Alternative energy

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Across
  1. 1. generated by touch to touch
  2. 4. airfoil doesn't vary with lift
  3. 8. attraction of weight to earth
  4. 9. force which moves an aircraft
  5. 10. to keep something flying straight
  6. 11. the body of an aircraft
  7. 13. maximum extent across an aircraft
  8. 14. power an object possesses
Down
  1. 2. a vertical airfoil pivoted stablizer
  2. 3. a point representing the mean
  3. 5. power stored when its strained
  4. 6. renewable power, to save resources
  5. 7. to rise off the ground
  6. 12. power held by an object