Airports and air bases occupy lots of space, especially if they have crossing runways. The acreage consumed to protect the public from the long narrow strips of asphalt or concrete can be considerable. Making good use of the “waste” space might make airports more economically viable. Arizona’s Luke Air Force Base is planning to use its space to generate electricity through solar power, just as Nevada’s Nellis Air Force Base has since 2007. According to the Associated Press, the “Arizona Public Service Co. has announced plans for the largest solar installation on U.S. government property.” The 15-megawatt solar power plant will be 1 mW larger than the system at Nellis, and will be online by next summer. 52,000 tracking solar panels located on 101 acres on the Base will supply about 50 percent of the facility’s electrical needs, or the equivalent required for 3,750 Arizona homes. The project will create 550 jobs and remove 19,000 tons of carbon dioxide emissions per year, according to …
Power From the People
GENeco, a United Kingdom waste treatment company, announced its new green alternative to fossil fuels – the methane from waste treatment plants. Proposed over 40 years ago in the U. S., the energy source was ignored as an automotive (and potential aircraft fuel) for four decades because it was too “dirty” a fuel (insert obligatory joke here), although GENeco has been able to remove CO2 that would otherwise be problematical in an economical enough way to allow its use in vehicles. The company’s web site explains their expertise in such matters. “Part of the Wessex Water group of companies, GENeco has the resources, experience, skills and financial strength to offer secure, long-term commitment to businesses, organisations and the agricultural sector looking to become more environmentally friendly. “Generating around 35GWh of electricity a year, with the exception of landfill gas, we are producing more electricity than all the other forms of renewable energy combined in the region we operate, which includes Dorset and the former …
Smart Skies Down Under
Mr Richard R. Glassock holds a Bachelor’s degree in Mechanical Engineering with honors, and supervises undegraduate unmanned aerial vehicle projects at Queensland University of Technology (QUT) with the Australian Research Centre for Aerospace Automation (ARCAA). He currently leads the “Smart Skies” unmanned aerial systems flight-testing program and is working on his Master’s Thesis. At the Twenty-Fourth Bristol International Unmanned Air Vehicle Systems Conference, in 2009, Bristol United Kingdom he presented a detailed paper on a parallel hybrid system using off the shelf model aircraft components he and his associates designed and tested. “Multimodal Hybrid Powerplant for Unmanned Aerial Systems (UAS) Robotics” shows the use of an OS 10 cc model airplane engine, combined with a Plettenberg 220 motor. His group found that climb rates of the combined powerplants were improved 56 percent over that for an internal-combustion engine only, and that endurance increased by 13 percent, based on the combined efficiencies of the hybrid components. Richard is a regular reader of …
Solar Cells – All That Glitters Need Not Be Gold
The search for less expensive solar cells drives many lines of research these days, with trends toward smaller collectors and less expensive materials leading the way. Many solar cells use gold and other pricey metals to provide junctions within the cell structure. Gold closed Friday at $1,204.00 per troy ounce on the London Metal Exchange, and nickel at $10.01 per pound. That would make gold worth $17,558 per avoirdupois pound (14.583 troy ounces per pound), or 1,754 times more expensive than nickel. According to Gizmag, University of Toronto investigators found that substituting nickel for the previously used gold as collection contacts in their colloidal quantum dot solar cells provided equal performance, at a 40 to 80-percent drop in solar cell prices. Following that math, current pricing of solar cells such as Ascent’s thin film units at $6.00 per Watt could drop to $2.40 to $1.20 per Watt; near the $1.00 per Watt goal many cell makers have long sought. …
LEAP Awards at WSEA
At the World Symposium on Electric Aircraft, AirVenture’s overview of electric aircraft progress, the morning session ended with the presentation of the LEAP (Lindbergh Electric Aircraft Prize) awards. Erik Lindbergh, grandson of Charles and Anne Morrow Lindbergh and founder of the Creative Solutions Alliance, announced the winners at the July 30 session. According to the Alliance’s press release, “LEAP is a suite of prizes that recognizes significant contributions to the development of practical electric flight, and stimulates meaningful advances in the fledgling electric aircraft industry. LEAP awarded a total of $25,000 in prize money, an amount equal to the Orteig prize that was won by Charles Lindbergh for his 1927 solo crossing of the Atlantic Ocean. In doing so, Charles Lindbergh changed the world’s perspective about the potential for aviation and opened the door for today’s $300 billion dollar aviation industry.” Three prizes were awarded. The award for “Best Electric Aircraft: Awarded for the best example of a practical electric aircraft …
Hanging on The Prop, Backwards
