In a series of far-reaching competitions for university students, the FAA has opened the gates on innovation for new aircraft and airport infrastructure design. Announcing the winners of its Design Competition for Universities, the FAA awarded three prizes in the Electric/Hybrid Electric Aircraft Competition. In doing so, it acknowledged the pioneering work of the CAFE Foundation and NASA in promoting the original Green Flight Challenge, generously supported by sponsorship from Google. “Recently, the Green Flight Challenge and efforts of general aviation manufacturers and others have demonstrated flight using electric motors on general aviation aircraft. Under NASA’s Subsonic Fixed Wing Project, aircraft and engine manufacturers identified key technology capabilities required for electric and hybrid-electric propulsion of single aisle aircraft, expected by 2030.” To expand on the promise of the GFC, the FAA requested that competition entrants design, “…a regional size aircraft (25-50 seatclass) that uses electric or hybrid-electric propulsion with a cruise Mach of 0.72 – 0.8, 500 nm range and …
Avoiding Propeller Strikes on Electric Aircraft
At last year’s Electric Aircraft Symposium, Ron Gremban, developer of the Prius plug-in hybrid, shared several questions about promoting safety in electric aircraft. One aspect that provoked deep thought was that of safety for those working around an electric airplane, whose propeller could start quietly and possibly strike an unaware bystander. During the Green Flight Challenge, it was noteworthy that unlike their gasoline-powered counterparts which idled while awaiting takeoff, the Pipistrel G4 and e-Genius awaited their turn to launch with propellers at rest, only spinning when commanded – and very quietly at that. The question of avoiding prop strikes found at least one answer at EAS VII. Karl Kaser demonstrated, in model form, his ePropeller Safety Device (eSD), noting “the risk to people, animals or objects in the propeller disk area and that they can be injured or damaged accidentally during the run-up of the propeller.” He first noted that issue in the case of e-Genius, on which he was …
Flying e-Genius for Two Years
At this year’s Electric Aircraft Symposium, Rudolf Voit Nitschmann, Len Schumann, and Ingmar Geiss shared their well-documented experiences with e-Genius, second place winner in 2011’s Green Flight Challenge. Flown by Erik Raymond and Klauss Ohlmann, the airplane managed 397.5 passenger miles per gallon on its 200-mile trek around a closed circuit between Santa Rosa, California and the distant geothermal power plants that provided the electricity for its flight. As Voit Nitschmann, leader of the e-Genius team since 2005 noted, one must design electric aircraft around the beneficial aspects of such vehicles to gain the greatest performance. Originally slated to be hydrogen powered, e-Genius mounts its 59-pound motor on the leading edge of the vertical rudder, more difficult with a heavier internal-combustion engine. This permits ample propeller clearance, provides blade protection and allows a short, retractable landing gear that is light and simple. With no turbulent flow over the nose, the cockpit can be streamlined like that of a sailplane and …
Panthera rollout and first engine start
On March 28, Pipistrel rolled out its prototype Panthera, a sleek four-seat cruiser destined to be the first production hybrid aircraft and eventually, Pipistrel’s second four-seat electric airplane. It is currently powered by a Lycoming IO-390, 210 horsepower engine. At Pipistrel’s factory in Ajdovscina, Slovenia a team of engineers and technicians fired up the engine for the first time and performed ground runs, “verifying design parameters and engine operation.” Pipistrel’s press release quotes Ivo Boscarol, their CEO: “It is very exciting to witness the tests and see the aeroplane come to life for the very first time. This is definitely a very important milestone in the development of Panthera. We look forward to the continuation of tests and the first flight soon!” With the Lycoming powerplant, Panthera can take four people 1,000 nautical miles (1,150 statute miles while cruising at 200 knots (230 mph) and burning 10 gallons of avgas per hour – 92 passenger miles per gallon. While not …
Three Years, 392 Entries, and About a Quarter-Million Words
Today marks the start of your editor’s fourth year of attempting to cover the exciting world of electric and alternative energy flight. In the last three years, the CAFE blog has seen the development of larger and more powerful motors, higher speeds, better batteries, and the promise of new technologies and serious investment by major players in this new realm. At the same time, electric flight is still new enough to attract garage scientists and record seekers. We’ve seen electric aircraft top 200 mph and make it into international record books. We’ve seen solar-powered craft extending their wings around the world and alternative fuels extending the range of existing aircraft. A few stories in the wings will highlight possibilities that would have been almost unthinkable three years ago. The Green Flight Challenge doubled the expected parameters of what we thought achievable less than five years ago, and there is no reason to think that progress will not accelerate in the …
UAVs, Canine First Officers, and Semi-automated Flight
