Feathering shaft and dampers

[lolo]

I grabbed my E7 by the grips and moticed "a lot" of play in the head. It looks like the dampers are not tight enough. I have a video that shows this but it's not possible to upload videos with tapatalk.
Is that normal or does the head should very tight?

[seldred]

Mine has no play. Check your bearing size and let us know what they are.

[lolo]

I'm back at home. I'm going to disassembled the head and check that.
Thanks

[Chuck Bole]

 Mine felt loose too. I took the head apart to check the OD on the outer thrust race.
Found the OD to be too large. A few minutes with a dremel tool fixed that and
on re-assembly i found all the "Play" in the dampening gone. I did use a bit thicker shim.
It had 1mm shims at first and i replaced them with 1 shim on each side that measured 1.01mm.
Not much of a difference but it did improve it tho.

chuck

[lolo]

Well, I have disassembled the head, Everything was as per the manual.
One of the damper was very soft. I was able to completely squeeze very easely with my two fingers. But the other one was "unsqueezable". So, I took two new dampers I had from a brand new N5 head and also the inner plastic sleeve from this head. It feets perfectly and there's no more trouble.
We'll see tomorrow morning...

[Branden Wheaton]

I had the same problem what I found was the lube I was using was breaking down my dampers.

[Kevin Feil]

Branden,

 What Lube were you using so no one else falls victim to that. I have seen that Before!!

Kevin

[churchyj]

We have found some of the kits have had these out of size thrust bearings, installed a new set with some new dampers and all was fine.  It seems one of the dampers was some sort of soft rubber compared to the other.

[lolo]

This is the first lube I used:
http://www.prolab-technologies.com/products-190-2-gs-1000-100-synthetic-grease.php

And this is the second one, for the new dampers:
http://www.bocabearings.com/bearing-inventory/13933/roadgreasepower-lbt-lightning-lube

[lolo]

Flight Report :
Much better like this.
In addition, this morning I bought & installed RB 696 & 106
But I had to lower a lot my gains on Aileron -> from 60% to 45%
Does the mix of new blades and stiffer head could have some much impact on aileron gains 

[ElectricSheep]

While we're on the topic of dampers... Just to be sure -- these dampers must be greased, correct?

Sorry, I  don't have my manual with me and want to be sure; some other heli models work better with the dampers dry with no grease, but I'm 99% sure I read in the manual that the E6/E7 dampers should be greased. I usually use Dow Corning Molykote EM-30L synthetic grease which works well with plastic and rubber components.

[Ross Lawton]

Hi,

I always grease the dampers with a Silicone based grease like Triflow which is safe to use on rubber and O'Rings so it will not degrade the dampers. Just a small amount on the dampers and spindle shaft to allow everything to float and move freely.

Hope this helps,
Cheers!
Ross

[Darren Lee]

My stock E6 dampers were either too soft or out of tolerance dimensionally because my head also had a lot of play.  Matt fixed me up with a new set of dampers and it's been rock solid for many many flights now.

[ktargett]

I have just added a 15thou shim either side because the damping felt very soft after only a couple of flights.

Should I change the dampers instead ?

Kevin

[RobMcQuillen]

Hey guys,

I'm having a similar issue. I'm going to get the new dampers from Matt but in the mean time do you guys think its still safe to fly?

Rob