Sunseeker Duo Plays Among the Alps

Dean Sigler Batteries, Electric Powerplants, Solar Power, Sustainable Aviation Leave a Comment

Eric and Irena Raymond took a lovely Sunseeker Duo flight over the Italian alps near their home in Voghera and edited it all into a video.  They designed and built their own solar-powered airplane – Eric’s third.  He flew Sunseeker 1 across the US in 1990 in 21 hops.  A big press conference scheduled for his last landing at Kitty Hawk, NC was a big disappointment since the US invaded Kuwait that day. Six Minutes of Great Beauty Their airplane has solar cells arrayed across the wing and horizontal tail, a small battery pack that gets recharged while flying in the sun, and a 22 kilowatt (30 hp) motor on the tail.  Turning off the motor they can soar on winds wafting up the sides of the mountains.  Beeping and electronic noises come from an audio variometer, a sensitive indicator of whether the airplane is climbing or descending.  All the sounds are ambient.  Note how quiet the airplane is, even …

72 Hours of Flight, Exercise, Rest, and Hypnosis

Dean Sigler Electric Powerplants, Sustainable Aviation Leave a Comment

The first Solar Impulse airplane, HB-SIA, has demonstrated repeatedly that it can stay up all day and all night.  The idea of perpetual flight has enticed designers for years, but the idea of a perpetual pilot has not – until the space age.  Charles Lindbergh had a restless night before his May 20, 1927 takeoff for Europe and spent much of the 33-1/2 hour flight battling his nearly overwhelming need for sleep.  A solar-powered flight will be considerably slower, and thus longer in duration, than Lindbergh’s epic voyage, however. With planned flights for HB-SIB, the second Solar Impulse craft, anticipated to span continents and oceans, the need for maintaining pilot health and alertness becomes imperative. As the team explains, “Over the several years Solar Impulse has proved that is its possible to fly with unlimited endurance. But as we know, Solar Impulse is more than a technical challenge. It is also about pushing human limits to new levels. “The Transatlantic …