for vertical lift) …
Airbus E-Fans 2.0 and 4.0 Dropped in Favor of E-Fan X
Much like waiting for the single-person ram-jet helicopter to show up in your garage, you’ll be left hanging for a two- or four-seat Airbus e-Fan to grace your hangar. Although not sharing the news in its “Innovation” or press release sections on its web site, Airbus has announced that it’s dropping plans to produce an E-Fan family of personal aircraft. It will move instead into developing a larger, more powerful aircraft, the E-Fan X, that could fly within three years. Airbus started with a four-motor rendition of the Cri-Cri, four MGM Compro units twirling contra-rotating propellers and producing 60 horsepower. Their “Innovation” program followed that with the tw0-seat E-Fan, and announced plans to build these in series at their cleverly named Voltair plant in southwest France. Airbus further suggested series production would begin on a four-seat E-Fan 4.0 touring aircraft. They showed a hybrid version of the E-Fan 2.0 trainer at Oshkosh in 2016. But they are moving on toward bigger …
EAS IX: Aurora Flight Science Set Records without Pilots
John Langford, CEO of Aurora Flight Sciences, has been demonstrating autonomous aircraft for years – a fact he has shared with Electric Aircraft Symposium audiences several times. This year he gave a brief history of Aurora, starting with the Sunlight Eagle, an adaptation of the Michelob Light Eagle, a human-powered aircraft that preceded the most successful long-distance flight by an HPA – the Daedalus with a 76-mile trip over the Mediterranean. The 2009 craft was originally powered with bicycle-like pedals and still holds four world records for human-powered flight. For its two test flights at Las Cruces International Airport, the pedals were replaced with solar panels, an electric motor, a high-performance battery, and a flight control system. Even with all the add-ons, the 114-foot span airplane weighed a mere 173 pounds. This ability to build light, capable airframes coupled with intelligent remote and autonomous controls has led to multi-day endurance craft well suited to ISR (Intelligence, surveillance and reconnaissance) missions. …
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