Meanwhile at Sonoma!
Monday morning, September 26, many of us had our first view of an electric airplane in flight.
After the weighing team rolled Jim Lee and Jeff Shingleton’s Phoenix motorglider from the hangar onto its impound location and completed initial weigh-ins for the remaining three aircraft, the airplanes were staged for the first flying event of the Green Flight Challenge sponsored by Google.
With technical inspections and weighing completed, the four airplanes lined up to check their noise levels and their ability to clear an imaginary 50-foot barrier atop a cherry picker 2,000 feet from the top of the number “9″ on runway 19 at Santa Rosa, California’s Charles M. Schulz Sonoma County Airport. As each aircraft rolled out to their takeoff point, the cluster of photographers under the cherry picker focused and waited for a green flag to fall at the takeoff point.
Top of flag marks 50-foot level
All the aircraft passed cleared the 50-foot flag, and e-Genius was judged to be quietest of the entrants after it took a second run. Its first had been marred by the noise of a Cessna allowed to take off on an adjoining runway. Although sound level results have not been announced, it was noted that e-Genius, even with the intruding sound, was a whisper-quiet 4 decibels quieter than the nearest competitor, the Pipistrel G4.
Even the Rotax-powered machines acquitted themselves admirably, being notably quieter than the more traditional light aircraft on the field.
As Monday’s efforts came to a close, all competitors could be happy with their quiet, but high-performance machines.
More at.
Green Flight Challenge – Day Two
EAA News - e-Genius, Pipistrel Contend for GFC Prize
Charlie