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Michael Wynn
Joined: 10 Jan 2006
Posts: 148
Location: San Ramon, CA
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 Posted: Thu May 25, 2006 3:04 pm Post subject: Tank Plumbing |
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Hi folks,
I am finishing up my fuel tanks and ran into a couple of questions. The
vent line comes out of the inboard rib with a 90 degree turn. Which way should
that angle face? I saw one picture on (Dan Checkaway's site?) that had it
facing forward and slightly down, paralleling the curvature of the leading
edge. I asked Van's and they were pretty vague. Thoughts? I am a little
unclear as to where that eventually gets attached.
Is anyone putting proseal along the course of the vent line where it passes
through the ribs? I couldn't see any overwhelming reason to do so, unless it
would reduce rattle or chaffing.
When you put the fittings connecting the vent tube, fuel pickup, etc
together, there are pictures of folks prosealing the outside. Do you also put the
proseal in the threads as a thread lock? How tight does one make these
connections. I am not sure if there is a torque spec. If so, how do you measure
it? I would think just good and tight with proseal as a thread locker (and
safety-wired on the fuel pickup).
I am also finished with the leading edges and was thinking about riveting
them on. Any reason that I need to have the tanks completely done before I do
that?
Thanks in advance for the usual good advice.
Michael Wynn
RV 8 Wings (tanks)
San Ramon, CA
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_________________
Michael Wynn
RV 8
San Ramon, CA |
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dan(at)rvproject.com
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| Posted: Thu May 25, 2006 3:38 pm Post subject: Tank Plumbing |
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| Quote: | I am finishing up my fuel tanks and ran into a couple of questions. The
vent line comes out of the inboard rib with a 90 degree turn. Which way
should
that angle face? I saw one picture on (Dan Checkaway's site?) that had
it
facing forward and slightly down, paralleling the curvature of the
leading
edge. I asked Van's and they were pretty vague. Thoughts? I am a
little
unclear as to where that eventually gets attached.
|
Use an angle that won't make it difficult to connect the thing. It's vague
because there's no hard and fast requirement for anything specific.
Literally, don't sweat it! As long as it's not pointed up at the flange of
the root rib & skin, you won't have an issue.
| Quote: | Is anyone putting proseal along the course of the vent line where it
passes
through the ribs? I couldn't see any overwhelming reason to do so, unless
it
would reduce rattle or chaffing.
|
No, I didn't. If you ever needed to get the vent tube out for some reason,
you'd be shooting yourself in the foot. That said, I don't see any reason
why you'd need to get it out.
| Quote: | When you put the fittings connecting the vent tube, fuel pickup, etc
together, there are pictures of folks prosealing the outside. Do you also
put the
proseal in the threads as a thread lock? How tight does one make these
connections. I am not sure if there is a torque spec. If so, how do you
measure
it? I would think just good and tight with proseal as a thread locker
(and
safety-wired on the fuel pickup).
|
I didn't use any proseal on any threads that I can recall. I did proseal
all over the bulkhead nuts on bulkhead fittings, and did make a fillet
around every pass-through where something passed through exterior surfaces.
Put it this way...now that the fuel tank SB has reared its can-o-worms head,
if you had completed a tank and had used proseal on the threads, you would
be HATIN' it. Just my 2 cents. It's bad enough (good enough?) with proseal
AROUND the fitting, let alone in the threads. Imho.
| Quote: | I am also finished with the leading edges and was thinking about riveting
them on. Any reason that I need to have the tanks completely done before
I do
that?
|
Not that I'm aware of.
)_( Dan
RV-7 N714D (914 hours)
http://www.rvproject.com
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http://www.matronics.com/Navigator?RV-List |
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