McDonnell Douglas F-15 Eagle

The McDonnell Douglas F-15 Eagle has long been considered one of the most successful dog-fighting aircraft in US history with an undefeated air-to-air combat record with more than 100 aerial combat victories, according to Boeing.

The entire F-15 fleet was due to be replaced with the fifth-generation F-22 Raptor but only 188 of the 749 F-22s purchased by the Pentagon were ever produced.
Now a $12 billion upgrade is underway for the US Air Force’s 1980s-era F-15 fighters.  The upgrade will cover 435 F-15's and will include new radar technology, updated mission computer systems and modern communication tools.  In addition, an advanced infrared search and track capability and electronic warfare defenses will be incorporated so the F-15's can work in concert with more advanced aircraft including the F-22 Raptor and F-35 Lightning II.

The upgrades will allow the F-15 Eagle to carry up to 16 missiles rather than the standard 8.  The upgrades will extend the F-15 lifespan through 2040.  The F-15 Eagle has a maximum speed at high altitude of Mach 2.5+ (1,650+ mph, 2,665+ km/h) and Mach 1.2 (900 mph, 1,450 km/h) ay low altitude.