Comment on People who do not specify units of measurement in international contexts

• TIEPilot@lemmy.world ⁨2⁩ ⁨months⁩ ago

  Aerospace

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  • holy_scroller@lemmy.zip ⁨2⁩ ⁨months⁩ ago

    My last project in aerospace with 100’s of people was mostly Imperial. There is a lot of mixing of units and you can basically design your subsystem however you want. There was a mandate decades ago to go metric, but that has largely been ignored. It’s the worst of both worlds!

    My current project is just a couple people, so I mandated all metric. I have to spend a lot of money on tooling, but it is largely fine. I would say 10 years ago getting some fancy aerospace grade fasteners was easier in Imperial, less so today.

    My mind still defaults to Imperial for very small dimensions like a 8 thou gap or something.

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    • FuglyDuck@lemmy.world ⁨2⁩ ⁨months⁩ ago

      Didn’t that happen because of the Mars Climate Observer crashing? Caused by a us team using pounds-force-seconds where nasa expected newton-seconds (sending it hurtling towards mars at a too-low dip into the atmosphere)

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    • TIEPilot@lemmy.world ⁨2⁩ ⁨months⁩ ago

      30+ years satellites, we are all metric. But as @FuglyDuck said it was a mixed team that mixes SAE\Imperial and metric that caused the failure.

      We do everything in house so when parts\waveguide\antenna’s\etc all gets ordered its all metric.

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      • holy_scroller@lemmy.zip ⁨2⁩ ⁨months⁩ ago

        A lot of duel dimensioned drawings when you are interfacing.

        I just have to be able to convert back and forth, sometimes in a single sentence: “we are using a 500mm X 450mm base made from 1/16” sheet metal."

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