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Search: Posts Made By: TeamSeacats
Showing results 1 to 25 of 174
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Forum: Composites Fabrication And Repair
02-25-2009, 12:41 PM
Replies: 4
Views: 1,182
Posted By TeamSeacats

RE: Mold Release

wax and then PVA (Polyvinyl Alcohol) - this is the brush (or spray) on liquid that dries into a water soluble (but not polyester) film. Epoxy resin's will work with it but they do attach more...
Forum: Composites Fabrication And Repair
12-21-2008, 07:47 PM
Replies: 11
Views: 2,781
Posted By TeamSeacats

RE: How to fuse two halfs together

I haven't photographed that process. I trim the half with the inset lip so that the lip is about 3/16 to 1/2" tall. I then place that half back in the mold it was made from. I have a series of...
Forum: Composites Fabrication And Repair
12-21-2008, 04:54 AM
Replies: 33
Views: 18,094
Posted By TeamSeacats

RE: epoxy or polyester resin

fazeel,

There are a lot of internet resources for what you are looking for - try wikipedia for starters.
Forum: Composites Fabrication And Repair
12-19-2008, 04:51 PM
Replies: 5
Views: 996
Posted By TeamSeacats

RE: Wanted Excellent Painter

Oooooo...that's hot. I'm going to keep that in mind for the next carbon boat I build!
Forum: Composites Fabrication And Repair
12-19-2008, 04:39 PM
Replies: 13
Views: 1,914
Posted By TeamSeacats

RE: How many layers of glass do I need?

agreed - chopped mat feels stronger because it has a lot more resin in it due to the random orientation / overlap of the fibers...there's a lot of space in there and it's actually stiffer due to the...
Forum: Composites Fabrication And Repair
12-19-2008, 04:35 PM
Replies: 33
Views: 18,094
Posted By TeamSeacats

RE: epoxy or polyester resin

Is there an echo in here?
Forum: Composites Fabrication And Repair
12-19-2008, 04:34 PM
Replies: 11
Views: 1,602
Posted By TeamSeacats

RE: corematt or paper towel??

These hulls were definitely vacuum bagged but it's amazing how resilient and dent resistant they are. Mine is 8 years old, has sailed quite a bit, and looks terrific. It is astonishing how light...
Forum: Composites Fabrication And Repair
12-08-2008, 12:38 PM
Replies: 97
Views: 9,140
Posted By TeamSeacats

RE: Best possible route to rebuild this fuselage section on Arrow

As you have found, milled fibers do not make the best filler material for fairing a surface. A thick mixture using milled glass fibers tends to be "clumpy" - full of "globs". Phenolic...
Forum: Composites Fabrication And Repair
12-08-2008, 11:30 AM
Replies: 11
Views: 2,781
Posted By TeamSeacats

RE: How to fuse two halfs together

Joggle it.

http://www.teamseacats.com/index.php?s=joggle
Forum: Composites Fabrication And Repair
12-08-2008, 11:25 AM
Replies: 36
Views: 5,650
Posted By TeamSeacats

RE: Epoxy VS, Polyester, this will leave a mark.

I have experience using both and can tell you unequivocally that from a performance/material standpoint epoxy is a superior product in nearly every way than polyester. The only advantage that...
Forum: Composites Fabrication And Repair
12-08-2008, 11:19 AM
Replies: 11
Views: 1,602
Posted By TeamSeacats

RE: corematt or paper towel??

I do boats as well - When I'm building light, I do not want a core material that will soak up resin since the resin adds so much to the weight. I race (people carrying) catamaran sailboats and I have...
Forum: Composites Fabrication And Repair
11-26-2008, 02:28 PM
Replies: 23
Views: 4,419
Posted By TeamSeacats

RE: Plug/Parting board

Any grocery store has it. I've used it for quick temporary mold making...it works OK.
Forum: Composites Fabrication And Repair
10-14-2008, 01:53 PM
Replies: 22
Views: 5,394
Posted By TeamSeacats

RE: Fiberglass sheet

It's scientifically proven that Epoxy adheres better to cured polyester than polyester adheres to cured polyester. It's physical properties are just about twice that of polyester so if it needs to...
Forum: Composites Fabrication And Repair
10-02-2008, 01:42 PM
Replies: 5
Views: 1,496
Posted By TeamSeacats

