 Instead, after confirming "Runway two-two", Captain Clay taxied onto Runway 26, an unlit secondary runway only long, and turned the controls over to First Officer Polehinke for takeoff.The air traffic controller was not required to maintain visual contact with the aircraft; after clearing the aircraft for takeoff, he turned to perform administrative duties and did not see the aircraft taxi to the runway.Based upon an estimated takeoff weight of , the manufacturer calculated that a speed of and a distance of would have been needed for rotation (increasing nose-up pitch), with more runway needed to achieve lift-off.