Fixed wing aircraft

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Across
  1. 2. tail of an aircraft
  2. 4. force produced by a speedbrake
  3. 6. directional flight control
  4. 7. rear
  5. 9. center
  6. 11. when an A/C moves on the ground
Down
  1. 1. air sonar
  2. 3. speed of sound
  3. 5. A/C parking
  4. 8. force to push the A/C forward
  5. 10. force produced by wings
  6. 12. shape of a wing