Extreme speed and the plasma around a re-entering weapon are described as complicating radar returns, communications and sensitive electronics. The explanation considers increasingly distorted radar information and a growing need for shielding. Slowing in the terminal phase can help guidance, although it also makes interception easier where defensive missiles can reach the weapon. Briefly reaching a very high speed is distinguished from maintaining it for most of the journey. The technology is compared with aviation around 1912, when its possibilities were visible but later capabilities had yet to mature. A counterfactual 1939 Fairey Swordfish sent back to 1914 illustrates the difference: it is imagined as a reliable torpedo bomber able to attack the German fleet beyond the reach of contemporary fighters. Large wars also depend on production. A sufficiently capable weapon available in quantity can be more useful than an exceptionally capable but expensive system.
Notable Point · 4:48:50-4:57:42
Guidance and production limits on hypersonic missiles
Sustained hypersonic flight complicates sensing, communications, and terminal guidance, while slowing for accuracy gives defenders a more manageable target.