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Static Grounding

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jbr79r(at)yahoo.com
Guest

Posted: Thu Dec 31, 2009 9:02 am Post subject: Static Grounding

I fly a composite (E-glass not Carbon) Glasair and I am trying to deal with some static problems.  A suggestion was to run a separate ground wire from radios stack , the EFIS  and the AHRS directly to the ground buss as close to the battery as possible.  Static wicks are not an option . Any comments or ideas?

Jim

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77



  

 [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Thu Dec 31, 2009 11:51 am Post subject: Static Grounding

At 10:59 AM 12/31/2009, you wrote:

 	  Quote: 	
		  I fly a composite (E-glass not Carbon) Glasair and I am trying to 

deal with some static problems.  A suggestion was to run a separate 

ground wire from radios stack , the EFIS  and the AHRS directly to 

the ground buss as close to the battery as possible.  Static wicks 

are not an option . Any comments or ideas?


	


    If you're plagued with p-static in flight, then

    some form of surface treatment combined with

    static wicks are the only option. Grounds in

    the electrical system have no significance

    on this  issue.



    P-static in all composite aircraft having no

    submerged lightning mesh has been a problem

    since day-one. It's not an electrical/electronics

    problem.



    Bob . . .

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XeVision

Joined: 07 Oct 2009
Posts: 26
Location: Ogden, Utah

Posted: Thu Dec 31, 2009 12:00 pm Post subject: Re: Static Grounding

 	  jbr79r(at)yahoo.com wrote: 	
		  I fly a composite (E-glass not Carbon) Glasair and I am trying to deal with some static problems.  A suggestion was to run a separate ground wire from radios stack , the EFIS  and the AHRS directly to the ground buss as close to the battery as possible.  Static wicks are not an option . Any comments or ideas?

Jim

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77

	




I am in Ogden, UT and also fly a Glasair (I-RG) cruising at 200Kts Similar speeds (oversized engine 245 HP). 

Are you talking about static when flying through rain or snow ??? Or something else ??



When flying to Alaska a few years ago, Flying in some light snow at like 12-13K, I experienced such a static problem once that the cockpit was glowing and everything metal I touched shocked me.  

I made the mistake of touching the remote head (panel mounted control) for my ELT it it got "fried".



All the radios were loud static noise and sometimes a howling sound.

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_________________
LED still has a long way to go to compete with HID as a landing light. This is true in terms of total lumens and reach (distance).

jbr79r(at)yahoo.com
Guest

Posted: Thu Dec 31, 2009 12:35 pm Post subject: Static Grounding

I know I can't do much about the static, but I'm trying to do what ever I can to protect the avionics.

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77

From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>

To: aeroelectric-list(at)matronics.com

Sent: Thu, December 31, 2009 12:49:33 PM

Subject: Re: Static Grounding



 --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>



At 10:59 AM 12/31/2009, you wrote:

 	  Quote: 	
		   I fly a composite (E-glass not Carbon) Glasair and I am trying to deal with some static problems.  A suggestion was to run a separate ground wire from radios stack , the EFIS  and the AHRS directly to the ground buss as close to the battery as possible.  Static wicks are not an option . Any comments or ideas?


	


   If you're plagued with p-static in flight, then

   some form of surface treatment combined with

   static wicks are the only option. Grounds in

   the electrical system have no significance

   on this  issue.



   P-static in all composite aircraft having no

   submerged lightning mesh has been a problem

    

 [quote][b]

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jbr79r(at)yahoo.com
Guest

Posted: Thu Dec 31, 2009 12:38 pm Post subject: Static Grounding

I have been in and around clouds without any static like you mentioned but I lost the com port on my Chelton and the display screen on my TruTrak autopilot twice. 

