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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Tail rotor blade size
08-24-2020 08:41 PM  30 days ago
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shagdogjr

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Willits, California

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Tail rotor blade size
I have what might be a dumb question to most
I have been trying to replace my plastic tail rotor blades with carbon fiber
My question is can I install longer blades?
It’s a JR Vigor CS with 690 main blades and a YS 91 with Curtis Youngblood muscle pipe stock are 97mm I want to know if I can use either 105/106mm tail rotor blades any help would be appreciated
Bob
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08-24-2020 11:47 PM  30 days ago
Rojoalfa

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Punta de Mata, Monagas-Venezuela

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Ok... Your helicopter size is 90 or serie 700.
You can install tail blades up to 105 mm with main blades of 710 mm.

The only thing you need to check is that the main blades don't hit the tail rotor blades.

In order to do that, you put one main blade over the boom to see if main rotor blade may be hit it while rotating by tail rotor blades.
To do the test, you need to flex the main blade down while rotating to see if the tail rotor blade could be hit it.

PD

Put in other way, the main rotor diameter should not intercept with the tail rotor diameter.

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Saludos cordiales,
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