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Perry PC-3A1 — 2-man mini sub

This is the place to post your submarine build- ups.

Re: Perry PC-3A1 — 2-man mini sub

Postby Pirate » Sun Feb 17, 2013 10:13 pm

You can see where it needs to bend.

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These rabbit slots will make the panel thin enough in the exact spots I need it to bend.
Here you can see how it turned out. Nearly perfect.

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You can also see ins these photos that I cut up cardboard for a template for the vertical parting board for the first part of the mold.

Then I cut the panel for the vertical parting board.
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I backed up the vertical board with pieces I used on my Ohio mold, so I didn't have to cut new supports.

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Next step: start to lay up the gel coat for the mold.

I found that, what I call google eyes, from a craft store work very well as mold keys. The plastic they are made of Harley needs any wax or release agent to keep from sticking to the resin. And they stick down really easy with a touch of super glue.

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Here you can see the lay down of the gel coat I colored gray so I can see the white gel coat that goes in for a pull casting. You can see the little bumps from the keys all the way around too.

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Re: Perry PC-3A1 — 2-man mini sub

Postby JWLaRue » Sun Feb 17, 2013 10:23 pm

Pete,

Great postings and excellent progress.

Excellent work as usual!

-Jeff
Rohr 1.....Los!
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Re: Perry PC-3A1 — 2-man mini sub

Postby Pirate » Mon Feb 18, 2013 1:27 am

Thanks Jeff.
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Re: Perry PC-3A1 — 2-man mini sub

Postby Sub culture » Mon Feb 18, 2013 7:38 am

I've seen drawing pins used for registration points, that's a cheap method, and they're easy to reuse being metal.

For small moulds, one method I found works well is to mould the first piece against a flat board, when that's cured dremel in some small dimples at intervals around the piece, prep for moulding, and that gives you perfect registration marks.
'Why are you staring at an empty pond?'

Want to dive your boat in crystal clear water? Then you had better Dive-in- http://www.diveintomodelsubmarines.co.uk
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Re: Perry PC-3A1 — 2-man mini sub

Postby Pirate » Tue Feb 19, 2013 2:13 am

Laid up the fiberglass.
Removed the vertical parting board. Came off great.

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Got he gelcoat put down on the other side after cleaning up the clay, waxing the new side of the mold and spraying on the PVA release.

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Have to lay up the glass tomorrow night. Fortunately, this epoxy gel coat from Fibre Glast can set up overnight and doesn't require sanding before applying glass after this amount of time.
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Re: Perry PC-3A1 — 2-man mini sub

Postby Pirate » Sat Feb 23, 2013 12:37 am

Finished up grassing both sides. I glassed over some cardboard to create some stands so the mold will stand by itself when casting the part.
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After it cured I popped it out of the parting box. After cleaning up the clay it looks
Like it turned out really good.

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Re: Perry PC-3A1 — 2-man mini sub

Postby Pirate » Sat Feb 23, 2013 12:41 am

Now I'll make the top side mold the same way.

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Got the vertical parting board up with the clay and keys in place. Tomorrow I'll spray on the PVA release and then gel coat.
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Re: Perry PC-3A1 — 2-man mini sub

Postby Pirate » Tue Mar 12, 2013 12:47 am

Yay! Mold turned out great, so did the first casting.
This shows it right after coming out of the mold--not even cleaned up edges yet, and it registers great.

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