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Why Payload Power Budget Matters

A payload power budget is the document that stops a payload from being discovered to be unaffordable in flight.

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Overview

  • Budget by phase: take-off, transit, on-task, return — the peak is rarely where you expect.
  • Include the converter losses and the idle draw of every device, not only the ones doing work.
  • Keep a reserve for the platform's own systems and for cold-weather battery derating.
  • Re-do the budget whenever a payload is added, because it is the additions that break it.

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