Matronics Email Lists :: View topic - What's advantage of conductive fuel hose?

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

What's advantage of conductive fuel hose?

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

nuckollsr(at)cox.net
Guest

Posted: Thu Jan 25, 2007 4:23 am Post subject: What's advantage of conductive fuel hose?

Dunno . . . I'll ask around the power-plant and fuel systems

guys today.



Bob . . .



At 07:33 PM 1/24/2007 +0000, you wrote:



 	  Quote: 	
		  



I am working on final plumbing of Europa / Rotax 914 fuel system.



The system is a plastic rotomolded fuel tank, mostly rubber automotive

5/16" fuel injector hose, 2 vane style electric fuel pumps.



I have plumbing completed to 2 Flowscan 201B fuel flow sensors (add flow

in, and subtract return to tank).



I want to use Aeroquip 666 to run from the 201B through firewall to the

fuel pressure regulator, and then from the fuel pressure regulator return,

through the firewall to the return 201B.



I read somewhere that the 666 hose has stainless braid on the outside,

Teflon hose on the inside and it is electrical conductive. Didn't think

much about it, I just assumed that they were talking about the braid.



After getting a sample of the hose, I see that they have the internal wall

of the hose coated with a black substance that is probably;y electrical

conductive.



2 Questions:



1) Why would you want the internal wall of a hose electrical conductive?



I read 43.13 and they really don't tell much as to why. If it is static

discharge, is that really important? There are plenty of cars on the road

with rubber fuel lines?



Perhaps for lightening strike??



If I use this hose in my system (approx 4 feet in and 4 feet out) am I

creating any problems? Aeroquip makes very close to the same hose for Auto

racing guys without the black conductive coating. You see this as a more

appropriate hose for my system/plane?



2) More of a concern I think is there is this thin black coating inside a

Teflon tube. If it begins to flake off, it could cause much problems.



Has anyone had any flaking problems?? I can easily see causing an upset to

this coating when installing hose ends.



Thx.

Ron Parigoris

--

10:31 PM



-- incoming mail is certified Virus Free.

Checked by AVG.


	




        Bob . . .



        ----------------------------------------

        ( IF one aspires to be "world class",  )

        ( what ever you do must be exercised   )

        ( EVERY day . . .                      )

        (                  R. L. Nuckolls III  )

        ----------------------------------------

- 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

Bill McMullen

Joined: 23 Nov 2006
Posts: 7

Posted: Thu Jan 25, 2007 10:16 am Post subject: Re: What's advantage of conductive fuel hose?

I think this article gives a good start for answering this question ... basically the conductive liner is preventing static sparks between the inside of the hose and the braid.



http://www.sacskyranch.com/statichose.htm

- 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

rparigor(at)SUFFOLK.LIB.N
Guest

Posted: Thu Jan 25, 2007 11:11 am Post subject: What's advantage of conductive fuel hose?

Hello Bob



Will appreciate what you find.



"> Dunno . . . I'll ask around the power-plant and fuel systems

 	  Quote: 	
		   guys today."


	




I uncovered an article:

http://www.tc.gc.ca/civilaviation/systemsafety/newsletters/tp3658/PDF/4_2004.pdf



That talks about a few helicopter fuel systems "expanding very rapid".



Ultimate question, on our plastic Europa, would it be a worthwhile

exercise to run anything that conducts to the negative side of the battery

that would in essence connect all of them together? If the answer is yes,

would it be advisable to run all of these pieces to a single point ground

(make a separate single point ground and run it direct to battery that is

always connected)?



Bits and pieces that could be connected:

aluminium fuel cap receptacle

aluminium fuel elbow between filler and tank (~1 foot long)

2 aluminium fuel outlets from plastic tank that have 1 foot copper tubes

for water draining

Brass barb fittings

2 flowscan 201B fuel flow senders 

2 lengths of Aeroquip 666 hose

2 aluminium water drain connectors



The things that can not be grounded

Plastic Rotomolded fuel filler

Rotomolded fuel tank

5/16" fuel injector hose, and plenty of it (don't think it conducts very

well?)



Very sketchy tale I heard about a Europa lost in a fire when refueling??

 	  Quote: 	
		  From a hands on Europa Guru, said just wipe fuel filler area with a water

damp cloth rag before refueling and don't worry bout it, been refueling
	


plastic aeroplanes and boats for years without a problem.



Ron Parigoris

- 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

rtitsworth

Joined: 16 Jan 2006
Posts: 76
Location: Detroit, Mi

Posted: Thu Jan 25, 2007 5:30 pm Post subject: What's advantage of conductive fuel hose?

I believe non-conductive fuel hose lining builds up static electricity as

the fluid flows through it.  Then, the static electricity eventually

discharges (sparks) out to the exterior braid and thus burns a small hole in

the lining (bad).



--

- 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

Display posts from previous:

	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