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drfred(at)suddenlinkmail.
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 Posted: Mon Mar 02, 2009 7:47 pm Post subject: Overhead vents |
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Paul;
As you know, I installed the overhead console from accuracy avionics. I
put two naca vents behind the aft bulkhead and used ducting to rout it
up into the console. I also made a fiberglass piece to fill in the gap
at the aft cover piece and up to the console. I get some airflow up to
the front with the overhead air outlet while on the ground and it is
quite ample when airborne. I rarely have it all the way open. I wonder
if one would have been enough. (Then one would have to go through the
mental gymnastics of which side to put it on given the rotational
component of the airflow secondary to a prop.)
I haven't ridden in the back seat yet, but over spring break I want to
get back there and look at sealing off the joint better. (wonder if I
could get any offers from someone to fly the plane for me ?? ) The rear
seat passengers (aka my wife) report a lot of air that comes out of the
corrugations around the back panel. I am assuming that it is secondary
to the pressure leaking around the joint and filling up the tail and
coming out the only place it can : under the corrugations.
I want to fly with the vents open and then plugged. I think that will
be a good test to see if air is coming in from some where else. (around
the tail then forward??).
Again, I started flying at the end of September, so I don't know how
well it will be in the summer here in Texas. I don't think it will be
as good as Alex D's air conditioning, but I didn't want the added
weight and complexity.
I'm glad I put the overhead in place, even with the leaking problem.
You feel cooler when you have air blowing in your face. The system
doesn't weigh much at all and gives ample area to run lighting wires
overhead. I think it is and was a little expensive, and if I did it
again, would really look at the overhead consoles out of the cars
mentioned in earlier posts.
I also want to bend up an aluminum bracket to hold the pilot/copilot
shoulder harnesses. There is no good place for them after you take them
off. They fall right into the back seat and confuse the hades out of
new passengers. They all want to hook them into their seat belts somehow.
I also need to add a couple more plate nuts to the overhead access
plate. It leaks around the edge from the pressure when all the vents
are closed.
I'll try to remember to write up a little report about what I've
found/fixed in a couple weeks.
I do plan to fly over to Sun 'n Fun Friday and Sat if anyone else on the
list wants to take a look.
And, I still have one set of axle extensions that my Dad machined to
specs on Tim Olsen's site. I'd sell em for $10 plus shipping if anyone
is in need of them. I had to fix a crack in one of the wheel pants
fairings after painting and checked both of them when I filled the tires
(with good ole Texas air). They are doing well.
Fred.
515FW
90 hrs
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Lew Gallagher
Joined: 04 Jan 2008
Posts: 402
Location: Greenville , SC
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| Posted: Tue Mar 03, 2009 5:13 am Post subject: Re: Overhead vents |
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Hey Fred,
I'm in Jacksonville, FL for the prostate cancer treatments (a minor inconvenience to fixing up stuff at the rental house and surf fishing), but I'd love to send you the $ for the axle extensions if you still have them.
Let me know. Later, - Lew
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_________________
non-pilot
crazy about building
NOW OFICIALLY BUILDER #40549
Fly off completed ! |
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gengrumpy(at)aol.com
Guest
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| Posted: Tue Mar 03, 2009 4:20 pm Post subject: Overhead vents |
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I have the same console.
Also experienced some problems with too much cold air coming in.
Solution:
1. Cut out small foam inserts to put into the external vents for the
overhead console (my winterization kit!).
2. Bought some fire rated foam from Abby and put between the
corrugated panels and the bulkhead, effectively killing the flow
around the corrugations.
Combination of the 2 was the key for me!
grumpy
N184JM
do not archive
On Mar 2, 2009, at 9:45 PM, Fred Williams, M.D. wrote:
| Quote: |
>
Paul;
As you know, I installed the overhead console from accuracy
avionics. I put two naca vents behind the aft bulkhead and used
ducting to rout it up into the console. I also made a fiberglass
piece to fill in the gap at the aft cover piece and up to the
console. I get some airflow up to the front with the overhead air
outlet while on the ground and it is quite ample when airborne. I
rarely have it all the way open. I wonder if one would have been
enough. (Then one would have to go through the mental gymnastics of
which side to put it on given the rotational component of the
airflow secondary to a prop.)
I haven't ridden in the back seat yet, but over spring break I want
to get back there and look at sealing off the joint better. (wonder
if I could get any offers from someone to fly the plane for me ?? )
The rear seat passengers (aka my wife) report a lot of air that
comes out of the corrugations around the back panel. I am assuming
that it is secondary to the pressure leaking around the joint and
filling up the tail and coming out the only place it can : under
the corrugations.
I want to fly with the vents open and then plugged. I think that
will be a good test to see if air is coming in from some where
else. (around the tail then forward??).
Again, I started flying at the end of September, so I don't know how
well it will be in the summer here in Texas. I don't think it will
be as good as Alex D's air conditioning, but I didn't want the added
weight and complexity.
I'm glad I put the overhead in place, even with the leaking
problem. You feel cooler when you have air blowing in your face.
The system doesn't weigh much at all and gives ample area to run
lighting wires overhead. I think it is and was a little expensive,
and if I did it again, would really look at the overhead consoles
out of the cars mentioned in earlier posts.
I also want to bend up an aluminum bracket to hold the pilot/copilot
shoulder harnesses. There is no good place for them after you take
them off. They fall right into the back seat and confuse the hades
out of new passengers. They all want to hook them into their seat
belts somehow.
I also need to add a couple more plate nuts to the overhead access
plate. It leaks around the edge from the pressure when all the
vents are closed.
I'll try to remember to write up a little report about what I've
found/fixed in a couple weeks.
I do plan to fly over to Sun 'n Fun Friday and Sat if anyone else on
the list wants to take a look.
And, I still have one set of axle extensions that my Dad machined to
specs on Tim Olsen's site. I'd sell em for $10 plus shipping if
anyone is in need of them. I had to fix a crack in one of the wheel
pants fairings after painting and checked both of them when I filled
the tires (with good ole Texas air). They are doing well. Fred.
515FW 90 hrs
|
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ricksked(at)embarqmail.co
Guest
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| Posted: Tue Mar 03, 2009 6:08 pm Post subject: Overhead vents |
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I spent the weekend at Redmond OR to get my 480 upgraded by Eric McDonald, one of the original builders of the overhead when he was at Accuracy. He is the avionics guru at Redmond Air and the real technical brains behind the now defunct Accuracy. Seems he had several discussions with a few builders and the conclusion was you only need one NACA vent. FWIW, Redmond Air is selling them and Eric has improved many of the parts. He's a very bright guy with a good company behind him. He took on the burden of helping Accuracy's customers with tech support because he cares about his product he built. They have experimental panels for all the RV's and the FBO was great to hang out at...I gladly picked up the tab for dinner Friday for all he did for me. If you're looking for avionics for your RV-10, you might want to give Redmond Air a shot....very nice facility and a great staff...
Rick Sked
40185
Sent via BlackBerry by AT&T
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rv(at)thelefflers.com
Guest
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| Posted: Wed Mar 04, 2009 4:35 am Post subject: Overhead vents |
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Makes sense about one naca vent. Has anyone that just used on vent flying
yet?
--
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bcondrey
Joined: 03 Apr 2006
Posts: 580
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| Posted: Wed Mar 04, 2009 5:00 am Post subject: Overhead vents |
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One is more than enough - if you've got 2 you'll want to block off some flow.
---
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