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Old Nov 27, 2012, 10:04 PM
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United States, IL, Northbrook
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A-10 Warthog Balsa Design and Build: 1/11th Scale

I was originally going to build a Chis Golds A-10. But after starting to convert the plans to AutoCAD I realized it wasn't as scale as I would have liked.


This is my first balsa build, and I figured this would be a good size. I plan on eventually scaling the design up to meet IMAA requirements after ironing out any issued from this first pass.

Fowler flaps and decelerons will be worked into it too.

Here are some picture of the finalized solid model and the start of the balsa ribs, formers, etc. Loadout probably isnt realistic, but I got carried away
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Last edited by Dirty Dee; Jan 13, 2013 at 06:47 PM.
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Old Nov 29, 2012, 11:24 AM
EDF Jet Jam 2015, May 28-31st
eatond's Avatar
United States, MO, St Charles
Joined Nov 2002
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Hi Dirty Dee,
nice job so far. What source did you use for a 3 view?

Dan Eaton
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Old Nov 29, 2012, 08:38 PM
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Quote:
Originally Posted by eatond View Post
Hi Dirty Dee,
nice job so far. What source did you use for a 3 view?

Dan Eaton
I used the ones attached as well as from this site:

http://www.airwar.ru/other/draw2/a10a.html
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Old Dec 03, 2012, 10:17 PM
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Progress update pic.

Wing tips and nacelle intakes will be made from 3mm stacked depron. Tail cone is 6mm depron.

I was debating making the wing 1-piece removable. Now I'm thinking I will do a 2 piece, detachable before the inboard flaps.

I also decided to make basic ailerons for now and then design the decelerons after I get this airborne.
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Old Dec 07, 2012, 11:44 AM
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SDF
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I'd love to build one when you get the plans done. Good luck!
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Old Dec 08, 2012, 10:47 PM
Imagine That!
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Tularosa, New Mexico, United States
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Great CAD work!

-=Tom=-
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Old Dec 11, 2012, 07:32 PM
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SDF
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Is this for 70mm fans?
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Old Dec 12, 2012, 11:17 AM
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United States, IL, Northbrook
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Quote:
Originally Posted by FOShowNoClass View Post
Is this for 70mm fans?

That's the plan. But since the inside diameter of the nacelles are close to 120mm it will require a taper to the fans, which will look strange.

One option I was considering is just using 90mms, but that might be overkill.

What I was thinking is rather get a set of 120mm fan blades and place them ahead of the 70mm fan unit, and allow them to spin freely, similar to what is done for the larger turbine a-10s.
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Old Dec 20, 2012, 11:44 PM
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Nice plan you have going. I love the A10 and recently built a twin 50mm. I plan to build a larger one at some point. It sounds like if you go 90mm it would leave you 10mm thick walls on the nacelles, that would be a good material thickness for shaping the intake and the slight rear taper. I look forward to your build Greg
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Old Dec 21, 2012, 12:48 AM
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United States, IL, Northbrook
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thanks for the kind words.

For the nacelles, I might be sheeting the inside surface for the front and center section. For the rear where it curves I might do a mix of balsa and hot-wired foam since sheeting seems like it would be a pain.

I haven't gotten much progress to be worth posting new pictures since the past few weeks have been hectic. Been working on the nose section and gear bay. After Christmas I should be back in full swing with the design.
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Old Dec 23, 2012, 10:53 AM
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wow!
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Old Dec 24, 2012, 12:10 PM
ich bauen groß modell flugzeug
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awesome Subbed
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Old Dec 26, 2012, 09:59 PM
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subbed. you could always run bigger fans on less cells. for example, run them on 5S instead of 6S, or stick to 6S and run around at half throttle and get longer flight times.

I would not recommend putting larger fans in front that freewheel in the breeze. this will add all kinds of unwanted vortices into the driving fans and will severely diminish their performance. I would go with larger fans right from the get go and run them either way I suggested above. the 12 blade fans from Hobby King (or other sources) will be good for an A-10, since they look the part, sound the part and you don't need fighter-like performance. i think that's the way to go.

Rich
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Old Dec 27, 2012, 03:17 PM
IWC
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I ditto LuvEvolution.
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Old Dec 27, 2012, 04:52 PM
Firecracker!
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San Francisco & Santa Cruz
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Nice project, thanks for letting us see your CAD model as it develops!

Rich, could you just use a lower KV motor instead of running at low throttle all the time? It is my understanding that low throttle isn't a good idea done constantly.
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