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HeliTorque :: View topic - Loss of tail rotor
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HeliTorque Forum Index » Ground School

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Loss of tail rotor
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Flyingtuga
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PostPosted: Tue Feb 20, 2007 4:06 pm    Post subject: Loss of tail rotor Reply with quote

Hello!
I would like to know more about general helicopter emergency procedures. Can you give me some reference manuals, links?
I have some doubts about loss of tail rotor that I would like to share with you:
- does weight affect the helicopter reaction after loss of tail rotor?
- does the main rotor disynchronizes?
Thank you very much! Very Happy
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KIEF
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PostPosted: Fri Oct 02, 2009 11:07 am    Post subject: Re: Loss of tail rotor Reply with quote

Flyingtuga wrote:
Hello!
I would like to know more about general helicopter emergency procedures. Can you give me some reference manuals, links?
I have some doubts about loss of tail rotor that I would like to share with you:
- does weight affect the helicopter reaction after loss of tail rotor?
- does the main rotor disynchronizes?
Thank you very much! Very Happy


This is just what I think NOT what I know for definite:

Ac weight would only affect it due to the amount of torque required. The larger amount of power required would mean a bigger yaw (L/R) if it failed.

Not sure what you mean by main rotor desynchronizes?
You would need to shut down the engine(s) to land.
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afterburner
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PostPosted: Fri Oct 02, 2009 6:50 pm    Post subject: Ground School Reply with quote

Firstly,
Please explain what you mean by loss of tail rotor? Loss of tail rotor effectiveness (aerodynamic), Loss of the ability to change TR pitch (mechanical), or Loss of the tail rotor itself (real crap!).

Each will affect the copter in different ways.

I believe by "disynchronize", you mean whether the main rotor blades will disconnect from the tail rotor transmission. No, they will not. The TR will remain connected through the TR transmission usually via shaft to the main engine transmission.

The main rotor blades will "disconnect" or "disyncchronize" as you put it, only when he engine fails.

As for the weight issue, as has been said, regardless of the reason, the more engine power is applied, the more torque results, and the greater the yaw will be if the engine quits, or if the tail rotor can no longer control the yawing effect.

You can Google for the Rotorcraft Flying Handbook put out by the FAA in the United States. It is free to download in pdf.
You can also go to YouTube and search for "Helicopter Training Videos 80s Style". There is an 8 part video series on Helicopter training and aerodynamics.

AB
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Bell 47-206, Schweizer 300/500, Citation 525
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