RE: What happened here - Delamination

Fiberglass doesn't like tight corners. Go to a lighter weight glass or find a way to hold it in place while it cures. Otherwise it will lift away from the bend leaving either an air void or a...
Forum: Composites Fabrication And Repair
09-26-2008, 10:12 AM
Replies: 21
Views: 3,446
Posted By TeamSeacats

RE: Fuselage without Formers/Bulkheads

In my latest sailboat hulls (constructed of one layer of .5oz glass and one of 5.7oz carbon), I glass in a piece of small triangle stock balsa in the flatish bow section to get the needed stiffness...
Forum: Composites Fabrication And Repair
09-10-2008, 09:44 AM
Replies: 11
Views: 2,198
Posted By TeamSeacats

RE: How can i fix and reinforce aircraft redome.

Wow, that thing is large! The delamination is the weakness so you need to figure out someway to reattach the core to the skins. Adding additional material to the inside will help but without...
Forum: Composites Fabrication And Repair
09-08-2008, 09:51 PM
Replies: 11
Views: 2,198
Posted By TeamSeacats

RE: How can i fix and reinforce aircraft redome.

If you like the way the exterior is, why would you worry about a few soft spots (or is it THAT soft?).

Honeycomb cores, once damaged, are very difficult to fix if a lightweight usable repair is...
Forum: Composites Fabrication And Repair
09-05-2008, 11:44 AM
Replies: 24
Views: 18,202
Posted By TeamSeacats

RE: vacuum pump from Harbor Freight

Improv not my thing? - don't be so quick to jump to conclusions - that was pretty insulting. I just don't agree with going to the trouble of gutting a fridge and using a pump that (while intended to...
Forum: Composites Fabrication And Repair
08-30-2008, 09:16 AM
Replies: 24
Views: 18,202
Posted By TeamSeacats

RE: vacuum pump from Harbor Freight

yes, that pump will probably work well from harbor freight. Refrigerator pumps will work ok - but why not use something as it was intended? That price on that pump from Harbor Freight is pretty...
Forum: Composites Fabrication And Repair
08-12-2008, 03:47 PM
Replies: 4
Views: 1,230
Posted By TeamSeacats

RE: Are autoclaves and vacuum bags necessary?

fun link:

http://www.hallspars.com/Categories.aspx?Category=51405b46-406b-4643-affc-352cd8272c85
Forum: Composites Fabrication And Repair
08-12-2008, 03:43 PM
Replies: 4
Views: 1,230
Posted By TeamSeacats

RE: Are autoclaves and vacuum bags necessary?

In addition to what has already been stated here, the autoclave not only elevates the temperature but most also pressurize internally to further increase the compression on the part increasing the...
Forum: Composites Fabrication And Repair
08-01-2008, 03:17 PM
Replies: 3
Views: 2,800
Posted By TeamSeacats

RE: Carbon fiber over fiberglass wing tube?

Yes, it is significantly stiffer...however, note that you may trade additional stiffness for a more brittle structure if not built strongly enough.



I'm a boat guy so I haven't a clue! ;-)...
Forum: Composites Fabrication And Repair
07-25-2008, 07:21 AM
Replies: 24
Views: 12,117
Posted By TeamSeacats

RE: How does carbon fiber veil and dope add strength to balsa?

That gets complicated quickly as the loads start affecting each other throughout the structure. It's been about 15 years since I had any exposure to it and not only have my calculus skills rotted,...
Forum: Composites Fabrication And Repair
07-24-2008, 12:03 PM
Replies: 24
Views: 12,117
Posted By TeamSeacats

RE: How does carbon fiber veil and dope add strength to balsa?

Composite structures take advantage of the skin on the outside to transmit and carry the tension loads...pretty close to your egg shell analogy. I've drawn the following diagram to show a simple...
Forum: Composites Fabrication And Repair
07-23-2008, 08:12 AM
Replies: 10
Views: 1,654
Posted By TeamSeacats

RE: What would you do with crack?

Ed,

That crack is a little bigger.

Jake
Showing results 1 to 25 of 174
 
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