Comments by "Chrysippus" (@4.0.4) on "Titanium - The Metal That Made The SR-71 Possible" video.

  1. "It's really expensive" >Only 3x as expensive as aluminum
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  2.  @LetztezBatallion  that makes sense, the tooling and material waste mentioned in the video + sourcing the titanium at that time could only be justified by espionage
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