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Aerobatic FAI F3C Contest > Tuning the flybar using weights for FAI
 
 
vfastr6
Veteran
Location: Cape Town, RSA

Is anyone using flybar weights to tune their flybar for FAI?

I haven't been able to find out much about this on the web, but tested out some weights this weekend.

Someone correct me if I'm wrong here:
1) When hovering into wind and the heli moves backwards, the flybar is too heavy, and thus less responsive.....

2) When hovering into wind and the heli moves forwards, the flybar is too light and thus more responsive and the flybar weights need to moved outwards.

Cheers
Marc
02-25-2004 Over year old.
HOMEPAGE  
 
 
Heli genius
Senior Heliman
Location: Hong Kong

The heavier paddle will make the cyclic response slower. However, the response to the side wind is not significant by just changing the paddle weigh.

Your statement 1 & 2 is regarding the Bell-Hiller mix ratio, the delta of the rotor head design, blade airfoil, head speed, paddle size... Just focus on paddle weight cannot solve your problem.

A good setup of rotor head can compensate the effect of side wind and this involve every elemnet of the rotor head.

Hope you can find a better setup
02-25-2004 Over year old.
 
 
vfastr6
Veteran
Location: Cape Town, RSA

Thanks for the reply - I saw an interesting post somewhere in runryder where the pilot has used 60 and 80 dampeners on the head (60 on one side and 80 on the other).

Might give that a try too...

PS - what head are you running? I've got the ssr-II and it works well anyway...
02-25-2004 Over year old.
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Secret Squirrel
Key Veteran
Location: New Zealander living in Melbourne, Australia

Try this article: http://www.littlerotors.com/article...80204/index.asp

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Simon Lockington
02-25-2004 Over year old.
HOMEPAGE  
 
 
vfastr6
Veteran
Location: Cape Town, RSA

Thanks Simon - Great article.
One question tho - are you using the swashplate phasing function on the 9Z? If so, how does this work?

Cheers
Marc
02-26-2004 Over year old.
HOMEPAGE  
 
 
Secret Squirrel
Key Veteran
Location: New Zealander living in Melbourne, Australia

No I don't use it I haven't found that I've needed to.

Remember, the more complicated you make your setups, the more you're setting yourself up for failure...

Si

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Simon Lockington
02-26-2004 Over year old.
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Jarno
Veteran
Location: Finland

...keep the setup simple and make just one change at a time to see the effect it makes. FAI setup is a lot of trial and error. The setup that works for some other pilot, doesn't necessary fit your flying style.

The pilot who used two different durometer dampeners at the same time, was me It worked well fot that time, but doesn't mean that I would use it all the time. It was just a quick change just before second round because I really hadn't any time to fiddle something else. But it worked well anyway.

You can use extra weights on flybar, but keep in mind that it makes your controls less sensitive. I see you're flying the SSR-II head, which in my opinion is way less sensitive than e.g. SSR-VI. So you don't need any extra weight if you're having all the weights inside the paddles or at least do not put them very out on the flybar. If you have very heavy paddles and the extra weights on the flybar it may be difficult to correct the hellicopter fast enought especially when going slow piruettes, in which imo the SSR-II needs more correction than the SSR-VI. SSR-VI does really get out of your control in wind without some changes in the head. I'm tweaking on them now, but haven't found a superb setup yet

Jarno
02-26-2004 Over year old.
HOMEPAGE  
 
 
Jarno
Veteran
Location: Finland

Simon,

Your article is GREAT and should be read by any pilot no matter if he/she flys 3D or FAI!

Jarno
02-26-2004 Over year old.
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vfastr6
Veteran
Location: Cape Town, RSA

Thanks Jarno.

I must admit, the keep it simple thing seems to work best. I've just got a 9Z and have pretty much started my setups from scratch again.

I spent a while on the pitch purves and found that once set up to my liking gave a sweet hovering machine, but found that it was not great to hover in the wind. That was when I took out the brass weight from the paddles and started testing the flybar weights. I was only able to spend one flight on tuning the flybar, but will hopefully have more time this weekend to sort it out completely.

Cheers
Marc
02-26-2004 Over year old.
HOMEPAGE  
 
 
Secret Squirrel
Key Veteran
Location: New Zealander living in Melbourne, Australia

Thanks Jarno,
The article was meant to give people an idea of what they can do to the rotorhead to yield changes to the characteristics of their heli. I'm glad you liked it.

Thanks very much,
Si

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Simon Lockington
02-26-2004 Over year old.
HOMEPAGE  
 
 
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Aerobatic FAI F3C Contest > Tuning the flybar using weights for FAI
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