 The USN operated the F4H @-@ 1 ( re @-@ designated F @-@ 4A in 1962 ) with J79 @-@ GE @-@ 2 and <unk> engines of 16 @,@ 100 lbf ( 71 @.@ 62 kN ) thrust and later builds receiving -8 engines . A total of 45 F @-@ 4As were built and none saw combat and most ended up as test or training aircraft . The USN and USMC received the first definitive Phantom , the F @-@ 4B which was equipped with the Westinghouse APQ @-@ 72 radar ( pulse only ) , a Texas Instruments AAA @-@ 4 Infra @-@ red search and track pod under the nose , an AN / AJB @-@ 3 bombing system and powered by J79 @-@ GE @-@ 8 , <unk> and <unk> engines of 10 @,@ 900 lbf ( 48 @.@ 5 kN ) dry and 16 @,@ 950 lbf ( 75 @.@ 4 kN ) afterburner ( reheat ) with the first flight on 25 March 1961 . 649 F @-@ 4Bs were built with deliveries beginning in 1961 and VF @-@ 121 Pacemakers receiving the first examples at NAS Miramar . 
