Rockets

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Across
  1. 3. ups
  2. 4. press
  3. 6. flow
  4. 7. Robert H. Goddard doctor
  5. 10. newton2
  6. 12. turb....
  7. 13. speed
  8. 14. lift
  9. 16. von braun german
Down
  1. 1. newton1
  2. 2. newton3
  3. 4. of gravity center
  4. 5. up
  5. 8. title
  6. 9. propel
  7. 11. grenades
  8. 15. pulling