Burt Rutan, as part of his keynote address at the World Symposium on Electric Aircraft, “’mused about electric-powered aerobatic aircraft whose reversible motors would enable them to deliver symmetric or asymmetric thrust as called for by each maneuver,’” according to the Experimental Aircraft Association’s news release by James Wynbrandt. “’Imagine an Oshkosh air show where [the planes] dive straight toward the ground and stop,’” Rutan said. ‘They’re not fantasy anymore. The RC [radio-controlled model] indoor guys are doing this. “’It’s happening. It’s easy to do.’” Video proof of Rutan’s assertion can be found on YouTube. The Electric Tournament of Champions, held at Toledo, Ohio April 3rd and 4th, 2009 drew competitors from all over the world. As shown in the video, R. J. Gritter showed off his variable-pitch (obviously capable of reverse thrust) “foamie” type model, named for the light-weight closed-cell foam from which these little craft are made. Note also the pivoting wings. Gritter is not the first to accomplish reverse …
A New ERA For Helicopters
Sikorsky Aircraft introduced its electric Firefly at AirVenture 2010 this week, but other ways to achieve green aviation are also showing up at Oshkosh. Avimech International Aircraft introduced its Dragonfly tip-jet helicopter, powered by hydrogen peroxide. Besides turning brunettes into blondes, H2O2 has propulsive qualities, often functioning as part of a rocket fuel mix. Manufacturing cargo conversion systems for large passenger aircraft and providing aircraft support services, Tuscon, Arizona-based Avimech promotes the use of H2O2 as a green fuel, and the new helicopter as an example of “Environmentally Responsible Aviation.” Its simplicity is a major feature. Tip jet propulsion forces fuel from the tanks flanking the pilot through rotor-tip openings, where the fuel reacts with a catalyst, spinning the rotor and providing lift. Avimech claims that this simplifies operation and control of the small (220 pounds empty weight) chopper. Because there is no rotational torque, lift and autorotation supplied through “purely aerodynamic forces”, the pilot doesn’t have to use rudder …
Yuneec E430’s to Top Everest
According to FlightGlobal.com, two Yuneec International E430’s will attempt to fly in formation over Mt. Everest next January or February. This will be the first flight over the 29,029ft (8,848m) peak by electric aircraft, and will highlight, “The viability of electric-powered flight and Yuneec’s designs,” according to FlightGlobal, the web-based outlet for Flight International magazine. Their report includes this video interview with Pierre Hallet, the French distributor for Yuneec, and one of the pilots slated for the expedition. According to Hallet , the only modification to the aircraft will be the addition of a DUC variable-pitch propeller, presumably to provide optimized climb in the thin atmosphere. Aircraft will be shipped to Katmandu, where they will be assembled, then flown to a base camp about 50 kilometers (31 miles) from the base of the mountain. Once weather conditions are favorable, the two E430’s will climb over the mountain and glide back to base camp.
Sikorsky’s Project Firefly™ Electric Helicopter Demonstrator
Sikorsky Innovations, the technology development arm of Sikorsky Aircraft, revealed last week at the Farnborough International Air show and this week at AirVenture 2010, the Firefly™ Technology Demonstration Aircraft, the first all-electric helicopter. Based on an S-300C, the electrified version replaces the original Lycoming drive train with a U.S. Hybrid power package consisting of a 200 horsepower electric motor, motor controller, and 1,100-pound lithium- battery from Gaia. To monitor operations and “the health” of the craft, Sikorsky has installed an LCD display in the modified center console. One benefit of electrified helicopters would be the discarding of the traditional complex series of mechanical links between the main rotor power takeoff and the tail rotor. The tail rotor on Firefly can be powered by small electric motor linked to the main rotor’s speed output signal. The battery pack’s high weight will allow only 15 minutes of flight at first. “Our objectives with Project Firefly are to provide a proof of principle …
Yuneec Adds to Airplane, Motor Lineup
Shanghai-based Yuneec, already promoting a line of electric paramotors, an electric trike, the two-seat E430, unveiled at last year’s AirVenture, and a series of motor/controller/battery combinations, has added to their offerings at AirVenture 2010. New craft include two aircraft, the Apis 2 and Viva from Martin Wezel Flugzeugtechnik, a German designer and purveyor of sailplanes and light sport aircraft. The Apis 2 is a derivation of the Silent electric sailplane, and in this application will be powered by a Yuneec motor system. The Viva, a two-seat motorglider, was designed originally for an HKS-700E two-cylinder engine of about 60 horsepower, and will be converted, like the Apis, to Yuneec power. Spanning 15 meters (49.2 feet), the Apis 2 has a best lift-to-drag ratio of 39:1 at 95 kilometers per hour (59 miles per hour). Normally fitted with a Hirth F33 two-stroke engine of 27 horsepower, the sailplane is self launching and carries 14 liters of fuel, enough for about an hour-and-a-half of …