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Author Topic: Head dampener preload  (Read 1962 times)

Offline rotorhead51

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Head dampener preload
« on: January 02, 2017, 11:19:35 AM »
New to the N5C, first build.
one thing I noticed from putting together the head is that I don't have enough preload on the dampeners.
the main spindle moves up and down a little with just one washer on each side.
Question I have is, other than adding another washer to increase preload, has any one had success with Ralph's FBL progressive head dampening system on the N5C?
thinking of going one green inside and two blue outer.
Be great to hear everyone's experience with these and how you set it up.
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Offline Mike Spano

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Re: Head dampener preload
« Reply #1 on: January 03, 2017, 10:13:30 AM »
There are 2 different size head shims that come with the kit. First try the larger set. I cannot remember off the top of my head what exact size they are. Maybe .75 and 1mm?

I personally didn't like the progressive dampening they Ralph did. That o rings are too thin. The new one on the 766 is perfect because the size of the dampeners. I really like that one. I have worn or the o rings in Ralph's in less than 50 flights (that's no exaggeration).

If the second set of shims doesn't help,  then post back up and we can try one more thing. You may have to message me on here though, sometimes I can't get on here every day anymore.
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Offline Matt Botos

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Re: Head dampener preload
« Reply #2 on: January 03, 2017, 05:01:15 PM »
Don't preload anymore than 1mm, instead.... wrap the dampers with two layers of scotch tape. Works like a charm.




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Offline Mike Spano

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Re: Head dampener preload
« Reply #3 on: January 04, 2017, 07:50:19 AM »
Quote from: Matt Botos on January 03, 2017, 05:01:15 PM
Don't preload anymore than 1mm, instead.... wrap the dampers with two layers of scotch tape. Works like a charm.




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this was going to be my tip :)
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Offline Gabriel Sandoval

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Re: Head dampener preload
« Reply #4 on: January 04, 2017, 03:40:02 PM »
Yep 2 wraps of tape and all is well! ;)
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Offline rotorhead51

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Re: Head dampener preload
« Reply #5 on: January 05, 2017, 02:34:35 PM »
Great tip, thanks for the reply
I will try it as soon as the weather gets better here in Ontario, Canada.
Happy Flying!
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Offline Matt Botos

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Re: Head dampener preload
« Reply #6 on: January 06, 2017, 11:25:03 AM »
Sorry to steal your glory Mike


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Offline rotorhead51

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Re: Head dampener preload
« Reply #7 on: January 14, 2017, 08:55:22 AM »
Followup: wrapped with two layers of tape, worked great!
Thanks again for tip.
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Offline Mike Spano

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Re: Head dampener preload
« Reply #8 on: January 16, 2017, 03:00:47 PM »
Quote from: Matt Botos on January 06, 2017, 11:25:03 AM
Sorry to steal your glory Mike


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LOL! and I was building up some suspense! I was waiting to hear back from him! LOL
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