How to Model a Hiller Flybar Mathematically?

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In summary, the conversation discusses the need for a physics model for a Hiller flybar in a model helicopter. The person has a basic understanding of physics and has been researching gyroscopes, but needs help with finding the center of inertia for the system. They suggest looking into a paper from the University of Toronto and also recommend checking out RC forums for more information.
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Need Physics model for Hiller system

Have been working on a model helicopter for some time and need to mathematically model a Hiller flybar. I have basic understanding of physics and have been researching gyroscopes to model the system, but still am missing a few bits and pieces. Have the Moments of Inertia figured out I think, but need to figure out the center of inertia for the system. Think that this will take the design above the principle axis. Can anyone help or direct towards a detailed tutorial?
 
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I must say you don't hear much about flybars any more unless you are talking about RC helicopters. I can't ever remember seeing a model presented for controlability issues with a flybar installed. However, their use is important, especially at small scales.

I did a bit of looking around and did come up with a paper from the Univ. of Toronto.

http://www.control.toronto.edu/~lidstone/Helicopter_thesis.pdf

Section 2.5 briefly goes int flybars and section 2 goes into some aerodynamic background. Start with this and see if this will help you with what you already have. I have a couple of references at home, but I don't think they discuss fly bars.

You may try RC forums, but I doubt you'll find anyone mathematically modelling their projects.
 
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FAQ: How to Model a Hiller Flybar Mathematically?

What is a hiller flybar?

A hiller flybar is a mechanical component used in helicopter rotor systems to stabilize the rotor blades and improve flight control. It is typically made up of a metal rod attached to the rotor blades at one end and a control mechanism at the other end.

How does a hiller flybar work?

A hiller flybar works by using centrifugal force to counteract the momentary imbalances caused by the rotation of the helicopter blades. As the blades spin, the flybar moves in the opposite direction, providing stability and preventing the helicopter from tipping over.

What are the benefits of using a hiller flybar?

The main benefit of using a hiller flybar is improved flight control. By stabilizing the rotor blades, the flybar allows for smoother and more precise movements of the helicopter. It also helps to reduce vibrations and improve overall stability during flight.

How do you model a hiller flybar?

To model a hiller flybar, you will need to consider factors such as the length and weight of the flybar, as well as its position and attachment points on the rotor blades. You will also need to take into account the forces and movements that the flybar will experience during flight and design it accordingly.

Can a hiller flybar be used in all types of helicopters?

While hiller flybars are commonly used in many helicopter designs, they may not be suitable for all types of helicopters. The use of a hiller flybar depends on the specific design and requirements of the helicopter, and some may use alternative methods for rotor blade stabilization.

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