Hi William,
You might also try the following.
I have a cable bolted to the filler spout closure handle for my Jerry
cans and on the other end of the cable is a crocodile clip which I
connect to a small screw on the aircraft filler neck. The above allows
any charge to go through the cable to the can into the ground before
filling and there is a permenant connection between can and neck. No gap
= no spark!
Barry Tennant
D-EHBT
William Mills schrieb:
>
> Graham and All,
>
> IMHO this would be a very good subject to air on the forum. I have taken
> what I believe to be safety measurers, but it may not be sufficient. I have
> a copper wire ( the earth (or ground) wire from a domestic ring main type
> cable) that runs down inside the fuel hose into the tank and I hope touches
> the tank bottom. The other end is trapped between the top of the hose and
> the metal orifice. It is also linked to the fuel sight gauge vent to
> provide something on which to clip an external wire. It is also linked to
> the tail strobe earth wire so as to provide continuity to the aircraft earth
> system and to the exhaust pipe (airfield fuel pump earthing technique). I
> use steel jerry cans for refuelling with Mogas and I always try to touch the
> can on the vent pipe before filling so as to neutralise any voltage
> differential. Is this fool-proof, or can anyone suggest an improvement to
> this technique?
>
> Very best wishes to you all for a Happy Christmas and Safe Flying and
> Filling for the New Year,
>
> William
> ----- Original Message -----
> From: "Graham Singleton" <grasingleton@avnet.co.uk>
> Subject: static sparks
>
> > Evening All,
> > I thought this might be of interest, it came up on the canard forum.
> > Interesting what he says about metal cans. Sounds logical to me too
> > Graham
> >
> > NOT PROPER TERMINOLOGY
> > Please stop throwing around the words "Plastic Can". If the container is
> an
> > approved plastic type container it is NOT the type of plastic you would
> get
> > for say food storage. The container does have a CONDUCTIVE nature to it
> that
> > is there to drain/bleed off static charges.
> > That does not mean a spark, a match or a dumb idiot with a cigarette will
> not
> > cause the gas to ignite.
> > Will a Static Spark cause the gas to ignite even if it were in a steel
> can?
> > YES!
> > A steel can is even MORE susceptible to SPARKING. Do you know why? Because
> > it does NOT Drain/Bleed off the static, it COLLECTS the charge in ONE
> LARGE
> > DISCHARGE.
> > Remember Ohm's Law, if the Resistance decreases the current will increase
> and
> > since Static is NOT a fixed voltage if the resistance decreases and the
> spark
> > gap remainds the same the Voltage will increase. It is the Voltage that
> > bridges the gap and it is the voltage that when added to the fule/air
> mixture
> > things go boom!
> > For those so prone to follow their OLD military ways... Have you checked
> to
> > see what the military is using today? PLASTIC... Conductive Plastic!
> > For as much as you try to teach, and Yes, even litigate you cannot make
> > everyone safe. There is not enough pen & ink in the world to do that.
> There
> > is such a thing as the Darwin Awards, maybe it is the Law of Nature
> fighting
> > back against litigation and redundant emails to insure only future
> > generations that use their God given gray mater will survive.
> > I'm sure we ALL can agree that sparks, matches or a dumb idiot with a
> > cigarette, can and will ignite gas and start forest fires. But lets STOP
> > with the Flagrant use of the word Plastic. Pay attention to the Proper
> > Fueling Procedures. Even fuel pumps have rubber hoses ... Conductive
> Rubber
> > hoses.
> > For the fun of it check out the term ESD and ESD Procedures.
> > (Electro-Static Discharge)
> >
> > Barry
> >
>
> ----
>
> >
> > ---
> > Version: 6.0.427 / Virus Database: 240 - Release Date: 06/12/2002
> >
>
> ----
>
> >
>
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