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Old Apr 04, 2011, 04:54 AM
Use your imagination....
czirh's Avatar
Turkey, Izmir, Seferihisar
Joined Oct 2007
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Build Log
Short Skyvan SC-7

I started a new project, Skyvan...
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Old Apr 04, 2011, 05:14 AM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
13,256 Posts
There are a few Skyvan threads, (around 18), if it helps determine, solve, any problems.

Nice old workhorse.
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Old Apr 04, 2011, 07:04 AM
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czirh's Avatar
Turkey, Izmir, Seferihisar
Joined Oct 2007
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I started fuselage. 3mm balsa, plywood and pine..
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Old Apr 04, 2011, 02:17 PM
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Turkey, Izmir, Seferihisar
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I drew Corel.. Wingspan: 2m.
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Old Apr 05, 2011, 01:46 AM
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Turkey, Izmir, Seferihisar
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What airfoil should I use in this model?
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Old Apr 05, 2011, 12:36 PM
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Turkey, Izmir, Seferihisar
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Fuselage...
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Old Apr 05, 2011, 12:43 PM
The Hun in the Sun
vonJaerschky's Avatar
Canada, BC, Comox
Joined Nov 2003
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Quote:
Originally Posted by czirh View Post
What airfoil should I use in this model?
I don't know what the full size aircraft used. I would choose an airfoil that gave good lift at low speed, something like a NACA2415 which is semi-symmetical, or perhaps even a simple Clark-Y if you prefer a flat bottom airfoil. A Clark YM-15 is a bit thicker and might be a good choice, too.
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Old Apr 05, 2011, 05:23 PM
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Cologne, Germany
Joined Dec 1996
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I would simply use a Clark-Y profile. That's what was used on the nice design and free plans provided in the German magazine FMT back in 1998, when I built mine.

From you photos, it appears you will have detachable wings. With a 2-meter wing span this might be nice, but most versions (mine has a 1.5m span) have a one-piece wing where the upper fuselage hump deck—the fuel tank on the real plane—is part of a removable wing. This makes construction easier, and the general strength of the wing's mid-section is tougher.

My model uses simple Speed 400/7.2v direct-drive motors with 6x4 props and 7 x NiCd cells. Construction is all balsa and controls are aileron, elevator, rudder, and [brushed| motors. The ESC is a 35A Schulze. I have not flown the model in over 10 years—it simply hangs on display—and therefore have never tried a 2s LiPo pack, but I'm sure it would fly fine with one. The model is very light.
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Last edited by James Frolik; Apr 05, 2011 at 05:29 PM.
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Old Apr 05, 2011, 10:55 PM
CEL abuser
USA, CO, Denver
Joined Dec 2010
392 Posts
To really enhance the scale feel, make sure your model at least smells like Jet A. Bonus points for leaking it and vibrating badly as well.

Oh yeah make sure the tailgate is closed for takeoff!

It's a fun one to jump out of though
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Old Apr 06, 2011, 12:29 AM
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Turkey, Izmir, Seferihisar
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Thanks for all comments..
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Old Apr 06, 2011, 12:56 AM
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czirh's Avatar
Turkey, Izmir, Seferihisar
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Wing: 1.5mm balsa over foam and 40gr of glass fabric coating, then paint.

Fuselage : Balsa over 40gr of glass fabric, then paint.

Rudder, elevator: Balsa construction, the normal film coating, then paint.

1 - Any suggestions on the above process?

2 - 8 mini servos will be used. Is it OK to use normal ESC?

Thank you ...
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Old Apr 06, 2011, 09:05 AM
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czirh's Avatar
Turkey, Izmir, Seferihisar
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Quote:
Originally Posted by vonJaerschky View Post
I don't know what the full size aircraft used. I would choose an airfoil that gave good lift at low speed, something like a NACA2415 which is semi-symmetical, or perhaps even a simple Clark-Y if you prefer a flat bottom airfoil. A Clark YM-15 is a bit thicker and might be a good choice, too.
Yes, Clark-y good idea..
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Old Apr 06, 2011, 09:15 AM
The Hun in the Sun
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Canada, BC, Comox
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Quote:
Originally Posted by czirh View Post
8 mini servos will be used. Is it OK to use normal ESC?
Thank you ...
Probably not. 8 mini servos will be too much for most ESC's. You will need a seperate BEC, like this or this. Most ESC's have a what is called a linear voltage regulator, and 8 servos would overload them. Some ESC's (Like the Phoenix Ice Series) have a built in switching type regulator, and they can handle more servos.
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Old Apr 06, 2011, 09:20 AM
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czirh's Avatar
Turkey, Izmir, Seferihisar
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I started the construction of the nose. This is the difficult part for me. I use the lost foam method.
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Old Apr 06, 2011, 01:44 PM
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czirh's Avatar
Turkey, Izmir, Seferihisar
Joined Oct 2007
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Quote:
Originally Posted by vonJaerschky View Post
Probably not. 8 mini servos will be too much for most ESC's. You will need a seperate BEC, like this or this. Most ESC's have a what is called a linear voltage regulator, and 8 servos would overload them. Some ESC's (Like the Phoenix Ice Series) have a built in switching type regulator, and they can handle more servos.
Thank you for your reply. I have got this, but I think deficient...?
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