 The XF4H @-@ 1 was designed to carry four semi @-@ recessed AAM @-@ N @-@ 6 Sparrow III radar @-@ guided missiles , and to be powered by two J79 @-@ GE @-@ 8 engines . As in the McDonnell F @-@ 101 Voodoo , the engines sat low in the fuselage to maximize internal fuel capacity and ingested air through fixed geometry intakes . The thin @-@ section wing had a leading edge sweep of 45 ° and was equipped with blown flaps for better low @-@ speed handling . 
