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05-01-2010 12:38 AM  8 years agoPost 1
towertsk

rrApprentice

Chula Vista, CA

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When mounting these they don't feel very secure. Not much torque can be applied as well. Anyone else have this issue or have a fix?

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06-02-2010 04:29 PM  8 years agoPost 2
CoronaL

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Winnebago IL

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I don't have one, but my advise is use red locktite on that whole head assembly.

Randy!!! I am the liquor

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06-02-2010 04:35 PM  8 years agoPost 3
towertsk

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Chula Vista, CA

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it seems like the provide bolts are a little short. I swapped them out with a few mm longer bolts. I also put red loctite (great minds think a like)

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06-02-2010 05:03 PM  8 years agoPost 4
Scott Anderson

rrVeteran

Enterprise, Al

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did the longer bolts take the slop out?

Synergy R/C Helicopter Field Representative

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06-02-2010 05:07 PM  8 years agoPost 5
towertsk

rrApprentice

Chula Vista, CA

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The slop I'm getting is from the bolts that hold the grips to the feather shaft.

I order new dampers I hope that will fix it. If not i'll try and double up the spacers.

I get crazy vibrations when I get the head up to speed.

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06-02-2010 05:20 PM  8 years agoPost 6
Scott Anderson

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Enterprise, Al

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be careful adding shims , if too much is added it can cause the outboard bearings not to seat properly on the feathering shaft. Also the thread engagement will be less.

is it a blade track problem or is it a lateral vibe?

Synergy R/C Helicopter Field Representative

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06-02-2010 05:33 PM  8 years agoPost 7
towertsk

rrApprentice

Chula Vista, CA

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There is way too much lateral play in the grips. The play is extremely noticeable via the upper mixing arms.

The blades track fine, when hovering but in idle up the vibrations get bad. It ended up in a crash during its last flight. I bought new main grips and dampers(black and green sets). I'm hoping that fixes the problem.

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06-02-2010 05:44 PM  8 years agoPost 8
Scott Anderson

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Enterprise, Al

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make sure the bearing and shim stack up is correct on both sides, use a good grease during assembly. Also double check the fly bar, make sure the bar is centered and then measure the distance between the paddles and fly bar cage is correct.

I haven't notice dampers to cause lateral play but if they are damaged I'm sure it's possible.

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06-02-2010 05:50 PM  8 years agoPost 9
towertsk

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Chula Vista, CA

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I use calipers to set the flybar. Setting equal lengths before and after mounting paddles.

The problem could be any or a combination of the following:

Dampers are not wide enough
Spacers are not wide enough
Feather shaft too long

I've verified the main grip bearings assembly. But i'll take a look again.

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06-02-2010 06:00 PM  8 years agoPost 10
Scott Anderson

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Enterprise, Al

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not sure what the specs on the dampers are. With it assembled push one grip in toward the hub to where there is no play in it, measure the opposite side, divide that by 2. that will tell you how much shim can be added.

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06-02-2010 06:03 PM  8 years agoPost 11
towertsk

rrApprentice

Chula Vista, CA

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I'll assemble the head with the new parts, hopefully it's not reoccurring. if it is i'll measure the gap length, but where would I get those shims?

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06-02-2010 06:20 PM  8 years agoPost 12
Scott Anderson

rrVeteran

Enterprise, Al

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in the past i've used small thin washers from the hobby shop.
here are the stock specs
dampers 3.85x6.5x4mm
spacers 4x5.4x1.5mm
washer 5.5x8x0.4mm
flat washer 2x5x0.5mm

hope this helps

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06-02-2010 06:22 PM  8 years agoPost 13
towertsk

rrApprentice

Chula Vista, CA

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Thanks for the numbers!

I'll verify them during the reassembly.

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06-02-2010 06:25 PM  8 years agoPost 14
Scott Anderson

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Enterprise, Al

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no problem

oh yeah thrust bearings are 3.5mm and the sealed bearings are 3mm.

Synergy R/C Helicopter Field Representative

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09-29-2010 03:54 AM  8 years agoPost 15
Wedge77

rrVeteran

St. Charles Missouri USA

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mine had the mixing arm break off, snapped the bolt when i tried putting the control rod back on. hoping i can get that tiny ass scew out of the blade grip.

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