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SESK: Stuff Everyone Should Know · sesk.info/aero-x-prize-repeat-flight

What repeat-flight rule made the X-Prize especially challenging?

Repeat the spaceflight within two weeks.

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  1. Fly again within two weeks ✔
  2. Remain in orbit for one year
  3. Launch from three continents

Why: The same vehicle had to reach the required altitude twice within two weeks. This tested rapid reuse, not just a one-time achievement.

Huh, didn't know that: Each qualifying flight also had to carry the weight of three adults.

The dad joke
The spacecraft liked the first flight so much it asked for a quick sequel.
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References

Answer: Fly again within two weeks. The same vehicle had to reach the required altitude twice within two weeks. This tested rapid reuse, not just a one-time achievement.

  1. Aerospace Dimensions Module 4, Rockets akwg.cap.gov/media/cms/Module_4__Rockets_6660F78F20B68_4ad77.pdf
    within a period of 2 weeks, the same flight would have to be repeated
    Checked 2026-10-10.

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