Boeing Adds Solar Winglets to Its Solar High-Flyer

Dean Sigler Solar Power, Sustainable Aviation 0 Comments

Despite having a wing, horizontal tail, and fuselage top full of solar cells, Solar Impulse 2 needs long days and short nights to make it through the dark periods between recharging.  Even Eric and Irena Raymond’s SunSeeker Duo, a more practical machine, performs only day-long flights so far. Part of this is the nature of sunlight and solar cells, both of which are limited in small areas.  Despite the fact that every hour, each square meter of the upper atmosphere receives 1.367kWh of solar energy, and National Geographic claims that “Every hour the sun beams onto Earth more than enough energy to satisfy global energy needs for an entire year,” it’s hard to harness that energy on a relatively small …

EAS IX: Aurora Flight Science Set Records without Pilots

Dean Sigler Diesel Powerplants, Electric Powerplants, Sustainable Aviation 0 Comments

John Langford, CEO of Aurora Flight Sciences, has been demonstrating autonomous aircraft for years – a fact he has shared with Electric Aircraft Symposium audiences several times.  This year he gave a brief history of Aurora, starting with the Sunlight Eagle, an adaptation of the Michelob Light Eagle, a human-powered aircraft that preceded the most successful long-distance flight by an HPA – the Daedalus with a 76-mile trip over the Mediterranean. The 2009 craft was originally powered with bicycle-like pedals and still holds four world records for human-powered flight. For its two test flights at Las Cruces International Airport, the pedals were replaced with solar panels, an electric motor, a high-performance battery, and a flight control system.  Even with all …