Guy- The slotted slab was one of the mods necessary to compensate for the
longer nose and forward weight addition of the gun. A #7 fuel cell was
added in the tail cone to increase extreme aft weight and the fixed
slots were added to the tail plane to provide increased aerodynamic
downforce to counter the nose gun. BRBR


F-4J/S also had a slotted stab and tank 7-no gun tho..Hawg-10 was heavier than
the APQ-72 tho.

Inboard leading edge flaps were a maintenance nightmare. I think tank 7,
slotted stab, aileron droop, bolted up inboard LE flaps, all were running
changes to make the A/C better around the boat, as it got heavier.
P. C. Chisholm
CDR, USN(ret.)
Old Phart Phormer Phantom, Turkey, Viper, Scooter and Combat Buckeye Phlyer