Principles of flight rotary

Home > Preview

The flashcards below were created by user Anonymous on FreezingBlue Flashcards.

1. Helicopters are capable of flight in what 5 manuevers?
• Forward
• backward
• sideways
• hover
• vertical
2. The primary airfoil of the helicopter is ?
Main rotor
3. Unlike fixed wing , the main rotor produces both____ and _____.
Lift and thrust
4. The span of the rotor blade is the distance from ____ to _____.
Root to tip
5. The chord is the distance from _____ to ______.
Leading edge to trailing edge
6. The shape of the airfoil affects its________.
Flight characteristics
7. Many helicopters use a _______ airfoil
Symmetrical
8. The _______ airfoil has the same curvature top and bottom
Symmetrical
9. The ______ is the direction of the airflow with respect to the blade?
Relative wind
10. If the blade moves forward horizontally , the relative wind moves ______ horizontally
Backward
11. The rearward moving blade is the ______ blade
Retreating
12. The forward moving blade is the _____ blade
13. Relative wind can be affected by 4 things?
• movement of the rotor blades
• horizontal movements of the helicopter
• flapping of the rotor blade
• wind speed and direction
14. The pitch angle is the acute angle between the rotor blade ______ and the _____ plane
chord , reference
15. Movement of the _____ changes pitch angle
Collective
16. The pitch angle is often confused with ?
Angle of attack
17. The angle of attack is the acute angle between the _____ of the airfoil and the _______
chord , relative wind
18. The angle of attack is dependant on the _________ and the ______ angle
Relative wind , pitch angle
19. Lift is the force produced by the airfoil that is perpendicular to the ______ and that opposes _____
relative wind , gravity
20. The force that tends to resist the airfoils passage through the air?
Drag
21. Drag varies as a square of the________?
velocity
22. The _______ is an imaginary point where the result of all the aerodynamic forces of the airfoil are considered to be concentrated.
Center of pressure
23. Movement of the ______is common on most airfoils
Center of pressure

Card Set Information

 Author: Anonymous ID: 113596 Filename: Principles of flight rotary Updated: 2011-11-01 06:21:53 Tags: AME aircraft maintenance engineer helicopter Folders: Description: AME aircraft maintenance engineer helicopter Show Answers:

What would you like to do?

Home > Flashcards > Print Preview