pitts_pilot(at)bellsouth.
Guest
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 Posted: Thu Oct 05, 2006 8:39 am Post subject: Grounding |
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Good advice Rick. I've heard that the guys refueling passenger jets can
get a good whack if they touch the airframe when holding the ground
clamp. Static doesn't build up as much on our slower birds. And that
JP-X (I think they're up to 7 now) isn't nearly as flammable as avgas or
mogas. I'm aware of at least one Pitts that converted to cinders due to
arcing (from whatever source) from a grounded nozzle touching an
ungrounded filler neck. The guy was pumping mogas from a barrel that
didn't have a ground wire attached.
My mogas tank has a weighted bare wire inside the tank connected to the
battery ground (12V pump) and a ground wire that goes to my exhaust
pipes. Another long ground wire goes to my hangar frame. It's a PITA
to hook it all up each time I fill the Pitts but I don't have a bucket
of cinders either. I just try to learn from others misfortune.
Linn
Rick wrote:
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After being battered by all the ground safety & QA types in the USAF, then becoming one......hmmmm, funny how that works, I was surprised to see the lack of grounding and bonding procedures in general aviation short of the line truck's cable wheel. I guess when you remove the electrically primed munitions and impulse cartriges from the mix grounding doesn't seem high on the list. I can tell you I have felt head smacking (F-4 centerline tank, bottom of fuselage very close to head) static electricity while pinning up aircraft after flight, prior to shut down. Imagine your surprise when you see that spark jump from the fuel nozzel to the tank opening as your getting ready to pump. I still can't walk up to an airplane without the words, "Aircraft positioned, chocked and grounded" going through my head.
Rick S.
40185
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