Gyroscopic effect on tilting rotor?

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Discussion Overview

The discussion revolves around the forces and torques involved in tilting a rotor in a rotorcraft design, specifically focusing on the behavior of a rotor modeled as a rigid disc. The context includes considerations for gyrocopters and the mechanics of rotor tilting.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks to understand the forces required to tilt a rotor and describes the rotor as a rigid disc with a ball-socket joint allowing for tilting in any direction.
  • Another participant mentions the moment of gyration, suggesting that the force needed to tilt the rotor depends on its moment of inertia and angular velocity.
  • A different participant questions the necessity of a tilting rotor in rotorcraft design, asking for the purpose behind it.
  • One participant recommends searching for terms related to gyrocopters and various rotor designs, suggesting that consulting experts may provide further insights.

Areas of Agreement / Disagreement

Participants express differing views on the necessity and mechanics of tilting rotors, with some focusing on technical calculations while others question the design rationale. The discussion remains unresolved regarding the specific forces and behaviors involved.

Contextual Notes

There are limitations in the discussion, such as the lack of detailed mathematical derivations and assumptions regarding the rotor's dynamics. The scope is also restricted to the mechanics of tilting rotors without delving into broader rotorcraft design principles.

wisemo
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Hello folks
I've been a little confused - I'm currently designing a rotorcraft but I need to be able to predict the force (or torque) I'd need to tilt the rotor.

What I've done is model the rotor as a simple rigid disc. I've attached the diagram below. what sort of behavior would I get during trying to tilt it in any direction? Please note that the pivot is a ball-socket joint and so it's able to tilt in any direction.

Thank you
 

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Have a look at the moment of gyration; http://en.wikipedia.org/wiki/Radius_of_gyration

The amount of force required to tilt the rotor will be based on its moment of inertia and angular velocity.

But why would you build a rotor craft with a titling rotor? Whats the point?
 
That link simply tells me how to calculate the radius of gyration. Nothing about moments.
What I'm working on is a gyroplane - hence the requirement for tilting.

Thanks :)
Mo
 
 

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