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77

From: XeVision <dblumel(at)XeVision.com>

To: aeroelectric-list(at)matronics.com

Sent: Thu, December 31, 2009 1:00:07 PM

Subject: Re:  Static Grounding



 --> AeroElectric-List message posted by: "XeVision" <dblumel(at)XeVision.com (dblumel(at)XeVision.com)>



[quote="jbr79r(at)yahoo.com"]I fly a composite (E-glass not Carbon) Glasair and I am trying to deal with some static problems.  A suggestion was to run a separate ground wire from radios stack , the EFIS  and the AHRS directly to the ground buss as close to the battery as possible.  Static wicks are not an option . Any comments or ideas?

Jim

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77



 	  Quote: 	
		   [b]


	




I am in Ogden, UT and also fly a Glasair (I-RG) cruising at 200Kts Similar speeds (oversized engine 245 HP). 

Are you talking about static when flying through rain or snow ??? Or something else ??



When flying to Alaska a few years ago, Flying in some light snow at like  

 [quote][b]

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bgray(at)glasair.org
Guest

Posted: Thu Dec 31, 2009 1:40 pm Post subject: Static Grounding

Hi Bob,



I'm building a Glasair III, an E-glass composite. While I don't have a

metal mesh embedded in my skin, I was thinking of using a conductive

vinyl ester primer bonded to static wicks to tame the P-static demon.

Should I be concerned with the primer blocking the effectiveness of my

internal COMM/NAV/GPS antennas? I suppose I could mask those areas and

reshoot them with a normal primer but would that give me a rather

directional radiation/reception pattern on my antennas?



Is there any way I can test the effectiveness of a conductive primer on

e-glass in p-static suppression before I bite the bullet?



Bruce

www.Glasair.org 



--

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mprather(at)spro.net
Guest

Posted: Thu Dec 31, 2009 4:03 pm Post subject: Static Grounding

I don't have an answer, but a bit of speculation..



I suspect that p-static doesn't build as a uniform voltage all over the

airframe, but instead as a charge distribution along the pathway of high

speed airflow.  As such, I'd think you might be able to get rid of

p-static by adding a conductive path roughly aligned with the flow.  This

allows bleeding the charge off quietly.  The mesh is certainly the best

solution for providing this path, but I could imagine that other

techniques could be used.  Conductive coatings seem like a reasonable

thing to try.  I imagine that they are somewhat process sensitive, and

probably won't work as well as mesh - or a metal airframe.



Depending on where your antennas are, you could probably get away with

omitting the coating in these areas.  I kind of suspect if the coating

works well at warding off the p-static, it will also cause problems if

used over the antennas, and if it doesn't work well, you could spray it

everywhere and the antennas won't care.

Matt-



[quote] 



 Hi Bob,



 I'm building a Glasair III, an E-glass composite. While I don't have a

 metal mesh embedded in my skin, I was thinking of using a conductive

 vinyl ester primer bonded to static wicks to tame the P-static demon.

 Should I be concerned with the primer blocking the effectiveness of my

 internal COMM/NAV/GPS antennas? I suppose I could mask those areas and

 reshoot them with a normal primer but would that give me a rather

 directional radiation/reception pattern on my antennas?



 Is there any way I can test the effectiveness of a conductive primer on

 e-glass in p-static suppression before I bite the bullet?



 Bruce

 www.Glasair.org



 --

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klburris

Joined: 19 Dec 2009
Posts: 18

Posted: Fri Jan 01, 2010 2:05 am Post subject: Static Grounding

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James:   	  Quote: 	
		  You wrote: “I fly a composite (E-glass not Carbon) Glasair and I am trying to deal with somestatic problems.  A suggestion was to run a separate ground wire from radiosstack , the EFIS  and the AHRS directly to the ground buss as close to the batteryas possible.  Static wicks are not an option . Any comments or ideas?Jim<![if !supportEmptyParas]> <![endif]> James RobinsonGlasair lll  N79RSpanish Fork UT  U77”<![if !supportEmptyParas]> <![endif]>static problems.  A suggestion was to run a separate ground wire from radios 	
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<![if !supportLists]>n      <![endif]>Keith  

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