Klaus Ohlmann says the sailplanes and solar-powered aircraft in which he has set several world records are powered by a “gravitational engine with an external fusion reactor.” He has been on a sun-stoked roll the last few years. His recounting of the epic journey first to fly a Stemme motorglider from Germany to Katmandu, and then to conquer Mount Everest in a sailplane, kept the eighth annual Electric Aircraft Symposium audience enthralled. That feat alone would be enough for admiration, but his seemingly never-ending series of adventures provoke a bit of awe. He is a member of the Mountain Wave Project (MWP), a group which explores high-altitude weather systems to verify theoretical considerations. As stated in the MWP’s web site, …