REFLECTOR: Fw: [Canards] Static discharge

[larry]

??Can't this grounding of the fuel pool be accomplished by simply grounding 
the fuel lines??

At 07:42 PM 8/8/2004, you wrote:
>Does anyone know if the Jeffco 9700 tank coating has any significant 
>electrical conductivity?  I installed a ground wires from my fuel cap 
>rings to the strake-tip tiedown rings and on to the aircraft's electrical 
>system ground.  The idea is that the lineman's ground clip can then be 
>attached to one of the the tiedown rings, which is electrically equivalent 
>to attaching it to both of the fuel cap rings.  However, I have not 
>installed anything to electrically ground the fuel pool itself.  I wonder 
>if it is really necessary?  My hope is that the Jeffco will bleed the 
>charge off the fuel to the grounded vent lines and/or fuel cap rings.
>
>Keith Hallsten
>----- Original Message -----
>From: <mailto:LGallup at mn.rr.com>Lynn Gallup
>To: <mailto:reflector at tvbf.org>Velocity Aircraft Owners and Builders list
>Sent: Friday, August 06, 2004 7:57 AM
>Subject: Re: REFLECTOR: Fw: [Canards] Static discharge
>
>Ron,
>Man! That was a REALLY interesting note about refueling. I have considered 
>myself a fairly well informed engineer but I never knew that in a plastic 
>airplane it was the static electricity building up on the fuel itself 
>which was the source of the spark. I always thought it came off the wing 
>surface.
>
>So, if I am going to carry the aligator clip thing to bond the fuel nozzle 
>to the braid attached to the cap, why can't I just carry a length of braid 
>with a wire and clip attached. I could just drop this in the tank and 
>connect it when I refuel.
>Lynn
>
>
>----- Original Message -----
>From: <mailto:romott at adelphia.net>Ronnie Brown
>To: <mailto:reflector at tvbf.org>reflector at tvbf.org
>Sent: Thursday, August 05, 2004 2:16 PM
>Subject: REFLECTOR: Fw: [Canards] Static discharge
>
>The second note.
>
>----- Original Message -----
>From: <mailto:alex157 at direcway.com>Alex Balic
>To: <mailto:Canards at tnstaafl.net>Canards at tnstaafl.net
>Sent: Thursday, August 05, 2004 1:26 PM
>Subject: [Canards] Static discharge
>
>I am interested in this thread- I am not sure how touching the fuel with a 
>conductor will help any static discharge condition, the fuel is non 
>conductive, the static problem that we are all familiar with is not a 
>charge difference between the fuel and the filler nozzle, it is between 
>the filler nozzle and a conductive part of the aircraft - like an aluminum 
>fuel cap, or filler cap ring, which can store charge, and dissipate it to 
>the nozzel at a very inopportune time. What needs to be done is to ground 
>the cap and filler ring to the aircraft grounding system, not to the 
>fuel.   As far as the screens go, their function is as a flame arrester, 
>they function by not allowing the flame front  to pass through to the main 
>fuel source (your tank) they do this by dissipating the energy from the 
>flame front.  I have seen a demonstration of an osha gas can where the 
>demonstrator held a burning propane torch right at the opening to a full 
>can of gasoline, and no significant combustion occurred (I still think 
>that guy was nuts).  For anyone that is looking for ball chain, home 
>depot, lowes, and ace hardware sell it by the foot- it is the same stuff 
>that is used for turning ceiling fans on and off- get the stainless steel.
>I would instruct and/or placard for the  fueling personnel to "touch here" 
>the fuel nozzle or grounding cable from the truck to the gas cap before 
>opening it to dissipate any built up charge.
>
>
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