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Tim Juhl
Joined: 21 Mar 2006 Posts: 488 Location: "Thumb" of Michigan
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Posted: Sat Apr 14, 2007 3:19 pm Post subject: NACA Scoop in cowl |
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I'm attending an EAA workshop on working with composites this weekend. I'm most interested in knowing the tricks to finishing off the cowl that came with my Jabiru FWF kit. Regarding installing NACA scoops in the fiberglass cowling, the instructor asked a question which I couldn't answer so I'm tossing it out to the group.
When installing the NACA scoop, aerodynamically is it better to square off the edge (sharp right angle) where the cowl joins the scoop or sand a nice radius on it?
Thanks!
Tim
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Zodiac XL - Jabiru 3300A
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Jaybannist(at)cs.com Guest
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Posted: Sat Apr 14, 2007 3:48 pm Post subject: NACA Scoop in cowl |
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Tim,
There is lots of stuff on the internet about NACA duct entrances. Google it. I have reviewed some of it and to me, it appears that most of the fine points are for greater efficiency at higher airspeeds. I personally don't think that there is anything critical about installation on a Zodiac. (My very humble opinion)
Jay in Dallas
Do not archive
"Tim Juhl" <juhl(at)avci.net> wrote:
Quote: |
I'm attending an EAA workshop on working with composites this weekend. I'm most interested in knowing the tricks to finishing off the cowl that came with my Jabiru FWF kit. Regarding installing NACA scoops in the fiberglass cowling, the instructor asked a question which I couldn't answer so I'm tossing it out to the group.
When installing the NACA scoop, aerodynamically is it better to square off the edge (sharp right angle) where the cowl joins the scoop or sand a nice radius on it?
Thanks!
Tim
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DO NOT ARCHIVE
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CFII
Champ L16A flying
Zodiac XL - Jabiru 3300A
Working on wings
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