Dr. Brien Seeley, founder and President of the CAFE Foundation, will speak on “The CAFE Green Flight Challenge Program,” at the Unmanned Aircraft Systems conference at San Diego, California, October 10 through 12, 2012. His talk fits well into the conference’s sub-title, “Opportunities, Needs and Challenges,” and will probably reflect the direction he’s been pointing to with recent CAFE presentations on aerial commuting and pocket airports. The Green Flight Challenge certainly showed that the nascent technology is capable of giving fast, short-range transport at a potentially economical price. The conference will focus on military uses of UAVs and how to integrate them with existing hardware and systems. Since many military-based unmanneds will be navigating our civilian skies in the near future, civilian pilots and air traffic control systems will be obliged to integrate their resources to allow safe passage through what could be skies crowded with autonomous craft. Governor Jerry Brown recently signed a bill that allows self-driving cars on California highways. …
The Green Speed Cup – Year Two
How economically can we fly, even with current technology? In its second year, the Green Speed Cup is an attempt to answer that question, provide some sporting competition and allow scientific research into the manner in which the greenest aircraft operate. Organizer Stemme’s newsletter explains the GSC, “Is a competition for any kind of two-seated aircraft. The target of the GSC is to fly as fast as possible while minimizing the consumption of fossil fuel energy. It is a direct comparison of technologies, machines, materials and the capabilities of the pilots. “The competition should help to find new ways and practical solutions for saving energy during powered flights. The aircraft that flies with the best ratio of fuel-consumption per distance and speed will win the competition. “The GSC also provides a database for scientific research for fuel efficient flying, done by the University of Dresden, Germany. So the GSC is challenge and fun for the pilots and a contribution to …
Pipistrel,PADA, and “Gus” Raspet
Pipistel, the innovative Slovenian company that won the Green Flight Challenge with its G4 electric four-seater, continues to earn plaudits from the aviation industry. At this year’s AirVenture, the Experimental Aircraft Association’s annual gathering at Oshkosh, Wisconsin, the company was honored with the Dr. August Raspet Memorial Award and original and pace-setting design work exemplified in Pipistrel products. The Exerimental Aircraft Association has awarded the “Dr. August Raspet Memorial Award” annually since 1960 “to a person who has made outstanding advancements in the field of light aircraft design and the Experimental Aircraft Association.” John Thorp, Lockheed engineer and designer, was the first recipient, with those following including Curtiss Pitts, Burt Rutan, Alan and Dale Klapmeier and Gordon Pratt. Taja Boscarol, in the company’s press release, notes that, “This year’s award being given to the Pipistrel Team is definitely proof that Pipistrel’s innovativeness is now fully recognized and appreciated even in the cradle of the aviation industry, the USA.” Michael Coates, …
Fastest Electric Airplane Emergency Landing Yet
Chip Yates is used to going fast, having obtained a private pilots certificate in a mere two months, and test flying an electric Long-Eze conversion (Long-ESA) within two weeks of that, but he didn’t count on making the world’s fastest electric aircraft emergency landing during a record-breaking speed run at Inyokern, California’s desert airport on July 19. With only 58 hours in his log book, Chip managed to make the runway for a bumpy but great touchdown – a great landing being one following which you can reuse the airplane. We’ve reported that event already, but Chip just released a great video of the white-knuckle event. To help document his record 202.6 mph flight, Chip’s airplane was well instrumented, carried several cameras, and had a chase plane to provide eye-witness oversight. In the two months he and fabrication partner Chris Parker of CPR Fabrication converted a Long-Eze into the world’s most powerful electric airplane (258 horsepower – 58 more than Green …
Annual Personal Aircraft Design Academy Dinner and Presentation at AirVenture 2012
Dr. Brien Seeley, President of the CAFE Foundation, and Program Chair for the Personal Aircraft Design Academy (PADA), announces that the group’s catered buffet “networking” dinner will be followed by a special meeting for top aircraft designers, enthusiasts and aero engineers as part of AirVenture 2012 at Oshkosh, Wisconsin. His announcement highlights the following: “The dinner will be at 6:15 p. m. on Friday July 27 at the Memorial Wall Tent near the Air Academy Lodge, with the PADA meeting following at 7:30 PM in the air-conditioned Vette Theatre inside the AirVenture Museum, a short walk from the tent. “This year, we’ve made it easy to register online in advance for the limited seating available. Please visit this site now to get signed up: “PADA Dinner Registration. “PADA history is available at PADA History. “Keynote speaker for PADA 2012 will be electrical engineer and aeronautical innovator Tine Tomazic, who will present the amazing story of the electric powered, 403 pMPG Pipistrel …