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Old Apr 02, 2012, 04:44 PM
Just Stab It In
Bangalow,Australia
Joined Aug 2008
1,335 Posts
Question
vaccine bagging infusion

Hi all,
Has anyone already tried resin infusion on a foam bagged wing?

I assume it should work the same.

Asto
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Old Apr 02, 2012, 05:14 PM
Just fly it!
wyowindworks's Avatar
Cody, WY
Joined Nov 2007
6,915 Posts
Infusion typically requires some type of flow media which is removed after cure. With a traditionally bagged wing the flow media would have to be on the outside. You would then have a peel-ply finish on your wing and a bunch of dent's from the flow media.
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Old Apr 02, 2012, 11:57 PM
Just Stab It In
Bangalow,Australia
Joined Aug 2008
1,335 Posts
Definite no go then.
Cheers mate I forgot a out the flow mesh.
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Old Apr 03, 2012, 05:45 PM
Deniable plausibility
Shedofdread's Avatar
Derbyshire, UK
Joined Aug 2008
2,321 Posts
Just thinking out aloud... Could you cut at series of spanwise grooves in the core to allow the vacuum ie make the core the flow medium? Obviously, the grooves would have to be narrow and shallow and the mylar / PVC / whatever would need to be stiff enough to bridge said grooves.

As I said, just a thought.
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Old Apr 03, 2012, 05:50 PM
Just fly it!
wyowindworks's Avatar
Cody, WY
Joined Nov 2007
6,915 Posts
Quote:
Originally Posted by Shedofdread View Post
Just thinking out aloud... Could you cut at series of spanwise grooves in the core to allow the vacuum ie make the core the flow medium? Obviously, the grooves would have to be narrow and shallow and the mylar / PVC / whatever would need to be stiff enough to bridge said grooves.

As I said, just a thought.
It is quite possible. That is how sandwich construction is often infused. The grooves are usually visible on the back peel-ply side. The mylar, as you stated, would have to be able bridge these without distortion. It's a good idea.

It would be fun to try....
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Old Apr 03, 2012, 08:28 PM
Composites guy
North OC, Ca.
Joined Jun 2005
1,187 Posts
Build a mold of the upper and lower wing skins. The mold is joined at the leading edge and open at the trailing edge( looks like a taco). Put dry glass or other reinforcement against the tool, envelope out to the mold then infuse resin from the perimeter.

Once the part cures, remove the bag, unbolt the leading edge and you should have a TACO skin in the airfoil shape. Now, open the taco skin and slide in a foam core with a touch of adhesive. Use a second light bagging until the adhesive sets.

This is how the front wing on formulat 1 cars is often made.

Working backwards....
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