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Vacuum Bag Joining - 12/24/2002 12:31:57 PM   
I-NAV



Posts: 539
Joined: 1/11/2002
From: Mililani, HI, USA
Status: offline 		Small problem. I bought a vacuum bagging kit which came with an 18"wide bag. The problem is I have a 20" wide wing..
Is it posible to join the plastic sheets with clear tape and still get a good seal?

< Message edited by I-NAV -- Dec 24 2002 11:21AM >

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Mike
Oahu, Hawaii
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Vacuum Bag Joining - 12/24/2002 12:58:56 PM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		U-Nav:

Use the "Industrial grade" 50 gallon trash bags. Easy, simple, and cheap.

You can do a pair, while the twins gasp for air.

Bill.

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Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to I-NAV)
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Vacuum Bag Joining - 12/24/2002 7:04:12 PM   
AV8TOR


 

Posts: 427
Joined: 12/28/2001
From: Mount Vernon, OH, USA
Status: offline 		It would work better using a double-sided tape sealing the bag. Before buying a nice set up I have even used polypropylene film folded over (one less edge to seal) and I used standard latex caulking to seal the bag together. Just make sure that the nozzle location is not close to the caulking. It will get you by. No I use the bagging system from Aerospace Composites. Their bag clips really work nice.

(in reply to I-NAV)
       Post #: 3

Vacuum Bag Joining - 12/24/2002 7:27:30 PM   
I-NAV



Posts: 539
Joined: 1/11/2002
From: Mililani, HI, USA
Status: offline 		Yep,
I bought the Aerospace Composites system but didn't think about how wide the chord is on a delta wing.

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Mike
Oahu, Hawaii

(in reply to I-NAV)
       Post #: 4

Vacuum Bag Joining - 12/24/2002 7:27:52 PM   
Ollie


 

Posts: 958
Joined: 12/8/2001
From: Punta Gorda, FL
Status: offline 		Six mil polyethelene sheet is available in hardware stores and garden supply outlets as plastic mulch. It is inexpensive and easy to work with. Just cut a rectangle of the length bag you want with twice the width. You can use almost any caulking to seal around three sides after the work is loaded and the sheet folded into a bag. I like MorTite caulking strips as they are not messy to apply. It is a lot easier to load a bag that is completely open rather than a tube. You can use a printer's roller to apply pressure to the caulking strip between the sheet plastic edges to insure a good seal. Wrap the vacuum line in caulking strip where it passes into the bag. The corner of the fold is a good place to put extra caulk and the vacuum tubing.

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Regards, Ollie

(in reply to I-NAV)
       Post #: 5

Vacuum Bag Joining - 12/24/2002 8:44:08 PM   
I-NAV



Posts: 539
Joined: 1/11/2002
From: Mililani, HI, USA
Status: offline 		Thanks all. Good info

Merry Christmas

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Mike
Oahu, Hawaii

(in reply to I-NAV)
       Post #: 6

Vacuum Bag Joining - 12/25/2002 10:00:35 AM   
winship


 

Posts: 151
Joined: 3/18/2002
From: Plainfield, IN, USA
Status: offline 		One extra tip. Make one end of the bag a little longer than needed and when finished bagging just cut that end off leaving the rest intact. That way you can reuse the bag and only have to seal the end you cut off.

Winship

(in reply to I-NAV)
       Post #: 7

Vacuum Bag Joining - 12/25/2002 10:36:44 PM   
Flypaper 2



Posts: 4359
Joined: 3/29/2002
From: Kingston, ON, CANADA
Status: offline 		To seal the bag, I use one of those plastic seal sets I use to put on windows for winterizing. It's a plastic channel in a channel and the plastic film goes in between. also reusable. Absolutely airtight It better be up here!

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Gord
Dreamed I was a muffler. Woke up exhausted.

(in reply to I-NAV)
       Post #: 8

Vacuum Bag Joining - 1/4/2003 12:28:19 PM   
ace2002


 

Posts: 73
Joined: 1/4/2003
From: petaluma, CA,
Status: offline 		I work with composites for a living, 20 years now, vacuum bagging is simple, thick clear plastic will let you see work, and good duct tape for the edges, a good vacuum fitting and pump with a regulator will work well.
Mike

(in reply to I-NAV)
       Post #: 9

Vacuum Bag Joining - 1/4/2003 12:54:14 PM   
I-NAV



Posts: 539
Joined: 1/11/2002
From: Mililani, HI, USA
Status: offline 		Thanks all,
Ended up using a heavy duty trash bag. Sealed the ends with the plastic clips and a bead of caulk. One lesson learned is to cut servo wells after sheeting. Made quite a depression in the sheeting over the cavity :

_____________________________

Mike
Oahu, Hawaii

(in reply to I-NAV)
       Post #: 10

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