The Lockheed YF-12 is an American prototype interceptor aircraft evaluated by the United States Air Force in the 1960s. The YF-12 was a twin-seat version of the secret single-seat Lockheed A-12 reconnaissance aircraft, which led to the U.S. Air Force's Lockheed SR-71 Blackbird twin-seat reconnaissance variant. The YF-12 set and held speed and altitude world records of over 2,000 miles per hour (3,200 km/h) and over 80,000 feet (24,000 m) (later surpassed by the SR-71), and is the world's largest manned interceptor to date.[2] After retirement it served as a research aircraft for NASA, which used it to develop several significant improvements in control for supersonic aircraft, including the SR-71.-Wikipedia
Controls:
Standard flight controls
Ag1: main engine
Ag2: afterburner (pitches nose down violently at first, then raises nose at over 1700mph) recommend using only over 40000 ft for more realistic speed and only use at the same time with main engines for unrealistic high speed

Takeoff:
Ag1, full trim, full throttle until 240ish then pitch up and raise gear. I prefer to light the burners over 1000ft

Landing:
Deactivate afterburners, slow to under 300, main engines throttled to 5%. Manage pitch by using the trim slider

So I maybe made the engines too powerful. Sorry for the lack of realism with afterburners. Enjoy the extra speed!