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T-REX 500 › coin wobble????
12-14-2008 05:00 AM  9 years agoPost 1
louk05

rrKey Veteran

Flying in BelAir Maryland

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I was wondering what causes this?? My 500 flies great and all but I notice some times I hit back fast and it will kinda bounce and wobble. what causes this to do that?? Is it the fly bar seasaw to tight or what is it?? its like it just sits there wobble wobble all over not like its out of control and it will stop until I apply cyclic. If any one knows let me know. Thanks

Fly Hard,Crash Hard,Upgrade, Align,AMA#906056

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12-14-2008 05:49 AM  9 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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Head speed too low?

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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12-14-2008 12:13 PM  9 years agoPost 3
Ben-T-Spindle

rrProfessor

Central Illinois

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The head stiffness and the headspeed determine helicopter dynamic stability. You either need softer dampers or higher headspeed. Also loosening the blade bolts a little sometimes helps.

... BTS

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12-14-2008 01:23 PM  9 years agoPost 4
Magic Hook

rrApprentice

Naples, Florida USA

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It would not hurt to put a drop of Tri Flow on all of the friction points, swash, etc. Double check the ball links move freely as well. Rick

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12-14-2008 01:44 PM  9 years agoPost 5
CT.Chopper

rrVeteran

Meriden, CT

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check the tightness of the ball links,
then re-grease the dampners.

( some people perfer not to grease the dampners however i always grease the rubber dampners and never have a issue)

like someone else said in the post above,
check blade tightness, then if all that don't help you
it could mean the headspeed is a tad low.

Rob Landry.

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12-14-2008 02:26 PM  9 years agoPost 6
lugnutz

rrApprentice

trenton,nj

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sounds like the ball links are to tight because as you stated it goes away when giving cyclic so thats where i would start first

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12-15-2008 01:14 AM  9 years agoPost 7
louk05

rrKey Veteran

Flying in BelAir Maryland

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OK thanks

Yeah My flybar seasaw is tight so that is what I thought it was. I put washers on it and still a bit stiff so I used some wd40 and all loose now. Thanks and I thought that is what caused it but was not 100% sure so I thought I would ask you guys here on RR as any question I have ever asked has been answered. That is why I love RR. You can always get help any time and more than just one opinion. Thanks a lot guys

Fly Hard,Crash Hard,Upgrade, Align,AMA#906056

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12-15-2008 01:34 AM  9 years agoPost 8
mmc205

rrElite Veteran

PA - USA

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I've found using the mainblades to dig a small ditch in the ground and then using the airframe to tamp down all the loose dirt always seems to take the wobble out of mine.

***Logo 600 vbar***Henseleit TDR vbar***

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T-REX 500 › coin wobble????
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