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hypersonic during launch phase only, at the target it's more like Mach 3.5 if we're talking about Kinzhals downed by Patriot some months ago
34 0 ReplyTIL hypersonic is genuinely a distinct word from supersonic.
22 1 ReplyIt's usually over mach 5, but originally it was used to refer to when you start needing to deal with heating up the air.
23 0 ReplyAlso around the point where jet engines kinda just stop working right.
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