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by opie
Wed Mar 14, 2018 3:11 am
Forum: Gear Builders
Topic: filling bolt holes?
Replies: 15
Views: 4929

Re: filling bolt holes?

The board held up for ten to 15 sessions, including bending the mast. I just couldn't balance on it. It was ok with no chop but I bought a Takuma and like it much better. The one I did with the pour foam is just hanging out as a backup now. The Takuma is like standing on a small dock.
by opie
Sat Mar 10, 2018 4:50 pm
Forum: Hydrofoil
Topic: Another DIY foil
Replies: 64
Views: 15423

Re: Another DIY foil

Seems like the right thread to show my PLA mold attempt. This stab may be the first usable thing I've built. :) I designed the mold in Fusion 360, sprayed it with sandable primer ( not sure if this was necessary) , waxed it, filled the mold and squeezed the mold together. Next time I think I'll buil...
by opie
Fri Mar 09, 2018 11:59 pm
Forum: Gear Builders
Topic: Foam cored wings (another way)
Replies: 11
Views: 4122

Re: Foam cored wings (another way)

Nice write up and impressive results.
by opie
Thu Mar 08, 2018 4:42 am
Forum: Gear Builders
Topic: How thick can I lay carbon fiber?
Replies: 47
Views: 17421

Re: How thick can I lay carbon fiber?

Fiberglast 2000.

I guess I'll just spend a day doing the mast a few layers at a time. Didn't know I was risking a fire. :o
by opie
Thu Mar 08, 2018 2:32 am
Forum: Gear Builders
Topic: How thick can I lay carbon fiber?
Replies: 47
Views: 17421

Re: How thick can I lay carbon fiber?

While waiting on supplies I gave Dirk's "dirty mold" another shot. I was very proud of the way the first half went but when I started the second side I failed to wax the parting edge enough. New plan is to just add more layers, leave the plug in there, attach it to my ugly mast and see if it flies. ...
by opie
Sun Mar 04, 2018 2:14 am
Forum: Gear Builders
Topic: How thick can I lay carbon fiber?
Replies: 47
Views: 17421

Re: How thick can I lay carbon fiber?

Whow, That is so advanced layup :) I would not attempt such a thing with no prev experience. But thats me. since RC was mentioned, our application is more similar to ski and snowboard building. The closed cell or pu core can drink water :) , same with wood. Think the OP needs to look at other build...
by opie
Sat Mar 03, 2018 6:44 am
Forum: Gear Builders
Topic: How thick can I lay carbon fiber?
Replies: 47
Views: 17421

Re: How thick can I lay carbon fiber?

For gluing up there is a method of building a lip or ledge a few mm thick which slips inside the other half increasing the gluing surface for a stronger bond. I'll see if I can find a name for the process. It is very simple to do but difcukt to describe. Like the middle connection on a plastic East...
by opie
Fri Mar 02, 2018 7:27 pm
Forum: Gear Builders
Topic: How thick can I lay carbon fiber?
Replies: 47
Views: 17421

Re: How thick can I lay carbon fiber?

The other question you need to ask is how many layers can you lay up before the initial layer starts to gel off? The limitation may not be heat. It may be the fact that you will end up with a resin rich, heavy part due to pre vac curing. The only way I can use vacuum is to do each half separate and...
by opie
Fri Mar 02, 2018 6:24 pm
Forum: Gear Builders
Topic: How thick can I lay carbon fiber?
Replies: 47
Views: 17421

Re: How thick can I lay carbon fiber?

The other question you need to ask is how many layers can you lay up before the initial layer starts to gel off? The limitation may not be heat. It may be the fact that you will end up with a resin rich, heavy part due to pre vac curing. The only way I can use vacuum is to do each half separate and...
by opie
Tue Feb 27, 2018 6:48 am
Forum: Gear Builders
Topic: How thick can I lay carbon fiber?
Replies: 47
Views: 17421

Re: How thick can I lay carbon fiber?

rynhardt wrote:
Mon Feb 26, 2018 8:24 pm

My approach was to pour the foam in exactly the same mould and then sand approx 1mm off. You don't need to be super precise if you can flood the mould with epoxy to fill in the missing half mm here or there.

That's a good idea. I am going to try that. Thanks. :)

P.S. Cool video.

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