GT23

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Fuzz
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Re: GT23

Post by Fuzz »

drbobopp@gmail.com wrote: Sun Apr 09, 2023 11:35 am The "fumed silica" mentioned......Is that the same as the 'cabosil/silica' offered here by boatbuildercentral?
Yes it is.

Fuzz
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Re: GT23

Post by Fuzz »

viewtopic.php?t=64990
I hope this helps with posting pictures. Pictures are really needed to get good help.

TomW1
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Re: GT23

Post by TomW1 »

drbobopp@gmail.com wrote: Sun Apr 09, 2023 11:35 am The "fumed silica" mentioned......Is that the same as the 'cabosil/silica' offered here by boatbuildercentral?
drbobopp@gmail.com if this is your e-mail address you might want to change it. To many junk mail addicts are out there, though Jaysen's latest fix is a help
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses. LT US Navy 1970-1978

drbobopp@gmail.com
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Re: GT23

Post by drbobopp@gmail.com »

Can someone recommend a specific vacuum pump for use on these builds? I've never used that technique before. There seem to be a LOT of pumps available, with wide price ranges. Please help with a suggested model....

fallguy1000
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Re: GT23

Post by fallguy1000 »

Need to know how big the bag will be...

You also need continuous run.

https://www.veneersupplies.com/categori ... ess__Kits/
My boat build is here -------->

viewtopic.php?f=12&t=62495

drbobopp@gmail.com
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Re: GT23

Post by drbobopp@gmail.com »

Lets' say 4x8 is the size.....The transom of the GT-23 is about 4x8. (And that will be four 12mm sheets, about 2 inches thick)...I will also be vacuum bagging 4x8 sheets of foam, sandwiching each sheet with fiberglass, for use in the cabin sides and top. ...

Thanks for link to specific pumps...which one do you think I should go for?

fallguy1000
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Re: GT23

Post by fallguy1000 »

Excel 5 or a used Welch lab pump
My boat build is here -------->

viewtopic.php?f=12&t=62495

drbobopp@gmail.com
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Re: GT23

Post by drbobopp@gmail.com »

OK, thanks...I just ordered the Excel 5 and a 4x8 vacuum bag.....Sound right?

I'll have more questions.. THANKS for responding!

fallguy1000
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Re: GT23

Post by fallguy1000 »

I use 50" wide vacuum plastic on a roll.

I built a 49" vac table with mdf. It was 34' long, is cut in half now.
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viewtopic.php?f=12&t=62495

drbobopp@gmail.com
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Re: GT23

Post by drbobopp@gmail.com »

Still trying to understand vacuum bagging. I've got my jig built, side and bottom panels cut and glued together, transom & bow transom parts cut. Ordered the pump fallguy recommended. and a 4x8 vaccum bag....
Next step: assemble the transom, meaning gluing 5 sheets of plywood (cut to plan) together using vacuum bagging.

So, are all of these layers--not just the vacuum bag, but the 'breather material', 'perforated film', and 'release fabric'-- necessary?

https://www.epoxyworks.com/index.php/va ... ng-basics/

One cannot just put the epoxy/silica-wetted pieces in the vacuum bag, line them up, and turn on the vacuum pump?

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