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smokey_bear_40220(at)yaho
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 Posted: Sat Jun 03, 2006 10:01 pm Post subject: Wing tanks - Was West System Epoxy answer |
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One thing to remember when using bladders is that all
corners, high and low, of a bladder must be fastened.
If not, the bladder can move in its space whenever the
tank is not full, and this will cause problems. Fuel,
or water can be trapped in bottom folds. The tank can
divide itself into compartments. Your 1/2 full tank
can become 1/4 usable. Your 1/2 full tank may not be
really that full if the bladder slides inboard.
Moving the bladder in flight will cause wear.
However you do it, you must stabilize the bladder to
make it a true tank. That means you need enough
access and a method of mounting that doesn't tear the
bladder. Don's 12" sq hole might work if it is
planned well and you can get both arms to all corners,
but you have to close it with something that doesn't
poke the bladder too.
The only bladders I delt with had to be tied in place
with cords by reaching between the bladder and outer
shell.
kurt S.
--- Don Smythe <dosmythe(at)cox.net> wrote:
| Quote: | Guy,
Like I said the other day, you would probably
have to cut an access hole
in the tops of the tanks in order to be able to
reach all the insides. The
hole might have to be 12 inches square or whatever
it takes to reach all the
insides. Could possibly be done. After that, just
fabricate an aluminum
plate for the hole and attach with flush screws.
This is just a thought in
case many of us might have to make drastic changes
due to ethanol or
whatever. I personally would rather consider this
type approach than doing a blanket tank change out.
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dosmythe(at)cox.net
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| Posted: Sun Jun 04, 2006 4:07 am Post subject: Wing tanks - Was West System Epoxy answer |
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Kurt,
That does make a bladder install much more difficult. It might still be
doable with a well thought out installation kit???
Don Smythe
Do Not Archive
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smokey_bear_40220(at)yaho
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| Posted: Sun Jun 04, 2006 9:58 pm Post subject: Wing tanks - Was West System Epoxy answer |
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Yes Don,
I was trying to come up with a way the bladder could
have an expanding frame like those self errecting
tents or windshield sun shades. Some way that would
not cause it to get poked or wear yet let the frame
hold it in place. you might have to adjust it as you
install it, but then it would stay put?
Be nice if you could put a bladder in, then spray in
the expanding foam like that is used in racing tanks.
It would inflate to fit and be really better. But
does that foam expand?
Just a thought....
Without the internal baffles I think the tank would
need external ribs for stiffness.
Kurt S.
--- Don Smythe <dosmythe(at)cox.net> wrote:
| Quote: | Kurt,
That does make a bladder install much more
difficult. It might still be doable with a well
thought out installation kit???
Don Smythe
Do Not Archive
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