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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 26320
Location: Livermore CA USA
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 Posted: Tue Oct 21, 2008 8:34 pm Post subject: Fresh Air Duct Routing... |
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Dear Listers,
What is the consensus on routing the front fresh air ducts? I added an optional right side SV-1 NACA vent too. Looking at where to route the 2" duct seems to be either down and around the gear tower and second bulkhead, kind of directly in the foot/leg area, or just to go directly through the second bulkhead. The later would require a couple of lightening holes punched in the bulkhead. I'm not sure this is kosher, though. Thoughts?
I just realized that adding that right-side NACA vent kind of limits the utility of baggage area, now doesn't it...? I thought that Van's didn't punch the right side as a part of the "keep it under 50%" rule that I keep running into... Well, at least I'll have lots of fresh air!
Matt Dralle
RV-8 # 82880
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Matt Dralle
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N8RV(at)gte.net
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| Posted: Wed Oct 22, 2008 4:34 am Post subject: Fresh Air Duct Routing... |
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Matt, most people I've talked to about fresh air concerns claim that there's
an abundance of fresh air that comes through the two planned routes.
Additional air sources seem to not be needed. Plus, as you already
mentioned, you lose valuable baggage space.
If there's one thing I've learned (the hard way) from 12+ years of building,
it's that the designers at Van's aren't dummies. If the plans call for one
thing and not another, there's always a reason. I've tried to change things
because I thought I had a better idea, and I've always learned that I'm
wrong and Van's is right. Admittedly, I'm not the sharpest knife in the
drawer, either.
Good luck. Looks like you're coming along nicely.
-- Don McNamara
N8RV
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flyinwithme99(at)yahoo.co
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| Posted: Wed Oct 22, 2008 7:24 am Post subject: Fresh Air Duct Routing... |
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My LH fresh air scat duct runs through a partition that I built in the LH footwell area, (just like the partition on the RH side that creates the lower baggage area). I cut a hole in the upper portion of the fabricated partition, and ran the hose through it and around the inboard side of the LH gear tower, then up to the eyeball vent in the LH outermost portion of the instrument panel.
I would not cut any holes of this size in the gear tower.
--- On Tue, 10/21/08, Matt Dralle <dralle(at)matronics.com> wrote:
| Quote: | From: Matt Dralle <dralle(at)matronics.com>
Subject: Fresh Air Duct Routing...
To: rv8-list(at)matronics.com
Date: Tuesday, October 21, 2008, 11:33 PM
| Quote: | Dear Listers,
What is the consensus on routing the front fresh air ducts? I added an
optional right side SV-1 NACA vent too. Looking at where to route the 2"
duct seems to be either down and around the gear tower and second bulkhead, kind
of directly in the foot/leg area, or just to go directly through the second
bulkhead. The later would require a couple of lightening holes punched in the
bulkhead. I'm not sure this is kosher, though. Thoughts?
I just realized that adding that right-side NACA vent kind of limits the
utility of baggage area, now doesn't it...? I thought that Van's
didn't punch the right side as a part of the "keep it under 50%"
rule that I keep running into... Well, at least I'll have lots of fresh
air!
Matt Dralle
RV-8 # 82880 |
|
[quote][b]
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japhillipsga(at)aol.com
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| Posted: Wed Oct 22, 2008 4:13 pm Post subject: Fresh Air Duct Routing... |
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Matt, your leap may have a great benefit. That could be used for one of those portable AC units I saw at SnF. Bill
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