Navaleye has a point about the Skyhawks used by Argentina, while BomberH has a point about the USMC's A-4Ms.
The early A-4s had poor engines and ejection seats, while later ones had much better engines and ejection seats.
A-4B: 7,700 lb.s.t. J65-16; ESCAPAC 1 rocket-boosted ejector seat
A-4C: as above or 8,400 lb.s.t. J65-20; ESCAPAC 1A-1 low-level ejector seat
The Argentinian Skyhawks (both Fuerza Aerea and Comando de Aviación Naval) in the Falklands war were refurbished versions of these two, with engines and ejection seats unchanged.
A-4E*: 8,500 lb.s.t. J52-6A (later 9,300 lb.s.t. J52-8A); ESCAPAC 1 STENCEL MOD
A-4F**: 9,300 lb.s.t. J52-8A; ESCAPAC 1C-3 (later 1F-3) ejector seat
A-4M***: 11,200 lb.s.t. J52-408; ESCAPAC 1C-3 (later 1F-3) ejector seat
Argentina bought surplus A-4Ms in 1995 to replace those in the Fuerza Aerea, while the Comando de Aviación Naval no longer operates any Skyhawk model.
Singapore's A-4Ss were refurbished and modified A-4B/Cs with the J65-20.
These were modernized to A-4SUs by replacing the J65 with the 11,000 lb.s.t. F404-100D (non-afterburning).
* also Israeli A-4H
** also RAN A-4G & RNZAF A-4K
*** also Kuwaiti A-4KU & Israeli A-4N
Last edited by GreenKnight121; 16th Aug 2012 at 00:28.