How do airliners stack up against cars for fuel economy? A German air carrier is trying to achieve efficiencies that will make their airplanes at least as economical per passenger mile as the best economy cars. Europeans have been pursuing an elusive goal for the last 15 years, the 3-liter car. That’s not 3 liters of engine displacement, but the use of only three liters of fuel for every 100 kilometers (62 miles) traveled – about 78 miles per U. S. gallon or 99 miles per imperial gallon. Several cars have done that and better, but sometimes at the cost of driver comfort. The Volkswagen Lupo turbo-diesel (1.2 liters displacement, 61 horsepower), for instance, came out in 1999, and was praised for its fuel economy, but not for its ride or cramped passenger compartment. As small as a Geo Metro, with aluminum hood and doors to save weight, the car did manage some record-breaking runs, including a three-car, around the …
PC-Aero Introduces Solar Elektra One, Solar Trailer
Dr. Birgit Weißenbach, press and marketing director for the firm, announces that PC-Aero and Calin Gologan will appear at the ILA (Internationale Luft- und Raumfahrtausstellung, or International Aerospace Exhibition) Berlin Air Show being held between September 11 and 16 at Roger Airfield, about 11 miles southeast of the city. They will be showing, for the first time, their operational Electric Flight System, comprising their electric and solar-powered Elektra One Solar aircraft and a mobile solar charging station, the trailer in which the motorglider can be transported. Dr. Weißenbach notes that “At the Aero in Friedrichshafen/Germany this year we presented only a mock-up of the Elektra One Solar (Editor’s Note: as they did at AirVenture 2011, showing only stuck on, but not connected solar cells on the shorter Elektra One wing).” The ILA will see the debut of the aircraft with greater span, higher aspect ratio, and a laminar airfoil. Calin Gologan explains, “We do not have to wait for new …
Green Speed Cup – Year Two, Days Three and Four
As the Stemme Green Speed Cup speeds into day five of a six-day series of challenges, the leaders are all – little surprise here – Stemme aircraft. Markus Scherdel took first place on day three’s task, a 346.1 kilometer (214.58 mile) triangle, with a new low in fuel consumption, 2.5 liters per 100 kilometers (94.08 mpg or 188.16 passenger miles per gallon) at an average speed of 142.2 kilometers per hour (88.16 mph). This is impressive because it comes close to requirements for Green Flight Challenge qualification. None of the five Stemmes competing managed less than 4.5 l./100 km. (52.26 mpg), right in Prius territory at much higher speeds. The Diamond DA40 TDI departed the contest because of other obligations for pilot Daniel Hirth: the Arcus electric motorglider did not compete because its limited range would have probably forced an outlanding. The video provides a warp-speed view of day four’s task. Day four found the S6RT, the retractable-gear version of …
Green Speed Cup – Year Two, Day Two
The Green Speed Cup is a closed circuit race similar to the Green Flight Challenge, but with a more free-style approach to how each team flies the course. As reported yesterday, the first day’s competition was won by Markus Scherdel, test pilot for Solar Impulse. The second day’s competition was a complete turnaround of day one’s results, with Wolfgang Uhlig taking the crown and Markus sliding to fourth place. Most interesting, the Diamond DA40 TDI, a four-seat Diesel-powered aircraft flown by Daniel Hirth, took second place. A longer event than day one, the task required pilots to fly from Strausberg down the longest leg of a scalene triangle to Klix, a village in Saxony. From there, they turned northwest to Finsterw Heinri and then sped north back to Strausberg to complete the 326.4 kilometer (202.4 mile) course. Uhlig’s winning S10VT toured the triangle at 163.4 kilometers per hour (101.3 mph) while consuming a total of 202.8 kilowatt-hours of energy, achieving …
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 …
That’s No Yolk!
Dr. Cui is at it again! In a seemingly endless stream of announcements, his work with silicon anodes keeps promising improvements in battery capacity and longevity. The Stanford professor and his team, Stanford’s National Accelerator Laboratory (Formerly the Stanford Linear Accelerator Center), and the Environmental Molecular Sciences Laboratory (EMSL) at Pacific Northwest National Laboratory all published papers on their latest joint accomplishment. Conceptual drawing of silicon filling carbon shell, TEM photo of actual expansion, and life cycle analysis for yolk-shell batteries Expansion and contraction of anodes and cathodes during charging and discharging of batteries causes flexing and eventual breakdown of a battery’s internal components. Cui and other researchers have tried various strategies to mitigate or eliminate this flexing, but the latest tactic seems to promise longer battery life and greater power and energy. Calling it a “yolk-shell structure,” researchers seal commercially available single silicon nanoparticles in “conformal, thin, self-supporting carbon shells, with rationally-designed void space between the particles and the …
Kickstart Kicks John McGinnis to Announce New Goals
A few minutes ago, John McGinnis, designer and ongoing builder of Synergy, released the following announcement. It is based on the 385 supporters who have contributed 81 percent of the initial $65,000 goal to complete the first phase of construction on this envelope-exploding aircraft. “We are thrilled to report that Synergy is on track to become the first crowdfunded aircraft of the Internet era. Thank you to all contributors, large and small. You have really gotten behind us and the power of your enthusiasm is both contagious and humbling. “What does this mean? Well, unless something goes terribly wrong (and it could, we’re not funded yet) it looks like there is support for us to complete this phase of our construction, getting the landing gear on and the engine powered up. “That’s not quite the same as finished. If we don’t raise our minimum, we get nothing, so deciding where our project goal should be was a big deal. Now …