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Home✈️Aircraft🚁HelicopterThunder TigerRAPTOR X50 › CGY 750+x50 FBL head vibration-gain settings?
12-13-2013 08:08 PM  5 years ago
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RcFreek

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Mombasa,Kenya

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CGY 750+x50 FBL head vibration-gain settings?
After a minor crash I setup my heli from scratch. Upon test flight I noticed the head vibrates sideways so I reduced the gain for ail from 55 to 45% on my 14SG. The vibration reduced. Going below that I got scared n thought of asking you folks what should be the gain settings on rud, ail and elev?
Can I go below 45% without any risk of the heli toppling to one side without recovering?
My LHS owns me!!!
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12-14-2013 03:26 AM  5 years ago
don s

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Chesapeake, VA

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I think your crash may not have been as minor as you thought, and something is bent somewhere. It doesn't take much unfortunately.
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12-14-2013 09:34 AM  5 years ago
Adam Landefeld

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Lehi, UT, USA

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45% is too low. There must be something else bent, or perhaps there is a bearing locking up somewhere in the head.

What was the nature of your crash? What have you changed and checked in the head and tail?

-Adam
Futaba Factory Team
Team FlightPower
Thunder Tiger

https://www.facebook.com/UtahHeli
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12-15-2013 03:07 AM  5 years ago
Dr.Ben

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Richmond, VA, USA

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It's safe with 45% gain, but as noted the shake is a symptom of more crash damage. Look at the head block itself, pitch arms, and any other components of overall subassemblies that took any damage at all in the crash.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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12-16-2013 07:14 PM  5 years ago
RcFreek

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Mombasa,Kenya

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I checked thoroughly for any bent parts but found none. The vibrations come during spool up n vanish upon gaining rpm. As for the gains I lowered to 35 for ail, 38 for elev and 45 for rudder. The ail n elev vibrations have reduced to nominal (if any) during spool up n henceforth none upon gaining rpm. Although im not happy with the tail gain settings. Gotta work on the rud settings further.My LHS owns me!!!
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12-16-2013 07:28 PM  5 years ago
don s

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Chesapeake, VA

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If the vibes aren't from the blades straightening out, then you may have too low a pitch value or too much throttle at that point on the stick. In other words not enough load on the engine at that point.
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12-16-2013 07:34 PM  5 years ago
RcFreek

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Mombasa,Kenya

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Nope. Ive ensured the throttle curve is set according to the pitch load on every point properly. Infact, I noticed as I increased the 2nd point on a 5 point throttle curve the vibration reduced drastically. 3rd point onwards it vanishes totallyMy LHS owns me!!!
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01-14-2014 01:42 PM  5 years ago
RcFreek

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Mombasa,Kenya

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I reset the swash setting and redid the setup from scratch. Finally settled for 25% for ail, 34% for elev and 55% for rud in normal mode. It flies ok nowMy LHS owns me!!!
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01-14-2014 05:05 PM  5 years ago
Adam Landefeld

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Lehi, UT, USA

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Hey rcfreek, what is the ball spacing on your servo horns for aileron and elevator? I'm wondering if yours are further out than mine and that accounts for the gain differences we can safely run on this machine.

Thanks!
-Adam
Futaba Factory Team
Team FlightPower
Thunder Tiger

https://www.facebook.com/UtahHeli
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