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Old May 31, 2011, 07:36 AM
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The point of the silicon plug is to act as an inflation bladder ?

As i understand it ; you put the silicon plug into the mold , to press the layup to the mold wall ?
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Old Aug 11, 2011, 08:40 PM
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building season is here.
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subscribed, great info here.
Old Aug 17, 2011, 04:37 AM
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Hi, i am quite new to rc model building. Recently I joined a team of UAV makers where I am taking part it fuselage building. But unfortunately I know nothing about fiberglass oulding which will be required. Can anyone help me by leading me to resources where I can learn step by step with pictorial teaching? Thanks
Old Aug 17, 2011, 04:03 PM
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B-1 bob, step by step molding videos on you tube. You may have to search a while to find a video on one were he starts a plug, but when you do you will be glad you waited.

http://www.youtube.com/user/hornitpi.../3/gvRHa2lcve4

http://www.b1modelproject.com/
Old Dec 22, 2011, 12:21 PM
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I have a general question for all you fabricators out there:

I have a cowl that is a bit ugly and worn and I wanted a new one. I am beginning to take more of an interest in fabrication and was considering molding my existing cowl and making a new one Vs. buying one new/direct for $30

In regards to what kind of expectations I should have, what would one expect to spend on materials to mold and fabricate a new cowl? How much time should I expect to spend (considering it may take me several tries before I am satisfied)?


Yes, there is the immediate gratification of just buying the cowl direct and installing it; but I think this could be a nice learning experience for me to learn a few new building techniques.

The plane I have been referring to is a Precision Aerobatics Addiction-X that I affectionately refer to as "Burned Retina" 501 LEDs installed internally+ Solid white covering
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Old Dec 26, 2011, 12:14 AM
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It'll take about three times more materials than you expect, and about 10 times longer!

It depends on how much stuff you have lying around. Do you have any composite materials already? Things like wax, pva, cabosil etc cost peanuts per part as they last forever, but when you first get into it, they can easily cost many times the cowl...
Old Dec 27, 2011, 12:50 PM
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Thanks Odysis, I have nothing and am starting from scratch. What would you consider to be the items I need to have on my shopping list?

Thanks!
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Old Dec 27, 2011, 06:01 PM
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Plug: Something to carve from (foam/MDF), or the original cowl.
2 pack paint. I get mine from the local car paint joint. 1 pack doesn't release well, or at all...
Polish
Wax - silicone free. Get it from your composite store
PVA. Not the glue, the mould release. Again, composite store.

Mould: Surface coat. Either buy this, or make it. Adam has a great recipe, from memory resin, west 403 filler and carbon dust.
Carbon tow for the corners and to strengthen the mould
Light glass. I use 3/4oz, but you can get away with heavier. Enough for 1 layer
Heavy glass. 4oz, 6oz, something like that. Enough for about 10x more than the part will be

Part: Glass, resin. You should have them left over from the mould.

Other things you'll probably find useful: Microballoons, gloves, cabosil, gloves, patience, gloves. Have a read of Adam's excellent moulding threads. You don't need to worry about the recent inflation bladder work, but the general idea is always the same. You'll notice a pattern in everyone's threads - follow that and you can't go too far wrong!

Good luck - it's addictive
Old Dec 28, 2011, 03:01 PM
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Thanks Ody!
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Old Sep 19, 2013, 03:57 PM
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Anybody know of a good thread or resource for bladder molding? I have been doing a lot of reading over the past few days but have not come across the steps needed to make a mold for use with a bladder. I'm guessing that the initial process is similar, but then there has to be some sort of casting/resin to create a solid block on top of your typical fiberglass mold. Just a guess though, any information is appreciated as I'm new to mold making.
Old Sep 19, 2013, 05:04 PM
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Look up Wyoming Wind Works. Adam has a couple vidoes on vimeo that cover the process fairly well. Of I can get to my comouter later I will try to post a link.
Old Sep 19, 2013, 06:44 PM
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Found them... but looks like just a preview to a DVD 'how to'. I would totally get the DVD set if I could find it...
Old Sep 19, 2013, 09:08 PM
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Making an Inflation Bladder for Assisted Composite Part Fabrication (13 min 49 sec)
Old Sep 19, 2013, 09:34 PM
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Quote:
Originally Posted by vicovaludemero View Post
Anybody know of a good thread or resource for bladder molding? I have been doing a lot of reading over the past few days but have not come across the steps needed to make a mold for use with a bladder. I'm guessing that the initial process is similar, but then there has to be some sort of casting/resin to create a solid block on top of your typical fiberglass mold. Just a guess though, any information is appreciated as I'm new to mold making.

See this thread: https://www.rcgroups.com/forums/show....php?t=1514414

And this video:

Layup of The Wyoming Wind Works DLG Fuselage - Economy (11 min 1 sec)
Old Sep 20, 2013, 09:58 AM
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Thank you sir, you are the man! That is exactly what I was looking for...

Would you mind if I PMed you a few questions when the time comes? If I need to that is, as I am doing A LOT of research before I start buying anything up.


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