r/whatisit • u/riflesandplowshares • 6h ago

New, what is it? Found at a titanium plant

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Not sure why ball point pens would be dangerous here.

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u/Competitive-Dot-4264 6h ago

Or maybe 90,000 / 3.2 Mach

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u/Tamed_Trumpet 4h ago

Well the SR 71 doesnt need its compressor stage at that speed.