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pwmac(at)sisna.com
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 Posted: Sun Apr 30, 2006 12:28 pm Post subject: Grounding of fuel tanks |
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The copper tape is an appealing way to go if one has the covering
complete. Just solder it at the filler glue it to the fabric and
screw it to the spar. Then paint the strip. Sounds like a reasonable approach.
Paul
=============
At 05:41 PM 4/29/2006, you wrote:
| Quote: |
Glad you are keeping us straight Paul.
Without everything grounded, it probably is a good
idea to touch the can or hose to the unopened cap
first, then open the cap to fuel.
But I am counting on good looks and luck right now
myself. Too many things to make right and not enough
time to do them all, darn. Glad others learn this
stuff here before they build too far. I got here to
late to run the filler neck wire under the fabric.
Got to do make shift corrections until to-dos and
time come together.
Kurt S.
--- PWilson <pwmac(at)sisna.com> wrote:
> Kurt, good point Always ground the plane before
> starting the fueling
> process. A built up charge may be present. One
> thing to remember is
> that the first line of defense from static discharge
> during fueling
> is that the fuel nozzle always be in contact with
> the tank inlet
> during fueling. This practice is the reason that the
> planes that do
> not have the filler neck grounded to the airframe
> have not had an
> incident. This likewise applies to funnels whether
> conductive or not.
> Never let the gasoline squirt into a vessel without
> contact between
> the vessel and the source of the fuel. Example: do
> not pour fuel into
> a funnel unless the Jerry can spout is in contact
> with the funnel.
> Not sure the chain from the filler neck to bottom of
> the tank has
> merit. This is because the static charge buildup is
> the result of the
> liquid flowing thru the vapor above the liquid
> surface. Thus if there
> is a ground path from the source (say a fill nozzle)
> to the flowing
> stream there will not be arcing.
> Regards, Paul
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shericom(at)rogers.com
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| Posted: Wed May 10, 2006 9:19 am Post subject: Grounding of fuel tanks |
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Hi Lynn, I finally tried to install the ground braid to the filler neck only to discover the tanks I have are fitted with aluminium filler necks, so much for soldering to them, I'll have to find some other way to connect the ground, Thanks for you help, Don
Lynn Matteson <lynnmatt(at)jps.net> wrote:
That might have been me, Don. I used the Aircraft Spruce 1/4" tin
plated copper braid p/n 863, p.419. I attached it to the spar with a
ring terminal under a washer, then the spar attaching nut. I soldered
the braid to the filler neck, being careful to put it low enough to
clear the filler cap. I used a 200-watt soldering iron to do the job.
Lynn
On Friday, April 28, 2006, at 04:39 PM, Donald STEVENSON wrote:
| Quote: |
Some weeks ago I saw discussions on grounding of the filler neck on
the fiberglass fuel tanks (M4) to the rear spar with copper braid. My
question is what size brade is required and how is it connected to the
spar? I beleave it was soldered to the tank neck. Thanks in advance,
Don
Don Stevenson, Caledon, Ontario, Canada
M4/1200-912s Speedster
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