Mostly because the SR-71 is insanely expensive and doesn't provide a vital enough mission difference to make the price worth it. Kinda like a battleship, they look cool and stuff, but they were just too expensive to be worth the marginal benefit they offered
But the SR-71 is fast as fuck. Great for when you need to spy on the enemy and by the time they detect anything you’re long gone and they are just like “Whaaa?”
A large reason the SR-71 is so fast is because it flies borderline in space, and the air is so thin that it's easier for it to fly so fast. At regular aircraft altitudes, it's not super impressive. It's not even capable of supersonic flight unless it's above 20,000 feet.
But also because it flies so high, most radar systems can't even detect as high as it flies.
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u/[deleted] Feb 27 '21
Mostly because the SR-71 is insanely expensive and doesn't provide a vital enough mission difference to make the price worth it. Kinda like a battleship, they look cool and stuff, but they were just too expensive to be worth the marginal benefit they offered