Denel (Atlas) Cheetah Strike Fighter Aircraft
When introduced in 1986, the South African Atlas-Denel Cheetah represented the most comprehensive upgrade of the earlier French Mirage III series fighters.
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The Denel (formally Atlas) Cheetah came about from a South African Air Force requirement to update or replace its series of aging frontline fighters as its bordering neighbors were receiving updated Soviet Bloc aircraft at the time. Unfortunately for South Africa, a blanket Western arms embargo limited the options available and, as such, the decision was made to modify existing SAAF Mirage III series aircraft (of French design) to a new modern standard. The end result would be what many experts have considered the "definitive" evolution of the Mirage III family as a whole - the South African initiative producing the Atlas (now Denel) "Cheetah C" fighter. For all intents and purposes, the Cheetah C is regarded as a comparative to the McDonnell Douglas / Boeing F-15 Eagle air superiority fighter.
It is widely believed that the South African Atlas concern received some level of assistance (at least initially) from IAI of Israel for two distinct reasons - 1) South Africa and Israel enjoyed a particularly close relationship during this time and 2) Israel had already garnered intimate experience in upgrading their own French Mirages through the indigenous Israeli "Kfir" fighter endeavor. This participation no doubt supplied a strong understanding when bringing about the new standard for the South African Mirage III. As such, the SAAF aircraft sports various proven Israeli elements as advanced avionics, all-digital systems and quality physical design changes to the airframe (the forward canards for example).
Though retaining roughly 50 percent of the existing Mirage III airframe, the Cheetah basically evolved into an "all-new" aircraft and appeared in a few variants made distinguishable by the identified single-seat or twin-seat derivatives. A fixed in-flight refueling probe was also added to the design for essentially unlimited operational ranges as was the inclusion of additional underfuselage hardpoints (wingtip hardpoints were trialled successfully for the Mirage IIIR2Z which would have become the "Cheetah R" dedicated reconnaissance platform but these never put into production). Higher rated engines were also added to the mix.