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Why is there no helicoptor with a single rotor?

  • Thread starter amberlyp
  • Start date
6
0
All helicopters have two rotors. Some have both rotors on vertical axes but rotating in opposite directions, and the rest have one rotor on a horizontal axis perpendicular to the helicopter body at the tail. Why is a single rotor never used? :frown:
 

Answers and Replies

cepheid
Staff Emeritus
Science Advisor
Gold Member
5,183
35
To prevent the helicopter from spinning in circles, I believe.
 
6
0
i think i have to relate it to energy and momentum and all that great stuff....
 
cepheid
Staff Emeritus
Science Advisor
Gold Member
5,183
35
okay. What physical quantity does the motor "impart" to the rotor? (Hint: it puts it into rotational motion right? So how is that measured as a "quantity?") If so, does an equal and opposite amount of this quantity get "imparted" back to the helicopter?
 

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