A Green Flight Challenge entrant, PC-Aero’s Elektra One, has won the Lindbergh Electric Aircraft Vision Award at AirVenture 2011 in Oshkosh, Wisconsin, becoming the latest winner of this important award for innovation in the pursuit of “green” aviation. Past winners of the Lindbergh Prize for Electric Aircraft include: Pipistrel: 2011 Aero-Friedrichshafen Best Electric Aircraft LZ Design: 2011 Aero-Friedrichshafen Best Electric Propulsion System Solar Impulse: 2011 Aero-Friedrichshafen Outstanding Achievement Award Yuneec International: 2010 AirVenture Best Electric Aircraft Sonex: 2010 AirVenture Best Electric Aircraft Subsystem Lange Aviation: 2010 AirVenture Individual Achievement Award According to Erik Lindbergh, grandson of Charles Lindbergh and founder of LEAP, the organization’s, “Programs recognize, inspire and incentivize the innovation that drives our culture, economy and future. The LEAP Electric Flight Program is accelerating the development of the electric aircraft industry through a range of activities, from prizes to advocacy.” This year’s award, “Focuses on innovation with a “vision” for integrated electric power for an aircraft and its supporting …
Google to Sponsor Green Flight Challenge
Green Flight Challenge sponsored by Google to bring historic firsts to aviation Aviation’s largest ever prize to be awarded at Moffett Field October 3 during exposition hosted by NASA SANTA ROSA, CA (July 29, 2011) – The CAFE Foundation announced today that Google will sponsor the NASA Centennial Challenge flight competition known as the Green Flight Challenge (GFC). CAFE (Comparative Aircraft Flight Efficiency) will conduct the event from September 25 through October 2, 2011 at Charles M. Schulz Sonoma County Airport. The NASA-funded prize purse of $1.65M makes this the largest ever prize for aviation. Competing aircraft must demonstrate at least 100 mph and 200 passenger MPG on a 200 mile flight. The aircraft in the Green Flight Challenge sponsored by Google represent a diverse mix of singular prototypes created expressly for the competition by some of the world’s top designers. Most will be propelled by batteries and electric motors, some by bio-fuel or hybrid. All competing aircraft will be …
Elektra One Flies Into Oshkosh with Solar Cells
As described before in this blog, PC-Aero’s Elektra One is a single-seat electric airplane with an Eck/Geiger 13.5 kilowatt motor in the nose, and now at least partially solar powered. http://www.youtube.com/watch?v=r03nim-6qBw&feature=related Designer Calin Gologan gives a walkthrough of the design features which make Elektra One such an efficient airplane, and one likely to give other competitors in the Green Flight Challenge a good run. While he describes the thin carbon-fiber shells which comprise the airplane’s primary structure, notice the light shining through. That thinness helps explain Elektra One’s 100 kilogram (220 pounds) empty weight, only about 100 pounds of which is structure. The motor is 4.7 kilogram (10.34 pounds) and the controller is a 270 gram (9-1/2 ounce) model airplane marvel. Batteries can add up to 100 kilograms and the pilot another 100 kilograms, making the strength-to-weight ratio of the craft rather impressive, and its payload carrying abilities among the greatest for flying machines. Gologan claims a maximum range of 500 …
A Useful Spreadsheet and GFC Handicapping Tool
For analyzing the greatest economy from an aircraft’s design, Howard Handelman, a highly-engaged reader of this blog, provides a link to his web site, which includes a downloadable spreadsheet he has devised that will give the inquiring reader hours of enjoyment. Handelman, self-described as, “just a retired IT guy,” with “weak math skills,” but a “compulsively curious” nature, has devised a tool for analyzing any airplane’s performance based on a few known variables, and which he has applied to many of the Green Flight Challenge’s aircraft. The basis for his analyses is his “triangle tool,” a wedge that can be used to help design propellers, “test [the] truth” of claimed aircraft performance, and estimate brake horsepower in real life circumstances (at least within the parameters of the triangle tool). Handelman notes that some aircraft, including those with laminar flow, will “not fit the model very well because they don’t fit the V-squared curve. Synergy won’t look anything like the model.” His findings …
Green Flight Challenge: New Schedule and Rules
CAFE announced June 30 that the CAFE Green Flight Challenge has been officially rescheduled for Sunday, September 25 through Monday October 3, 2011. It will still take place in Santa Rosa, California. A revised prize structure for the event has been approved and is detailed on the organization’s web site. Originally scheduled to run between July 10 and 17, 2011, various factors led to the decision to reschedule. The restructured prize schedule changes the orginal “winner takes all” approach to a distribution of awards, with the winner still taking a substantial $1.3 million. A series of formulas have been added to determine distribution of awards if more than one teams exceeds the 100 miles per hour, 200 passenger miles per gallon criteria. Another formula redistributes the $150,000 prize for best bio-fuel powered craft if no bio-fuel entry achieves the GFC criteria of 80 mph and 160 passenger miles per gallon.
Ingenious e-Genius
At the third annual Electric Aircraft Symposium in San Carlos, California in 2009, designers from Germany and Slovenia showed their plan for a hydrogen-powered aircraft called Hydrogenius. Today, a newly constructed, battery-powered “e-Genius” (developed along parallel lines with Hydrogenius) will be Eric Raymond’s mount for the July 10-17 Green Flight Challenge in Santa Rosa, California. Eric writes that “e-Genius is now flying, and has reached the required 100 mph.” Hydrogenius’s original layout, replaced for the Green Flight Challenge with a simpler lithium-polymer battery-only system. 1 – Hydrogen tank 2 – Radiator 3 – Stack Module (Hydrogen Fuel Cell) 4 – System Module (Hydrogen Fuel Cell) 5 – Power Distribution Unit 6 – LiPoly Battery to start the fuel cell system 7 – Total Rescue System e-Genius’s 60 kilowatt (80.4 horsepower) motor is claimed to be able to fly 100 kilometers (62 miles) on the electrical equivalent of a mere 0.6 liters (0.16 gallons) of gasoline, or about 392 miles per gallon. As …
PhoEnix GFC Update
Jim Lee’s informative and beautifully illustrated blog features “PhoEnix with the capital E in the middle,” the motorglider he will fly in the CAFE Green Flight Challenge in July. Electrically powered with a Krall 44 motor, it has a pointy nose and retractable gear to make it more slippery than the already high-performance Phoenix without the capital E and with a mere Rotax behind the propeller. According to Lee, the 14.5 meter (47.57 feet) modified Schempp-Hirth Discus wing is raised above the low position of the gas-powered version to make room for the electrically-retracted gear, which hides in what was originally a luggage compartment – another change from the standard Phoenix. The wing is configured to win the GFC, as is the rest of the airplane. Lee, the U. S. distributor for Phoenix Air, says in his blog, that “the PhoEnix is purpose built for a race. A race that offers big bucks for the winner, but with a bar set so …
Synergy: A Practical Lightplane for the New Century
At EAS V, Synergy Chief Operating Officer John Paul Noyes framed his presentation of the Synergy aircraft by showing a picture of a 1973 portable telephone, then comparing it to a current model. The clunky size, heft and limited utility of the former compared with its slim, feature-laden modern counterpart tells a story of intense design improvements, quantum increases in capabilities and far lower costs for a significantly better product – something usually anticipated in the history of modern products. Along with that historically comparative pairing, though, he showed pictures of a 1973 Cessna 182 and its Lycoming engine along with shots of modern examples of the two. Not much other than the paint scheme distinguishes today’s Skylane from its antecedent. Following Noyes’ outlook, it’s a bit disheartening to review Wikipedia’s specifications for 182s for the past 54 years. Little, other than the introduction of improved instruments and Omni-Vision, has changed. Although a great deal of this is due to …
Pipistrel’s Four-seat, Side-by-side Electric Airplane
One of the most anticipated presentations at this year’s Electric Aircraft Symposium in Santa Rosa, California, April 29th and 30th, was that of the CAFE Foundation’s Vice-President, Larry Ford. He had the enviable task of unveiling the contenders in the Green Flight Challenge – a mix of conventional aircraft powered by unconventional means, unconventional craft being sent aloft by a variety of the mundane and the exotic, and wildly unconventional concatenations of technologies. Pipistrel’s G4 turned out to be simple math: G2 plus G2 equals G4. The configuration could hardly be preconceived, though. According to Pipistrel USA’s Michael Coates, “This unique design has come about by grafting two Pipistrel Taurus aircraft together with a center section which is some 5 meters (16 feet) wide and includes a center pylon housing the electric engine and batteries designed to successfully carry this aircraft to the skies and hopefully to the completion of the 2011 CAFE/NASA challenge, the design bears some similarity to the twin …
Phoenix or PhoEnix – a Nice Airplane
While at Sun n’ Fun in Lakeland, Florida, we couldn’t help but notice Jim Lee’s Phoenix Air Phoenix, an S-LSA (Special Light Sport Aircraft) motorglider from the Czech Republic, posed as it was on the line of march into the air show area proper. Your editor was interested in the PhoEnix, the electric version of the proper looking and highly attractive Rotax-powered version in the Light Sport Aircraft display display, next to its Pipistrel neighbors. There were a great many middle European LSAs being shown, but the Phoenix had ended up on the Airshow’s promotional poster, neatly avoiding the FA-18s of the Blue Angels. The electric version will be competing in the Green Flight Challenge, so revelations from Jim Lee, the airplane’s U. S. distributor and pilot in the GFC, were the usual furtive responses to detailed questions. All competitors are being careful to avoid revealing too much until after Larry Ford’s presentation at the fifth annual Electric Aircraft Symposium in …