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Gas Cap Mod

 
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8wn(at)comcast.net
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PostPosted: Fri May 29, 2009 2:29 pm    Post subject: Gas Cap Mod Reply with quote

Steve,

Sorry I did not send out the mod earlier but waited for this months news
letter to publish it. My Kit was #26 and at time Arion was using a different
housing but same cap. Everything is the same as the one I did the mod on
except it has a deeper (longer) throat. My kit came with the deeper throat,
see the last picture in my article, that is the one that can be modified
after being installed. If you have this fuel filler housing then you can use
the same parts with a minor change. Not having been fueled yet you should
try something.

Use a long 1/8" drill and drill hole in the location as shown in the last
picture (picture that shows the housing installed in the wing). You will
have to drill at an angel, try to use a center punch before drilling. You
can enlarge the hole to 1/4" and then use a SS 1/4" screw and MS21042 nut
to hold. To Hold the nut inside the tank I bent with torch a long box
wrench into a "U" shape and taped one end of the wench box end to hold the
nut. The longer old style housing keeps the cable away from the cap and
works well. You do not have to countersink the hole on this type housing.
This is how I did the mod without too much work, As with anything there has
to be a better way to do a mod and I hope someone cam come up with a better
way and will share it.

After reading the article form Walt I would think that this would work.
You could clean out a small 1/4" wide grove in the wing against the housing
then drill a 3/16" hole into the tank. Pull the cable through and lay about
1/2" length in the grove against the housing and glass in place. Test with
ohm meter for good ground between housing and other end of cable. It may
work even if the housing dose not have a 100% ground. If painted do not cut
a grove just drill 1/4" hole against housing and install cable with flox
into wing and bolt other end to cap as shown. I think it would work.
I'm sure someone can come up with a simple mod that will work and can be
done on aircraft flying. Lets hear some ideas. Find a better way to do it,
there is always a better way!

Walt, good article
http://www.esdjournal.com/articles/Smallwood/Controlling%20Electrostatic%20Ignition%20Hazards%20final.pdf

Johnny Thompson


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