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Old Oct 20, 2012, 06:39 PM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
Joined Apr 2006
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yeah 15 to 20 hours for plugs.
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Old Oct 21, 2012, 03:11 PM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
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There you go Claus 100,000 views ...
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Old Oct 22, 2012, 05:44 PM
Claus at Area 52
clausxpf's Avatar
copenhagen Denmark
Joined May 2002
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ducts.

I am not into the the quality that you make Rodger. but I am getting closer.
it might be my epoxy that is to liquid.
But the vacuum bag method looks like it works ok.
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Old Oct 22, 2012, 06:32 PM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
Joined Apr 2006
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be sure to test them and make sure they wont collaps under the suction of the fan .i had all of the bulkheads to glue mine too and i added c/f tow to help too.
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Old Oct 24, 2012, 11:40 AM
Claus at Area 52
clausxpf's Avatar
copenhagen Denmark
Joined May 2002
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right side duckting "cooking"

That little pump really knows to do the job.
The epoxy I use will have to have 48 hours of curing time, to go from plastic to more solid state.
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Old Oct 24, 2012, 11:47 AM
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D_FAST's Avatar
Denver CO
Joined Apr 2008
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just curious but shouldn't there be a separator and some kind of cloth to soak up the excess resin?

I have been reading a lot about fiberglassing molds etc, read it somewhere. is there ny cons doing it without it.
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Old Oct 24, 2012, 01:08 PM
Claus at Area 52
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copenhagen Denmark
Joined May 2002
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I use a thin plastic bag cut into "tapes" 2-3" wide as separator , it is more flexible than tapes.
and the excess resin just stays in the bag, as the bag have some stars on the inside surface.
That leaves room for the excess resin.
Claus
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Old Oct 24, 2012, 10:31 PM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
Joined Apr 2006
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i use armalon and a layer of perferated tedlar,then a paper towel ,plus a beather cloth. for ducts they can be done with out a bag.the shape of these ducts needs pretty heavy cloth or a lot of C/F tow and glued to some bulkheads ,there is a lot of suction with a long duct and the oval shape want to collasp.
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Old Oct 24, 2012, 10:58 PM
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Rocketboy1030's Avatar
Canada, ON, Mississauga
Joined Nov 2011
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You guys need to put together a foamie kit! I am having trouble moulding Depron into round tubes for my EDF Nacelle on another build, can you tell me some tricks to end up with a perfectly round tube?
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Old Oct 25, 2012, 12:01 AM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
Joined Apr 2006
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i've never made a round tube ...but for shaping i use a hair dryer to heat the foam and a can to form it around. there is a grain to depron foam so it wants to bend one way easier than the other .bend it with the grain and it will be easier ,you might need a frame for the depron to be glued to to make a round nacelle.
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Old Oct 25, 2012, 09:08 AM
Claus at Area 52
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copenhagen Denmark
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A long time ago we had a thread on depron and how to do the impossible with it.

But back to the Draken II
just to illustrate how my vacuum bags handle the excess resin gets away.
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Old Oct 28, 2012, 07:03 PM
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unclecrash's Avatar
white lake michigan
Joined Oct 2004
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Hi Claus. Im wondering what you are using for Vacum bags and the fitting to the bag and pump line.
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Old Oct 29, 2012, 09:38 AM
Claus at Area 52
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copenhagen Denmark
Joined May 2002
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vacuum bags

the one I have used is from this company:
http://www.obhnordica.dk/Default.asp...ductID=PROD793
I seal it with my foil iron at 140 degree Celsius. as it comes as long roll only sealed at the edge.
where the vacuum tube gets in I use model wax (clay)around the tube and from edge to my welding of the bag. The opening is typical 2 " wide.
normal plastic bags can be used, but then you have to have some some thing that gives the air a chance to reach you suction tube. and they are a little more tricky to weld airtight.
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Old Oct 29, 2012, 02:36 PM
deltas are cool
AIR SALLY's Avatar
Tehachapi ,CA.
Joined Apr 2006
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composite vendors that have vacuum bagging supplies use a tacking thick sealer called chomate tape ,this can be used to seal the bags and the vacuum tube . Claus' way is cheaper.
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Old Oct 29, 2012, 03:15 PM
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unclecrash's Avatar
white lake michigan
Joined Oct 2004
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OK I see how you are doing it.
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