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Sep 26, 2007, 01:30 AM
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ultralajt's Avatar
Build Log

ULTRON, my first 3D depron model


here I will show my new toy from first drawing to the first flights.

I hope you will enjoy !

About ten days ago, I start to thinking about making for myself a depron model.
I browse trough plans on web and no design meet all my criteria.
I want full-fuse, airfoiled 3d model, and cute at same time.

So I take pencil and a paper to make some sketches of my future design. I start with straight lines, but soon I discover, that kind of "bionic" lines looks pretty, so I stick with curved lines on the model.

I draw the same outlines in CAD and solve the internal structure.
When I was pleased with design, I made templates for all depron parts.

I use 3 mm depron for all parts, except ailerons and ruder as they are from 6 mm thick depron for stiffnes.

Bellow you can see the initial drawing of the model, and pictures taken during the assembly of model.

EDITED at 16.jan.2008:


Last edited by ultralajt; Jan 16, 2008 at 09:32 AM.
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Sep 26, 2007, 03:55 AM
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ultralajt's Avatar
And now to the flying!

I must tell, that I have no previous experiences flying 3D depron models, so it will be interested to watch my progress in trying to learn 3D.

Here are some pictures of first flights:
Last edited by ultralajt; Sep 26, 2007 at 05:32 AM.
Sep 26, 2007, 03:55 AM
My plans are in my blog
Rusty-Gunn's Avatar
Sep 26, 2007, 04:30 AM
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ultralajt's Avatar
And now some videos!

Remember, I am just a rockie in 3D flying, so dont judge me hard!

First video:
3D aerobatic depron model (1 min 35 sec)

Second (and I believe much better) video:
Ultron 3D model (5 min 56 sec)

Last edited by ultralajt; Sep 26, 2007 at 05:47 AM.
Sep 26, 2007, 05:57 AM
-+- PhlatBoyz -+-
kram242's Avatar
Very Nice!! Great job!
Sep 26, 2007, 06:30 AM
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ultralajt's Avatar
Thnx, Rusty and Mark!

And some technical stuff:
Wing span: 96 cm (37,8")
Lenght: 87 cm (34,25")

Materials: depron 3 mm, depron 6 mm,
plywood 3mm, plywood 1 mm, GFK 0,2 mm, carbon strips...

Motor: ROXXY 2827-34
Controller: Simprop MagicSpeed 18
Prop: APC 9 x 4,7 (now I see that I can use larger prop...let say...10/4.75 or even 11/4,75)
Accu: Flight Power EVO 20 800 mAh 3s1p

Mass ready to fly: 370 g (13 oz) (mostly thanks to generous covering with color self adhesive tape)
Last edited by ultralajt; Sep 26, 2007 at 06:37 AM.
Sep 26, 2007, 09:33 AM
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Wow! very nice.
If that was a kit, I would buy one of those.

Looking forward to more planes from you.
Sep 26, 2007, 10:24 AM
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DanT's Avatar
When I first started to read the build,,, I thought I would weigh a lot more when done with all that tape. Looks good.
Sep 26, 2007, 02:00 PM
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Is there no end to your talents first the outstanding Guppy, and
now your first foamy.

It looks and flies fantastically.

Keep up the good work.

Sep 26, 2007, 02:39 PM
glider pilot in training
webdragon's Avatar
Thats beautiful man,

But where are the plans?
Sep 27, 2007, 06:50 AM
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ultralajt's Avatar
Originally Posted by webdragon
Thats beautiful man,
But where are the plans?
They are not prepared for publishing yet.
Must correct or modify some minor details...
You need also an assembly manual and so on...

"Plans" looks like that at the moment:
Last edited by ultralajt; Sep 27, 2007 at 06:59 AM.
Sep 27, 2007, 07:18 AM
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martseger63's Avatar
Also anxious for the plans, really like the design (Y)
Oct 02, 2007, 09:30 AM
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ultralajt's Avatar
I have great time flying this model!

I also start to prepare the plans and assembly manual for publishing in TIM magazine.
Last edited by ultralajt; Oct 02, 2007 at 10:05 AM.
Oct 02, 2007, 11:04 AM
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DanT's Avatar
I like where!! Your flying more!
Oct 02, 2007, 06:17 PM
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cobra command's Avatar
Sweet work man, kudos!

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