Across
- 2. da Vinci's flying machine flapped like a
- 3. birds create lift and what by flapping their wings
- 9. first person to man a hot air balloon
- 10. a wing shape that when moved through a fluid (air) produces an aerodynamic force
- 11. this heats the inside of the balloon causing it to rise
- 13. hot air balloons rise because warm air becomes _____ dense
- 14. wind tunnels are used to test aircraft and
- 15. The buoyant force on a submerged object is equal to the _____ of the fluid that is displaced by the object
- 16. this and density illustrates the mechanics of a hot air balloon
- 21. the wright bros included a rudder on their airplane t0 prevent it from _____ out of control
- 22. Airfoil where the upper surface is more curved. The mean camber line is above the chord line
- 24. Straight line that connects the leading edge (most forward point) to the trailing edge (most rear point).
- 26. The line drawn between the leading and trailing edge so that the distances between the upper
- 28. lower ______ on top of the wing creates lift.
- 30. when the 4 forces of flight are balanced
- 31. The length between the ends of the wingtips
- 32. The shape of the airfoil when viewing from above
Down
- 1. He described the underlying principles and forces of flight
- 3. Maximum distance between the upper and lower wing surfaces
- 4. bird part that resembles the propeller
- 5. escaped from prison using wings made of feathers and wax
- 6. Last edge air makes contact with the airfoil
- 7. First edge air makes contact with the airfoil.
- 8. aircraft that doesn't depend on an engine
- 11. The ability or tendency to float in air, in water, or some other fluid
- 12. in Bernoulli's Principle a low pressure is created on ____ of the wing creating lift
- 17. lower surfaces are equal
- 18. the camber of an airfoil refers to it's
- 19. to descend a hot air balloon you allow air to escape through this
- 20. The main parts of a hot air balloon are the basket, burner, and ________
- 23. type of aircraft that performs best with a symmetrical airfoil
- 25. when the air in a balloon is warmed the density of the air _______ causing it to rise
- 27. Some people are convinced that this man beat the Wright Brothers to the first
- 29. Wright bros and da Vinci based their theories from watching _____ fly