I don't understand some people in this forum, we need these fighter planes, the Russian ones suck, and the Chinese only sell the Russian clones to other countries which suck just as much. They don't sell the good fighters to others, otherwise they would have done it long ago.
Europe does not sell Eurofighters to us, Turkey is a bigger threat in their eyes than Iran & Co.
KAAN & Hürjet need at least 7-8 years to be competitive not only on paper, but also in an emergency, i.e. in absolute practice.
The F-4 Phantoms II Terminator are falling apart, they have long since reached their sell-by date.
Until KAAN, Hürjet, Kizilelma, Anka 3 really perform within the desired parameters to compete with F-35, Eurofighter & Rafaele it will take at least another 7-8 years.
Until then, we need a transitional period with almost 300 F-16 Block 70/Özgur + various HALE/MALE drones for the next 10 years.
We can't just eat steak every day, we have to eat other foods too.
The same applies to fighter planes, the F-16 is well known and the maintenance and servicing is cheap.
It's a versatile workhorse, the US uses more of their F16 Vipers, F18 Super Hornets & F-15 Strike Eagles on their war missions than their F-35s & F-22s which are just too expensive to operate....
and USA 
negotiated a deal for Patriot systems but couldn't come to an agreement on price and the United States was not comfortable selling Turkey the technology to manufacture domestically.
S-400 system, which developing members of the F-35 program (which included Turkey) viewed as a potential security threat to their new, front line, 5th generation fighter.
joining NATO to get USA 
.
