Tail rotor flapping blade holders

[Marbaise Philippe]

Dear all,

I will try to describe what puzzles me with the tail rotor blade holders.

On the tail rotor you have three parts.
The central Aluminium hub, and two blade holders.
In these blade holders, there's a ballbearing which is fixed to the central aluminium hub using a 2mm screw.
When the building is finished. The blade holders have a lot of flapping angle available in all direction but seems to have less when you make a traction on them.

My questions are:
Is that normal?
If Yes, Why?
If Not, What to do to solve it?

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philippe.marbaise@skynet.be

[Electric4fun]

This puzzled me too... Mine does the same thing, so I went through it and checked it out. As long as the screws are tight no problems have occured. I believe this is normal, because I bought a second ECO8 and after construction the tail rotor it had the same flappy sloppy.... (Highly Technical Term There) Ha! Seem normal to me as for why? Ummmmm you got me I wouldn't mind knowing why too.

[Kevin Murray]

My take on this is that the flapping action allows them to find there own center piont, like the main blades do. Centrafugal force pulls them out to a point where their weight/inertia best offsets the other blade.
??

[joe]

I replaced the single bearing with two thinner ones with great resaults
realy stifens it up

[Marbaise Philippe]

I unmount and remount my tail rotor but it seems to be a normal situation.

I read on a real heli theory website that the tail rotor should allow for some flapping angle to compensate the dissymetry of speed between advancing and retreating blade while in forward flight.

I suppose this to be true.
A Eco-8 possessor told me that it was normal.
He flies like this without problem.

Thanks for your replies.