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Git 'R Dun - Giant Scale! From the box to the runway. Whatever it is, show us how you build 'em! (build threads only)

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Old 05-08-2008, 07:47 AM   #37 (permalink)
Rod
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Default Re: Sukhoi 29KS

Thanks for the encouragement guys.
Got the UC recesses done and also the cowl recess.
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File Type: jpg UC recess.jpg (94.6 KB, 29 views)
File Type: jpg Cowl recess.jpg (111.2 KB, 30 views)
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Old 05-08-2008, 07:56 PM   #38 (permalink)
Rod
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Default Re: Sukhoi 29KS

I like to add some PU glue to my lightweight filler. This gives a nicer consistency and helps it stick to the foam. Am also gluing on the last bit of foam.
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File Type: jpg filler mix.jpg (135.3 KB, 45 views)
File Type: jpg filler.jpg (97.5 KB, 54 views)
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Old 05-10-2008, 12:01 AM   #39 (permalink)
Rod
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Default Re: Sukhoi 29KS

Got the carb air intake done, this is the last part to make. Will give it a final sand tomorrow and start glassing next week. I will give it two layers of 200gm glass for a nice solid surface.
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File Type: jpg carb intake 1.jpg (70.8 KB, 37 views)
File Type: jpg carb intake 2.jpg (85.7 KB, 26 views)
File Type: jpg carb intake 3.jpg (58.0 KB, 47 views)

Last edited by Rod; 05-10-2008 at 05:34 PM.
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Old 05-10-2008, 03:18 AM   #40 (permalink)
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Default Re: Sukhoi 29KS

Looks awesome. Man, you must love Sukhois to devote this much time. It must be awesome to have a plug for backups though!
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Old 05-10-2008, 09:42 AM   #41 (permalink)
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Default Re: Sukhoi 29KS

This thread is awesome
Please keep it updated!

It's so interesting to see how a scratch built Glass plane is made!

Thanks so much for sharing!
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Old 05-12-2008, 11:42 PM   #42 (permalink)
Rod
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Default Re: Sukhoi 29KS

Last bit of filling before glassing. I have sandwiched a piece of Mylar between the fuselage and pipe cover and filled on both sides.
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Old 05-12-2008, 11:51 PM   #43 (permalink)
Rod
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Default Re: Sukhoi 29KS

First layer of glass on the cowl. I put the second layer on straight away. I will cut the glass right next to the masking tape when the resin is green (just gone off). I will chamfer the cut so the glass on the other side has a clean join. The idea is to get nice clean glass layups to minimise sanding into fibreglass. I only want to sand filler and undercoat. I have previously used only 1 layer of 200gm (6oz) glass but it hasnt really been a firm enough surface.
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File Type: jpg Cowl first layer of glass.jpg (130.5 KB, 44 views)
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Old 05-12-2008, 11:57 PM   #44 (permalink)
Rod
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Default Re: Sukhoi 29KS

Here is the canopy with 2 layers of glass each applied in one piece with no relief cuts. I will take a mold off the canopy so I can make a fibreglass base for the canopy. Then I will add more foam front back and underneath and add 3 more layers of glass for vac forming the clear canopy. You need heaps of glass on a vacuum forming tool or it will get crushed by the vacuum. I know this from experience.
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Old 05-13-2008, 12:29 AM   #45 (permalink)
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Default Re: Sukhoi 29KS

Here is another drawing of the 29 showing the DA85 installed. Unfortunately the plug will protrude through the cowl. I will try cutting the plug down and making a custom plug cap for it. Anyone got any ideas?
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File Type: pdf SU 29 DA85.pdf (10.9 KB, 82 views)
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Old 05-13-2008, 01:54 AM   #46 (permalink)
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Default Re: Sukhoi 29KS

Hi Rod, Yes I see what you mean about the plug and you already have it inverted. How would it sit if you draw it with the necessary side thrust and mount cyl to the right with the motor offset to the left, even cheating a few mms if necessary. This would then present your manifold on the bottom which could make things easier when fitting the pipe/muffler ????
Just a thought, Cheers, B.
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Old 05-13-2008, 03:19 AM   #47 (permalink)
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Default Re: Sukhoi 29KS

Hi Barrie
the drawing is only indicative. I would certainly rotate the motor to suit my header. Mind you I will bend up my own header to suit. Also I will be rubber mounting the motor/pipe. Anyway I don't see any real problem altering the plug setup.
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Old 05-13-2008, 05:15 AM   #48 (permalink)
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Default Re: Sukhoi 29KS

The airfoil in the drawing is Eppler 168 with a thickened trailing edge. Probably 12% at the root and 10% at the tip.
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