Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Rotary-Wing Systems

Rotary-Wing Flight Control Systems

QuestionAnswer
What are the advantages of the helicopter over conventional aircraft? The lift and control are relatively independent of forward speed.
What are the main differences between the rotary-wing and fixed-wing aircraft? The fixed-wing aircraft gets its lift from a fixed airfoil surface.
What provides lift for a helicopter? Rotating airfoils called rotor blades.
What does the word helicopter mean? It comes from Greek words meaning helical wing or rotating wing.
What is known as the rotor disc area? The area of the circle, the radius of which is equal to the length of the rotor blade. (Engineers determined that the lift of a rotor is in proportion to the square of the length of the rotor blades).
What happens if the rotor is operated at a zero pitch (flat pitch)? No lift will develop.
How is the lift distribution evened out along the length of the rotor? It is common practice to twist the blade.
Why should rotor blades be polished to a mirrorlike surface? By making the rotor blades as smooth as possible, the parasite drag is reduced.
In formulas for lift and drag, why is the density of the air an important factor? The mass or density of the air reacting in a dwonward direction causes the lift that supports the helicopter.
What two factors is density dependent upon? Altitude and atmospheric changes.
What is the usual method of counteracting torque in a single main rotor? By a tail (antitorque) rotor.
Where is the auxiliary rotor mounted? It mounts vertically, or near vertical, on the outer portion of the tail boom.
What is dissymmetry of lift? The difference in lift existing between the advancing blade half of the disc and the retreating blade half.
How is rotor blade dissymmetry created? By the horizontal flight or by the wind when the helicopter is hovering.
Created by: bway
Popular Aviation sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards