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Old Dec 22, 2011, 08:00 AM
Whisper Model Aircraft
heliwill10's Avatar
Greensburg, PA
Joined Feb 2008
566 Posts
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How much Vacuum?

How much vacuum are you pulling on your wings? For high load 60 and the standard Dow blue wallmate foam.
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Old Dec 22, 2011, 11:48 AM
Red Merle ALES
Curtis Suter's Avatar
United States, Mt, Helena
Joined Apr 2002
5,792 Posts
I don't know what wallmate is but here's some suggestions:

White bead foam about 5-6" in hg
Dow square edge (blue) foam from the large box store about 15" in hg
Dow Hi-load 60psi foam 20" in hg

This doesn't mean that you can't build a nice wing using less pressure either.

Hope this helps

Curtis
Montana
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Old Dec 22, 2011, 02:50 PM
Whisper Model Aircraft
heliwill10's Avatar
Greensburg, PA
Joined Feb 2008
566 Posts
That's does help I am a little high. I'm finding in some of my wings depressions that really I can only narrow down to foam.

I think wall mate is the same as the blue square foam.

Do you have any issues with the leading edge pulling down evenly at 15in? .014 mylar?

Will
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Old Dec 22, 2011, 06:16 PM
Just fly it!
wyowindworks's Avatar
Cody, WY
Joined Nov 2007
6,915 Posts
Quote:
Originally Posted by heliwill10 View Post
That's does help I am a little high. I'm finding in some of my wings depressions that really I can only narrow down to foam.

I think wall mate is the same as the blue square foam.

Do you have any issues with the leading edge pulling down evenly at 15in? .014 mylar?

Will
.014 mylar will conform to the LE at 15" Hg. I typically thin the LE portion of the mylar with a properly sharped cabinate scraper.
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