Cambridge University researchers claim to have successfully demonstrated how several of the problems impeding the practical development of the so-called “ultimate” battery, in this case a lithium-oxygen unit, could be overcome. They make some pretty impressive claims, saying they’ve developed a working laboratory demonstrator with “very high” energy density – comparable to that of gasoline and with greater than 90-percent efficiency, and the ability to be recharged more than 2,000 times, or 5-1/2 years with a complete cycle and recharge every day. A lithium-oxygen or lithium-air battery of this type would allow an uninterrupted drive between London and Edinburgh on a single charge, about 415 miles, over 100 miles greater than the top mileages promised by Tesla and GM at this point. Researchers add the promise of one-fifth the cost and one-fifth the weight of currently available batteries – a touchstone for electric aircraft designers, and close to the goals U. S. Energy Secretary Steven Chu asked for three years …
The Sixth Annual Electric Aircraft Symposium
The CAFE Foundation will hold its sixth Electric Aircraft Symposium on April 27 and 28, 2012 at the Flamingo Resort in Santa Rosa, California and at the Charles M. Schulz Sonoma County Airport, site of the Green Flight Challenge. Not only will there be a stellar lineup of speakers, but flying demonstrations of electric and hybrid aircraft, a first at any EAS. Jack Langelaan, team leader for the GFC-winning Electro Taurus G4 team, and Tine Tomazic from Pipistrel will share insights on the design and flight of the 403.5 epmpg aircraft. David Calley, Chief Technical Officer for Motor Excellence, will describe ideal low-RPM motors for electric aircraft, and Mark Moore from NASA’s Langley Research Center will share breakthroughs in distributed propulsion. And that’s all before the first coffee break! Typical of the packed schedules for all EAS’s, the rest of the presentations will fill your brain and lighten your spirit. Gene Sheehan will discuss his Quickie-like Feuling Green Flight Challenger …