Why is there no helicoptor with a single rotor?

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Homework Help Overview

The discussion revolves around the design of helicopters, specifically the mechanics behind rotor systems and the reasons for the prevalence of multiple rotors in helicopter designs. The subject area includes concepts from physics such as rotational motion, energy, and momentum.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the necessity of multiple rotors to prevent spinning, question the physical quantities involved in rotor motion, and consider the implications of energy and momentum in helicopter design.

Discussion Status

The discussion is ongoing, with participants raising questions about the physical principles at play and exploring the relationship between rotor motion and the helicopter's stability. Some guidance has been offered regarding the nature of the forces involved, but no consensus has been reached.

Contextual Notes

Participants are considering the implications of rotational motion and its effects on helicopter stability, with hints suggesting a need for deeper exploration of the underlying physics concepts.

amberlyp
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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:
 
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To prevent the helicopter from spinning in circles, I believe.
 
i think i have to relate it to energy and momentum and all that great stuff...
 
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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