the.com/spacecraft engineering
building machines that must work perfectly the first time, forever, alone.
means the discipline of designing vehicles to survive launch, vacuum, radiation, and silence while doing their job with zero on-site repairs.
from grew out of aeronautics and rocketry in the 1940s-50s, when german v-2 engineers and cold war rivals realized flying to space needed a whole new rulebook beyond flying through air.
no repairsmost failures are permanent, so redundancy replaces maintenance
margin obsessionengineers triple-check math nasa calls it derating
thermal extremesone side can hit 250f, the other minus 250f
mass taxevery added gram costs thousands in fuel
for instance
voyager 1 — launched 1977, still transmitting from interstellar space
apollo guidance computer — 1969, less power than a calculator, landed men on the moon
james webb telescope — 2021, unfolded itself perfectly a million miles from earth
mars curiosity rover — 2012 skycrane landing, no human hands within 140 million miles