Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Grounding to tube structures

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List
View previous topic :: View next topic  
Author Message
johnr470(at)aol.com
Guest





PostPosted: Fri Mar 01, 2019 1:04 am    Post subject: Grounding to tube structures Reply with quote

Unfortunately it is already covered and in the rear of the fuselage where access is somewhat difficult.

Thanks

Quote:
On Feb 28, 2019, at 11:30 PM, AeroElectric-List Digest Server <aeroelectric-list(at)matronics.com> wrote:

*

==================================================
Online Versions of Today's List Digest Archive
==================================================

Today's complete AeroElectric-List Digest can also be found in either of the
two Web Links listed below. The .html file includes the Digest formatted
in HTML for viewing with a web browser and features Hyperlinked Indexes
and Message Navigation. The .txt file includes the plain ASCII version
of the AeroElectric-List Digest and can be viewed with a generic text editor
such as Notepad or with a web browser.

HTML Version:

http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 19-02-28&Archive=AeroElectric

Text Version:

http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 19-02-28&Archive=AeroElectric


================================================
EMail Version of Today's List Digest Archive
================================================


----------------------------------------------------------
AeroElectric-List Digest Archive
---
Total Messages Posted Thu 02/28/19: 4
----------------------------------------------------------


Today's Message Index:
----------------------

1. 06:29 AM - Grounding to tube frame structures (John Hulls)
2. 07:18 AM - Re: Grounding to tube frame structures (Robert L. Nuckolls, III)
3. 08:46 AM - Re: Static Wicks - Bonding of Flight Controls (Robert L. Nuckolls, III)
4. 04:34 PM - Re: Static Wicks - Bonding of Flight Controls (jsajpf)



________________________________ Message 1 _____________________________________


Time: 06:29:38 AM PST US
From: John Hulls <johnr470(at)aol.com>
Subject: Grounding to tube frame structures


What is the best method to ground a battery located behind the baggage compartment
to a frame tube in a fabric covered aircraft?


________________________________ Message 2 _____________________________________


Time: 07:18:39 AM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>
Subject: Re: Grounding to tube frame structures

At 08:28 AM 2/28/2019, you wrote:
>
> What is the best method to ground a battery located behind the
> baggage compartment to a frame tube in a fabric covered aircraft?

You would like to have a gas-tight connection
to structure . . . ideally a welded bolt-
tab to accept the battery(-) lead.
Is the airplane already covered?
If not, adding the tab should be
a relatively simple task.


Bob . . .

________________________________ Message 3 _____________________________________


Time: 08:46:36 AM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>
Subject: Re: Static Wicks - Bonding of Flight Controls

At 10:21 PM 2/27/2019, you wrote:
> <john.friday_adis(at)sbcglobal.net>
>
> Bob (et al),
> Looking for insight into legacy Type Certificated airplane design
> rationale for installing static wicks and bonding jumpers between
> fixed structure and movable flight control surfaces.

Selecting style, number and placement of
static wicks on a TC aircraft is an arduous
task made possible by a survey of the ship's
natural streamer locations . . . which
may or may NOT be in the same locations
for similar aircraft. We used to bolt
static wicks to some models at Cessna . . .
as I recall it was a kit that a customer
could order. But I'm 99% sure there were
no electro-static survey tools used to
optimize the location of wicks much
less confirm their efficacy.


> Several E/AB designs do not specify installation of static wicks nor
> bonding jumpers for flight control surfaces. The particular design
> I plan to build is among this group and reports from those with
> years flying the design are (albeit a limited number of
> respondents): no issues with P-static and the like.

Then I wouldn't worry about it. P-static
issues are rare in the OBAM aircraft world.
We just don't spend much time cruising at
300 knots through rain, snow or ice
crystals.

> I cannot attest to the types of operations, nor how frequent the
> exposure to conditions conducive to P-Static interference, for the
> respondents to my query.
>
> Looking for input from TC house folks (Bob) regarding rules of
> thumb, design standards, etc. regarding incorporation of static
> wicks and bonding??
>
> My experience with the subject matter is as a maintainer,
> troubleshooting reports of symptoms of P-Static while in visible
> moisture, required inspections after a lightning strike, routine
> verification (inspections) of electrode-to-surface bonding values,
> etc. Correction of broken or degraded control surface bonding cured
> the majority of reported faults. Some degraded antenna bonds are
> among the mix as well. Design standards applicable to mitigating
> P-Static trouble are not clear to me and my understanding of design
> criteria/recommendations is admittedly academic (at best).
>
> What say ye, the sage?!

I wouldn't bolt any hardware to the
airplane until experience suggests
it might fix a demonstrated difficulty.


Bob . . .

________________________________ Message 4 _____________________________________


Time: 04:34:39 PM PST US
Subject: Re: Static Wicks - Bonding of Flight Controls
From: "jsajpf" <john.friday_adis(at)sbcglobal.net>


Sounds like wisdom to me Bob. Thanks for the response!
John


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=487869#487869










- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
JohnCiolino(at)carolina.r
Guest





PostPosted: Fri Mar 01, 2019 8:01 am    Post subject: Grounding to tube structures Reply with quote

One route to go is to use a non-insolated Adel clamp (e.g. AN742-10 in
steel) on an interior tube. You would have to sand all the paint off the
tube to make good contact.

John Ciolino
Bearhawk Patrol

--


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
user9253



Joined: 28 Mar 2008
Posts: 1900
Location: Riley TWP Michigan

PostPosted: Fri Mar 01, 2019 10:06 am    Post subject: Re: Grounding to tube structures Reply with quote

The airframe does not necessarily have to be grounded does it?
Just run a separate cable from battery negative to the engine block or firewall.
If the airframe must be grounded, is there a convenient place forward of the battery?


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Joe Gores
Back to top
View user's profile Send private message
nuckolls.bob(at)aeroelect
Guest





PostPosted: Fri Mar 01, 2019 1:31 pm    Post subject: Grounding to tube structures Reply with quote

At 03:02 AM 3/1/2019, you wrote:
Quote:
--> AeroElectric-List message posted by: John Hulls <johnr470(at)aol.com>

Unfortunately it is already covered and in the rear of the fuselage where access is somewhat difficult.

consider running a battery(-) wire all the way
up to the firewall ground stud. What size
engine and battery are we talking about?
How much wire to get from battery to firewall?



Bob . . .


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group