The incentive for creating the giant 747 came from reductions in air fares, a surge in air-passenger traffic and increasingly crowded skies. Following the loss of the competition for the gigantic military transport, the C-5A, Boeing set out to develop a large advanced commercial airplane to take advantage of the high bypass engine technology developed for the C-5A. The design philosophy behind the 747 was to develop a completely new plane, and other than the engines, the designers purposefully avoided using any hardware developed for the C-5.