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edgraydallas
Joined: 13 Jun 2008
Posts: 74
Location: Dallas, Tx
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 Posted: Mon Jun 16, 2008 5:53 pm Post subject: Gap sealing |
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I am building a model II with Rotax 582, no. 605. My book gives no guidance on gap sealing. I intend to use airfoil ribs in elevator, rudder and stabs. What can anyone tell me about gap sealing for the elev. and rudder. Also, I have 2 six gallon wing tanks and the 1.5 gal. header tank which I am planning on mounting behind the firewall. All advice appreciated. Ed Gray
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Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
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| Posted: Mon Jun 16, 2008 10:37 pm Post subject: Gap sealing |
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At 06:53 PM 6/16/2008, you wrote:
| Quote: | What can anyone tell me about gap sealing for the elev. and rudder.
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It's a good idea. I have a simple flange type gap seal for the
rudder, (since I want it to look sealed,) and use the reversed clear
packing tape to seal the elevator. Both work great, and the elevator
seal made a significant, beneficial, difference.
| Quote: | Also, I have 2 six gallon wing tanks and the 1.5 gal. header tank
which I am planning on mounting behind the firewall.
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So you'll have about 2.9 hours (250 miles) of cruise fuel. (No
reserve.) I have 27 gallons and regularly use 4.5 hours of it. (21
gallons.) I don't think I'd want to sit any longer, but I think I
have more range than the Rans I fly with. I'm guessing you'll be fine.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
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Guy Buchanan
Deceased K-IV 1200
A glider pilot too. |
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dave
Joined: 22 Sep 2006
Posts: 1382
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| Posted: Tue Jun 17, 2008 1:55 am Post subject: Re: Gap sealing |
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| Quote: | Quote:
Also, I have 2 six gallon wing tanks and the 1.5 gal. header tank
which I am planning on mounting behind the firewall.
So you'll have about 2.9 hours (250 miles) of cruise fuel. (No
reserve.) I have 27 gallons and regularly use 4.5 hours of it. (21
gallons.) I don't think I'd want to sit any longer, but I think I
have more range than the Rans I fly with. I'm guessing you'll be fine.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
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Guy, With 13 .5 US galllons on board you would not see over 2.5 hours duration since the average fuel flow is about 5.4 gallons / hour . Your numbers would give an average of 4.65 gal./hour which is low unless you are cruising at I would guess about 5500 rpm and in that case would see only about 75 to 80 mph MAX in a Kitfox IV. A Kitfox 2 is slower that a model IV as well with the under-cambered wing and with out the leading edge cap. A Kitfox 2 is likely to not see over 80 mphunlesss it has wing strut fairings as well.
Hope this clears up the confusion ,
Dave
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msm_9949(at)yahoo.com
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| Posted: Tue Jun 17, 2008 5:49 am Post subject: Gap sealing |
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Hi Ed.
My model 2 (s/n 374) was 95% built when I got her so those decisions were already made. As for gap seals, clear 2" "Frost King" tape, overlapped 1" sticky side to sticky side and applied in an "S" configuration works great.
I'd leave out the 6 gal passenger side wing tank and replace it with a 13 gal to increase range. The 582 is a good engine but it uses about 4.5 g/hr at cruise. I'd use the new poly tanks now available rather than the fiberglass ones you probably have.
I suspect you'll be adding some weight to the tail feathers with built-in gap seals and airfoil ribs. Most header tanks are mounted behind the seat. Put yours wherever it's needed to get the W&B right with the mods you're making. If you wind up puttting the header up front, put a small baggage compartment behind the seat.
Good luck and have fun.
Marco Menezes N99KX
Hersey, MI
M2; 582-90; C-Box 3:1
--- On Mon, 6/16/08, edgraydallas <egraylaw(at)swbell.net> wrote:
[quote]From: edgraydallas <egraylaw(at)swbell.net>
Subject: Gap sealing
To: kitfox-list(at)matronics.com
Date: Monday, June 16, 2008, 9:53 PM
[quote]--> Kitfox-List message posted by: "edgraydallas" <egraylaw(at)swbell.net> I am building a model II with Rotax 582, no. 605. My book gives no guidance on gap sealing. I intend to use airfoil ribs in elevator, rudder and stabs. What can anyone tell me about gap sealing for the elev. and rudder. Also, I have 2 six gallon wing tanks and the 1.5 gal. header tank which I am planning on mounting behind the firewall. All advice appreciated. Ed Gray Read this topic online here: http://forums.matronics.com/viewtopic.php?p=188212#188212 [quote][b]
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Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
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| Posted: Tue Jun 17, 2008 7:34 am Post subject: Gap sealing |
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At 02:55 AM 6/17/2008, you wrote:
| Quote: | Guy, With 13 .5 US galllons on board you would not see over 2.5
hours duration since the average fuel flow is about 5.4 gallons /
hour . Your numbers would give an average of 4.65 gal./hour which
is low unless you are cruising at I would guess about 5500 rpm and
in that case would see only about 75 to 80 mph MAX in a Kitfox
IV. A Kitfox 2 is slower that a model IV as well with the
under-cambered wing and with out the leading edge cap. A Kitfox 2
is likely to not see over 80 mphunlesss it has wing strut fairings as well.
Hope this clears up the confusion ,
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Dave,
You get 5.4 gph, I get 4.7 at 5900 rpm, verified over
several very long trips. (Note that this fuel flow is average for 3.5
- 4.5 hour flights, not around the patch.) You are correct, though,
that I have a IV. I didn't know Ed had a 2, and don't know what he
cruises at. I know I flight plan for 80 mph with my IV.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
| | - The Matronics Kitfox-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kitfox-List |
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_________________
Guy Buchanan
Deceased K-IV 1200
A glider pilot too. |
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