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dosmythe(at)cox.net
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 Posted: Fri Jun 16, 2006 11:18 am Post subject: Pics of Don's mod |
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I finally made a couple pics of my cowl/radiator mods. Not too good at
sending pics so hope this works without making the list manager mad.
Pic 1198 New white paint scheme on wing tops after replacing all the 2"
tapes.
Pic 1196 is a side view. Note engine cowl is "ALL" one piece w/ hinged
access door on top.
Pic 1193 is another front view. Note horizontal isolation near the bottom
of the large round opening. This is a seperate isolated air inlet for the
muffler mounted heater box.
Pic 1191 is a front view with good shot of short exhaust section and side
engine cowl vents
Don Smythe
Hope this works
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dan(at)azshowersolutions.
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| Posted: Fri Jun 16, 2006 12:21 pm Post subject: Pics of Don's mod |
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Don, Very nice looking mod...I haven't been folowing this thread, so forgive if I ask a redundant question. My curiosity lies with drag. You are in effect faring the spring gear so did you notice an increase or decrease in the drag?
Dan Billingsley
Don Smythe <dosmythe(at)cox.net> wrote:
| Quote: | I finally made a couple pics of my cowl/radiator mods. Not too good at
sending pics so hope this works without making the list manager mad.
Pic 1198 New white paint scheme on wing tops after replacing all the 2"
tapes.
Pic 1196 is a side view. Note engine cowl is "ALL" one piece w/ hinged
access door on top.
Pic 1193 is another front view. Note horizontal isolation near the bottom
of the large round opening. This is a seperate isolated air inlet for the
muffler mounted heater box.
Pic 1191 is a front view with good shot of short exhaust section and side
engine cowl vents
Don Smythe
Hope this works
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dosmythe(at)cox.net
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| Posted: Fri Jun 16, 2006 1:40 pm Post subject: Pics of Don's mod |
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Dan
I'd have to say if anything, it gained a little speed. Some people like to talk about 2 or 3 MPH difference. My airspeed varies that much depending if I carry my lunch with me or not. For instance, today I was indicating 90 MPH (at) 5800. Yesterday it was only indicating maybe 85 (at) 5800. 80-85 is the norm so, my speed might be up a couple MPH. At least, it didn't go down and my cooling is much improved (I think). Tomorrow we're going to a fly in and it's supposed to be around 95 degrees. This should test things better.
Don Smythe
[quote] ---
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Joe George
Joined: 10 Jan 2006
Posts: 3
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| Posted: Fri Jun 16, 2006 3:26 pm Post subject: Pics of Don's mod |
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| Quote: | I finally made a couple pics of my cowl/radiator mods
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++++ Please.... too many and too large. I have dial up that auto-loads all
e-mails and attachments.
Joe
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dosmythe(at)cox.net
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| Posted: Fri Jun 16, 2006 4:29 pm Post subject: Pics of Don's mod |
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Sorry Joe and others.
No more attachments until I become educated.
Don Smythe
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janderson412(at)hotmail.c
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| Posted: Fri Jun 16, 2006 6:27 pm Post subject: Pics of Don's mod |
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Hey, an idea for you dial up guys is to get a Hotmail or Yahoo address just for list/s, then you just get the mail and your choice if you want to d/load attachments. Keeps you safe from dirty viral ones too. Don, you're att were not large. John A.
[quote]
From: "Don Smythe" <dosmythe(at)cox.net>
Reply-To: kitfox-list(at)matronics.com
To: <kitfox-list(at)matronics.com>
Subject: Re: Pics of Don's mod
Date: Fri, 16 Jun 2006 20:07:55 -0400
--> Kitfox-List message posted by: "Don Smythe" <dosmythe(at)cox.net>
Sorry Joe and others.
No more attachments until I become educated.
Don Smythe
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bnn(at)nethere.com
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| Posted: Sun Jun 18, 2006 8:39 pm Post subject: Pics of Don's mod |
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At 10:27 AM 6/18/2006, you wrote:
| Quote: | I think 3 to 1 would be good Don for exit of cowl air.
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The 3:1 will only assure that all the air that comes in meets least
resistance going out. However there's no requirement that you have such a
ratio. Indeed, you will have far less drag if you only allow the bare
minimum to exit, and therefore enter, the cowl. This is how cowl flaps
work. With the Kitfox's nice rounded cowl the drag will be far lower if you
discourage air from entering than if you had a huge exit to try to pass all
the air that hits that big inlet. Indeed it would be an interesting
experiment to close off all exits, (smoothly, of course,) and see what
speed results. (I know that a little in-cowl cooling is desirable,
particularly if you have the voltage regulator forward of the firewall,
like I do, but I'll bet it's extremely small. Ever seen a snowmobile
installation?)
Guy Buchanan
K-IV 1200 / 582-C / Warp / 99.9% done, thanks mostly to Bob Ducar.
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dave(at)cfisher.com
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| Posted: Mon Jun 19, 2006 3:10 am Post subject: Pics of Don's mod |
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Guy,
I think the biggest culprit on the Kitfox cowl is the larger size of the
opening allowing more in air in that necessary. I think 25 to 30 sq
inches would be plenty with an exit of 50 to 75 sq in exit. Has anyone
meaurered the actual size ? I would tend to think that we are closer to 1
to 1 right now on standard cowl which if so would be a slight drag
producer.
Dave
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