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icubob(at)newnorth.net
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 Posted: Sun Jan 11, 2009 4:14 am Post subject: ground straps |
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a little off the original mark but concerns grounding fuel tank. we all know static elec. starts fires. a low wing burnt at my airport 2 yrs ago while refueling. anyway.........a friend had always assumed his alum. tanks were ''bonded'' to his engine by an all metal fuel line system. the ground point was his exhaust pipe at the fuel pump. he recently checked continuity from engine to tank and even with all that metal plumbing he had an open circuit. it was traced to a joint where a little permatex had been used! i am still building and it was a simple matter for me to ground my tank to the firewall with a wire, forget the metal line. i guess i dont know how this relates to plastic or fiberglass tanks.
fwiw, bob noffs
[quote][b]
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Lynn Matteson
Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan
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| Posted: Sun Jan 11, 2009 6:33 am Post subject: ground straps |
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When I was building, this subject came up and I reacted by soldering
a 1/4" ground strap onto the filler neck and running it under the
fabric covering down to the rear spar mounting bolt. I have pictures.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 600.2 hrs
Sensenich 62x46
flying again after engine rebuild, and new Electroair direct-fire
ignition system;
also building a new pair of snow skis
On Jan 11, 2009, at 7:13 AM, Bob Noffs wrote:
| Quote: | a little off the original mark but concerns grounding fuel tank. we
all know static elec. starts fires. a low wing burnt at my airport
2 yrs ago while refueling. anyway.........a friend had always
assumed his alum. tanks were ''bonded'' to his engine by an all
metal fuel line system. the ground point was his exhaust pipe at
the fuel pump. he recently checked continuity from engine to tank
and even with all that metal plumbing he had an open circuit. it
was traced to a joint where a little permatex had been used! i am
still building and it was a simple matter for me to ground my tank
to the firewall with a wire, forget the metal line. i guess i dont
know how this relates to plastic or fiberglass tanks.
fwiw, bob noffs
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contribution_-
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_________________
Lynn
Kitfox IV-Jabiru 2200
N369LM |
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Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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| Posted: Sun Jan 11, 2009 7:27 am Post subject: ground straps |
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Metal tanks can be grounded and will then drain static electricity off to ground. Plastic and composite tanks are insulators so not only can you not ground them but static charges can build up on them.
Noel
From: owner-kitfox-list-server(at)matronics.com [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of Bob Noffs
Sent: Sunday, January 11, 2009 8:43 AM
To: kitfox-list(at)matronics.com
Subject: ground straps
a little off the original mark but concerns grounding fuel tank. we all know static elec. starts fires. a low wing burnt at my airport 2 yrs ago while refueling. anyway.........a friend had always assumed his alum. tanks were ''bonded'' to his engine by an all metal fuel line system. the ground point was his exhaust pipe at the fuel pump. he recently checked continuity from engine to tank and even with all that metal plumbing he had an open circuit. it was traced to a joint where a little permatex had been used! i am still building and it was a simple matter for me to ground my tank to the firewall with a wire, forget the metal line. i guess i dont know how this relates to plastic or fiberglass tanks.
fwiw, bob noffs
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[quote][b]
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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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