Scratch build : #905 Mustang

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Scratch build : #905 Mustang

Postby Sai1704 » Thu Sep 19, 2013 4:19 am

So, as you all know, I have built a mustang in the past but it doesn't fly. So I'm planning on building another using the plans I have. I have already drawn out the templates, and I am going to build it with 1mm / 3/64" balsa ( this weekend? ).
http://m1316.photobucket.com/albumview/ ... l?newest=1
http://m1316.photobucket.com/albumview/ ... l?newest=1
Anirudh
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Re: Scratch build : #905 Mustang

Postby WIDDOG » Thu Sep 19, 2013 4:31 am

Hi Anirudh

Excellent build thread you got here. I am very interested and will be following this build very closely. I hope you post plenty of pictures. If I remember correctly you built your original Mustang with kit wood. If possible could you measure the wood your are now using and punch the numbers into this calculator. http://www.nclra.org/Programs/BalsaDensity.php and post the results?
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Re: Scratch build : #905 Mustang

Postby Sai1704 » Thu Sep 19, 2013 4:42 am

Sure, I will. But I don't thing I can get started until the weekend. Meanwhile, I am making a spinner out of some balsa I have
Anirudh
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Re: Scratch build : #905 Mustang

Postby Sai1704 » Thu Sep 19, 2013 11:31 pm

I made a solid spinner by cementing several discs together and sanding it down. I plan to attach the propeller by drilling holes on either side.
Image
Not a great job :?
Last edited by Sai1704 on Mon Sep 23, 2013 8:21 am, edited 1 time in total.
Anirudh
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Re: Scratch build : #905 Mustang

Postby Sai1704 » Sat Sep 21, 2013 10:41 am

I have purchased the balsa sheets, they are 1.5 mm in thickness. So the dimensions are 48"x4"x9/128"
Sheet 1 weighs 33.5 g, inconsistent grain but rigid, density: 11.26 lb/f^3.
Sheet 2 weighs 28.3 g, fairly consistent graing, but not so rigid, density: 9.51lb/f^3.
Certainly not contest grade wood. But I believe it is good enough for flying
Build process to start in... 12 hrs :)
Anirudh
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Re: Scratch build : #905 Mustang

Postby Sai1704 » Sun Sep 22, 2013 5:07 am

I've begun cutting out the parts. i started with the fuselage sides, and together they weigh 10 g! Are there any techniques to cut holes in order to lighten them?
Anirudh
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Re: Scratch build : #905 Mustang

Postby Sai1704 » Mon Sep 23, 2013 8:17 am

All parts cut and finished over the last two days.

Image
Image
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Image

I guess I'll start building tomorrow or the day after.
Anirudh
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Re: Scratch build : #905 Mustang

Postby Sai1704 » Mon Sep 30, 2013 8:07 am

Here are the finished tail surfaces...
Image
and the fuselage.
Image
Image
Image
i've begun with the wings,
Image
-waiting for the glue to dry.
Anirudh
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Re: Scratch build : #905 Mustang

Postby Wildpig » Mon Sep 30, 2013 8:45 am

3 rd picture. The side view of the fuselage. Do you have a former in the wrong position?
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Re: Scratch build : #905 Mustang

Postby Sai1704 » Tue Oct 01, 2013 7:31 am

Wildpig wrote:3 rd picture. The side view of the fuselage. Do you have a former in the wrong position?

If you mean the 3rd one on top (E), I believe I cut the notches too deep. No problem about the "off-scale" look, it'll add a nice touch :D
Anirudh
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Re: Scratch build : #905 Mustang

Postby Steve Blanchard » Tue Oct 01, 2013 9:49 am

Actually it looks like you may have the former in upside down. That definitely is not a notching issue. But if you are OK with it then that's all that matters.
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Re: Scratch build : #905 Mustang

Postby Steve Blanchard » Tue Oct 01, 2013 9:52 am

Actually looking at it again, it looks like you have it seated way too low not that it is upside down. This is gonna drive me nuts!
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Re: Scratch build : #905 Mustang

Postby Wildpig » Tue Oct 01, 2013 11:25 am

Good progress on your build.
I'll be curious to know the final weight in comparison to my Guillow Mustang.
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Re: Scratch build : #905 Mustang

Postby Sai1704 » Tue Oct 01, 2013 10:46 pm

Wildpig, as of now, frames weigh exactly 14 g. All other parts(canopy, thrust button, rubber motor, etc) weigh 8 g. Hoping to get it under 28 g.
Anirudh
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Re: Scratch build : #905 Mustang

Postby Sai1704 » Fri Oct 04, 2013 8:32 am

Completed wings with ample dihedral.
Image
Image
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