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Home✈️Aircraft🚁Helicoptere-AlignOther › What'sthe best Dampener for Trex
11-12-2005 12:41 PM  14 years ago
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AMainMaker

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Nappanee,IN

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What'sthe best Dampener for Trex
I was wondering what all of you are using for dampeners on your Trex's? I am wearing out the little O rings terribly fast. My heli knods worse than a bobble head when giving cyclic inputs. I have the head speed up around 2500 or so. Let me know
Jason
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11-12-2005 01:59 PM  14 years ago
Ben-T-Spindle

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Central Illinois

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I have heard that these red silicone o-rings work much better. I have not tried them but next time I make an order from Tower I will get some to try. http://www2.towerhobbies.com/cgi-bi...166&FVPROFIL=++

.
... BTS
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11-12-2005 02:14 PM  14 years ago
Heli88

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Clarkston, MI

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I have the O-rings that Ben mentions. They fly nice and crisp with no nodding or wobble.
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11-12-2005 03:21 PM  14 years ago
Ozydego

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Westerville, Ohio

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double O-rings and a plastic spacer, that is the same inner diameter as the spindle shaft and the same outer as the head hole.... it works very well, a stiff head and no wobble, although I do keep my blades fairly loose in the blade grips. If I tighten them too much, I get wobble, loosen them and it goes away.... try that first, or try a third o-ring...But Honey, I can't live with just stock.....
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11-12-2005 05:51 PM  14 years ago
hikscub

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California

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So, wouldn't that spacer effectively cut all the movement if it's the od is the same as the head hole?

How about using more spacers between the blade holder and the o-rings - that would compress the rings, right?

BTW, on the align site there is an "upgrade kit" that contains a thicker washer for the head. So it seems align's solution is to compress the o rings more.
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11-12-2005 06:45 PM  14 years ago
rotarypower3

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Melbourne, AUSTRALIA

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The "upgrade kit" has exactly the same size O rings as normal.
Sure you're not getting confused with the canopy rubbers?

BUT, the aluminium spacers are and extra 1mm thicker each. So this should nicely increase the dampening. (from 1.5mm to 2.5mm)
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11-12-2005 07:28 PM  14 years ago
drdot

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So. California, Orange County.

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fwiw..

Tried the red silicone damper o rings...The Tamuya version seems too soft, got chewd up in about 5 flts...Try the stock orings with a .5 mm Hirobo shim washer on each side...feels good, pretty easy on the o rings..I get about 25 flts before I turn the orings over..Use 40 wt silicone shock oil to lube the spindle and the o rings...

John.
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11-13-2005 03:38 AM  14 years ago
hikscub

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California

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Right, I was thinking about the spacers. Just one extra mil seems about right.
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11-13-2005 07:07 AM  14 years ago
3DHELIFLYERKID

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PA

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Jason,
Have you used vasaline of them? This helps a lot. But for hard 3d it is not uncommon to relpace them every 35-40 or less flights.
Keep'em Flying,
Nick
If the blades don't touch....you ain't low enough!
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11-13-2005 03:33 PM  14 years ago
AMainMaker

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Nappanee,IN

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I used dielectric greese on them. I added some rc car parts to the stock o rings and it worked out great. I flew it in the 18mph wind I had here last night and it was still responsive even into the wind. all I did was take one of the nylon shims ( http://www2.towerhobbies.com/cgi-bi...p?&I=LXPA19&P=X ) and put it between the stock black oring and the metal spacer and it worked out great. tightened the head and got rid of the knodding.
Jason
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11-13-2005 06:33 PM  14 years ago
Ozydego

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Westerville, Ohio

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The spacer I used is plastic, so it compresses as well,,,, So basically I guess it acts like a pre dampener and for me it works great... I have had people comment on how tight my head is as well, while maintaining smooth characteristics....But Honey, I can't live with just stock.....
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11-13-2005 08:54 PM  14 years ago
square 2024

rrNovice

Maldon U.K

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To help dampen,insert/fit piece of silicone tube over the alloy spacer,so you have the two o rings in the head,then the spacer with tubing over it, tighten up socket screws as required and hey presto a nice "tight" head...works a treat.

Martin
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11-13-2005 08:58 PM  14 years ago
JeffElecRC

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Ottawa, Ontario - Canada

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I like to use a wet sponge.
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11-14-2005 01:03 AM  14 years ago
AnnihilaT

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The Netherlands

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Jeff,

Would that be a sopping wet spunge or just a bit damp?
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