Sun Flyer 2 Takes To The Sky Towards the end of March JetForums.com alerted you of plans for the upcoming first flight of the all-electric Sun Flyer 2 by BYE Aerospace. Since then the electric aircraft has made its initial test flight. The aircraft had registration N502SF. The first flight was initiated on April 10th and took off from Centennial Airport outside Denver. The first flight did not commit to any extreme maneuvers as most first flights. "As with most first flights, we’re not trying to test any limits at this stage, said founder and CEO of Bye Aerospace, George Bye.