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NASA's X-43A set a speed record using what kind of engine?

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  1. A turbofan
  2. A scramjet
  3. A piston engine

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References

  1. X-43A (Hyper-X), NASA www.nasa.gov/reference/x-43a-hyper-x Checked 2026-10-10.
  2. X-43A (Hyper-X), NASA www.nasa.gov/reference/x-43a-hyper-x Checked 2026-10-10.

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