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"Kestrel 3D" for Scratchbuild Contest #2

Old 09-08-2008, 03:10 AM
  #1  
tzyoung
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Default "Kestrel 3D" for Scratchbuild Contest #2

Hello Everyone,
Someone mentioned this contest to me at the flying field today and suggested I check it out as I have a new scratch build in the works. This will be a 3D style plane with a full fuse and folded wings. All made of fanfold foam. The wingspan will be roughly 32 in. So far this plane exists only in CAD and I will be doing the initial build and finishing the plans as I go. Here is a teaser pic of a very rough sketch in my CAD file of what the plane will look like.

Enjoy
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Old 09-08-2008, 03:27 AM
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Rabbitcreekok
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Hello TZ and welcome to WattFlyer and the Scratchbuild contest. I look forward to seeing your build as it progresses.
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Old 09-08-2008, 03:37 AM
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Larry3215
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Darn! More competition! Talented competition at that it looks like!

Welcome and good luck
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Old 09-08-2008, 05:42 AM
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tzyoung
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Thanks everyone,
I am glad to be doing a build for a contest as it gives me motivation to finish it in a timely manner. I should have some updates to post in the next few days if I can find the time to build and post between school and everything else.
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Old 09-08-2008, 11:23 PM
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Good luck there TZ
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Old 09-09-2008, 06:16 AM
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tzyoung
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I kind of have some progress to report. I have built my wing spars. They are constructed of a high tech carbon composite (chemical formula C<sub>6</sub>H<sub>10</sub>O<sub>5</sub>) ten points to anyone that gets that one . But really they are a simple and humble balsa I beam tapered to define the shape of the foam skin that will be folded around them. Also included is the LG that will be used. I cant remember where they came from but it was in one of my boxes of stuff laying around. Maybe I can start cutting some foam soon.

<sub> </sub>
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Old 09-16-2008, 01:28 AM
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Hello,
I have got a little bit more done on the Kestrel in the past few days. School is kinda taking all of my time and my friends are getting the rest, but I have made a little headway in my efforts.
I promise that this plane is going to be a foamy, but the internal structure pictured is designed to spread out the motor, landing gear, and wing loads to the foam skin without any nasty point loads on the foam. It's a new technique I am trying out. If I like it, you guys might see it again on some of my other designs.

I'm gonna get back to building now

-Trent
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Old 09-16-2008, 03:55 AM
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Originally Posted by tzyoung View Post
Hello,
I have got a little bit more done on the Kestrel in the past few days. School is kinda taking all of my time and my friends are getting the rest, but I have made a little headway in my efforts.
I promise that this plane is going to be a foamy, but the internal structure pictured is designed to spread out the motor, landing gear, and wing loads to the foam skin without any nasty point loads on the foam. It's a new technique I am trying out. If I like it, you guys might see it again on some of my other designs.

I'm gonna get back to building now

-Trent
Hi Trent and Welcome to Wattflyers, Good luck to you on your build and Maiden, Take care, Chellie
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Old 09-16-2008, 04:31 AM
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tzyoung
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Thanks, Chellie

here are the pictures from my fairly productive build session tonight. The last pictures give an idea of how the internal mechanics are laid out.

-Trent
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Old 09-21-2008, 05:06 AM
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I managed to get a little building done today. Here are some build pics of the wing building. The wing panel is folded around the I-beam spar and glued at the trailing edge. This forms one of the stiffest, best airfoiled wing I know how to make from fanfold.

Enjoy,
-Trent
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Old 09-21-2008, 05:33 AM
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Looking good!
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Old 09-21-2008, 12:59 PM
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CHELLIE
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Originally Posted by tzyoung View Post
I managed to get a little building done today. Here are some build pics of the wing building. The wing panel is folded around the I-beam spar and glued at the trailing edge. This forms one of the stiffest, best airfoiled wing I know how to make from fanfold.

Enjoy,
-Trent
Your plane is looking great, hmmm, I see a Veteran plane Builder here keep up the great Work, Chellie

BTW, do you want to Race my contest jet Build for Drinks? Looser Buys, and I dont care If I Win or Lose, as long as the Drinks are cold
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Old 11-27-2008, 07:03 AM
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Here are some pictures of my progress on this build. I finally stole a little time from working on senior design to attach the wings tail and turtledeck.

enjoy,
-Trent
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Old 11-27-2008, 02:47 PM
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starcad
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Really nice build and nice technique on the wing design. Gives me ideas on some future projects on wing attachment and design.

BTW, in reference to one of the posts above, I have to say that everyone lurking and posting in this forum board is a very talented modeler/builder. Everyone here has something different in the way they approach new concepts implying different methods to achieve the desired results. If your a newbie or an old, Well, like me and want to learn how to design and build models or learn something new, this is the place to be.
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Old 12-14-2008, 07:50 PM
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tzyoung
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I finally finished boxing out the fuselage, installing the bottom hatch and began shaping a cowl. The cowl started as a box built out of fanfold scraps which i tack glued to the fuselage and began rough shaping. There will be a 1-1/2 spinner on this bird so i will likely install that before shaping much further.
Also the two completely unrelated pictures attached to this post are there to inspire opinions about how this plane should be finished. The first is done with fiberglass and polycrylic and painted. The second is film covered. I would like everyone to weigh in and help me decide how I should cover/paint this one.

Thanks
-Trent
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Old 12-22-2008, 06:56 AM
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Here are a few more build pics that I hope will speak for themselves. I decided to go down the fiberglass/polycrylic/paint finish road instead of the the iron-on film. The fuse is glassed and undergoing the several coats minwax needed to get a smooth surface.
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Last edited by tzyoung; 12-22-2008 at 08:22 PM.
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Old 01-01-2009, 02:21 AM
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Well guys,

It has been fun trying to get a model ready by the contest deadline, but other commitments have made it impossible to finish this in time. Good luck to all of the other contestants and I look forward to seeing and voting in this contest.

I will continue to post progress here as I get things done.

-Trent
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