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Auxiliary Power Units

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Auxiliary Power Units

Auxiliary Power Units

Auxiliary Power Units

  • Download
  • <iframe src="https://www.npr.org/player/embed/961896/961897" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Troubleshooters are expected to scrutinize the shuttle Columbia's auxiliary power units, which help provide power to the orbiter's steering mechanisms during descent — a task that requires highly flammable fuel. NPR's Howard Berkes joins host Steve Inskeep to talk about the role APUs play in reentry and why their redesign had been on NASA's to-do list. (This is a repeat from earlier in the show.)

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