The Republic F-105 Thunderchief was the first supersonic tactical fighter-bomber developed from scratch. Apart from being the biggest single-seat, single-engine combat aircraft in history, the F-105 was notable for its large internal bomb bay and unique swept-forward engine inlets in the wing roots. The wing was highly swept and incorporated low-speed ailerons and high-speed spoilers for lateral control, and a droop-snoot leading edge.