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Old Oct 01, 2012, 06:33 AM
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Fibreglassing Q's?

im going to fibreglass this flyfly model what weight glass should i use? i want something tough as ill be doing grass launches from the bungee also where can i buy the cloth and epoxy resin from?

cheers
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Old Oct 01, 2012, 06:44 AM
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Bias boating.
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Old Oct 01, 2012, 06:49 AM
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they only have one cloth i take it 6oz is correct weight? ill go there tomorrow
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Old Oct 01, 2012, 09:43 AM
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6oz per sq ??. Might be heavy, for sheeting 1/2 or 3/4 oz woven cloth would be mush lighter
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Old Oct 01, 2012, 01:49 PM
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Most of your hobby shops carry glass and resin. I would think 1/2 or 3/4oz would be enough.
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Old Oct 01, 2012, 02:46 PM
GPT
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Gaz

I haven't needed any for a long time but I found these guys the best for cloth quality and price.

https://www.petenplanes.com.au/fiber...ns/cat_22.html
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Old Oct 01, 2012, 05:24 PM
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If only looking protecting the foam you should use a very light balanced cloth.
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Old Oct 01, 2012, 05:29 PM
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I thought Bias would have some smaller stuff for minor repairs. Oh well.
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Old Oct 01, 2012, 06:13 PM
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OMG you used punctuation marks whats going on
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Old Oct 01, 2012, 08:53 PM
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thanks guys i will order some of that cloth and i found a web site from pldaniels about using a cabolts water based polyurethane instead of the epoxy i think ill give this a try done a search on google and found this one by wattyl http://www.wattyl.com.au/Estapol/Pages/home.aspx
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Old Oct 01, 2012, 10:50 PM
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my order just arrived from hobby king and i picked up some polyurethane im not sure if its the right one it is water based so i will give it a test also last week i chucked some fibreglass cloth in my hobby king basket that to arrived today but its not what i can use on this model it weighs 159g 1x.5m
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Old Oct 02, 2012, 09:30 AM
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Poly over glass works really well. Easy to apply, light and won't poison you. The drawback is it doesn't give a hard shell like epoxy. It does make a great paint base which I would recommend as some of the single pack water based poly from Cabots and Wattyl are interior finishes, so don't like the sun.
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Old Oct 02, 2012, 09:48 AM
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yeah your right twang its not like a hard shell but the fibreglass has gone pretty stiff i tested it on some scrap EPS foam i also went thru a few boxes of .... i have all rc gear and found two small bags of fibreglass from hobby king i ordered over a year ago the bags say 18grams but this stuff is so light and soft i wont be using it actually feels as weak as a tissue the other stuff i took a pic of is great stuff but feels heavy and doubling that weight once wet i dont think my model will fly so based on the 18g and 318g stuff i have here to feel i bought some 90g stuff from ebay
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Old Oct 02, 2012, 07:36 PM
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The cabots works well, its pretty much the same finish as the wattyl. I wouldn't waste money buying another can when you have the cabots already. Make sure you put the cloth on a 45 degree angle to the wing. This adds way more torsional strength. Being water based, you can do more than one coat of the cabots without adding much weight. It will fill the weave for a better finish. If you're keen you can even add some talc for a really smooth finnish.
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Old Oct 02, 2012, 07:39 PM
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Whatever cloth you use you must make sure its balanced, the same number of fibres in warp and weft of the weave. If you dont there is a good chance changes in heat will warp the model or flying surfaces.
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