SolarStratos, a two-seat, solar-powered airplane, is being readied for record flights in Yverdon-les-Bains, Switzerland, just a 25-minute drive from the Solar Impulse hangars in Payerne. Its makers claim that it is the first commercial solar two-seater aircraft in history, and will be the first solar-powered airplane with a pilot to enter the stratosphere. These heady claims are described on the project’s web site as a “crazy bet,” but it’s too early to make such judgments. Calin Gologan of PC-Aero GmbH designed the base craft, an expansion of his earlier ultralight electric aircraft, Elektra Two. The “Record” version of this craft, despite SolarStratos’ extended 20-meter (65 feet, 7 inch) wingspan, weighs a feathery 140 kilograms (308 pounds) empty, and only 350 kilograms (770 pounds) loaded, including 80 kilograms (176 pounds) of batteries and 20 square meters (215.28 square feet) of thin-film solar cells set into the wing and horizontal tail surfaces. With a span loading of only 11.7 pounds per foot, …
Green Flight Challenge Competitors Come Together on Perlan Project
The Cafe Foundation’s Green Flight Challenge, scheduled for 2011, has drawn some impressive competitors with its $1.5 million prize. Two of these, Greg Cole of Windward Performance, who will field a two-seat motorglider, and Einar Enevoldson, leader of the PC-Aero team, which will launch its Elektra One (see “PC-Aero’s Elektra One,” April 11, 2010), are working together quite collegially on a challenge of their own. Before his death in 2007, adventurer Steve Fossett, with co-pilot Enevoldson, had set the sailplane world altitude record in Perlan I, a modified Glaser-Dirks DG-500. In a continuation of that ambitious adventure, Einar, Greg, and Project Manager Morgan Sandercock are creating Perlan II, a pressurized sailplane that will explore the realm of the nacreous, or ‘mother of pearl” cloud (“perlan” is Icelandic for “pearl”), a shimmery mix of water vapor and other exotic chemicals in the polar vortex at 50,000 to 90,000 feet. Their flight will not only set a world’s sailplane altitude record, but …