Electric airplanes are getting more numerous, with the latest making its initial flight in Augsburg, Germany. The Elektra One, developed by Calin Gologan of PC-Aero, was flown by test pilot Jon Karkow. Since that flight, the aircraft has completed an additional three flights for up to 30 minutes. It will next be upgraded with a variable pitch prop and retractable landing gear. Karkow was the project leader and test pilot for the around-the-world Virgin Global Flyer, and more recently served as technical program manager for the Virgin Galactic commercial space program at Scaled Composites in California. The single-seat Elektra One...