Here’s why the MiG-25 Foxbat was never as fast as the SR-71 (and why Soviets never developed their own Blackbird) - The Aviation Geek Club

https://theaviationgeekclub.com/heres-why-the-mig-25-foxbat-was-never-as-fast-as-the-sr-71-and-why-soviets-never-developed-their-own-blackbird/amp/