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Old Jul 24, 2012, 01:48 AM
Drusky is offline
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just a rumour
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What about bolting the mould to a frame afterwards? You would have to recess the bolt heads on side A. You could use angle iron. 50mmx50mmx4mm length = x. It could be bolted on so that it lies over the corner of the B sides.
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Old Jul 24, 2012, 04:24 AM
Sean Oelofse is offline
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.....till the wind drops.
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CHEESE Drusky!
We do want this thing to fly!! ;-)
Old Jul 24, 2012, 04:36 AM
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just a rumour
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Sean you prrrawn! You would think I was considering using the angle for a wing spar :P
Old Jul 24, 2012, 04:44 AM
Bakkie is offline
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I think I'm Mode 2
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Quote:
Originally Posted by Drusky View Post
Sean you prrrawn! You would think I was considering using the angle for a wing spar :P
that's what I though too



Who know what to expect from you...... I saw your post of turning the Le Fish into a Titanic

Old Jul 24, 2012, 01:07 PM
Drusky is offline
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just a rumour
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Le Nemere
Old Jul 28, 2012, 07:29 AM
johannlochner is offline
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Stirring the pot
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It's raining again!

I've run out of resin, and can't get anything locally!
Rather than wait a week,
I split the mould halves!

I'll do the final squaring off later as I think it'll be fine....

It split easily enough, but I had some negative draught on the vertical tail seam line.
The plug is rigid with no flex which caused the split edge to crack off.
It can be fixed!
Otherwise.....
I'm happy!
Old Jul 28, 2012, 12:03 PM
graham1234 is online now
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Graham Kirkland
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Not surprised you ran out of resin. That is a BIG mould. Must weigh a ton.

We are going to have fun making sure that you don't get any surface bubbles. There are some pretty sharp curves in that tool. Ah, I forgot, you have been down that road before.

Impressive finish. But I am getting used to that in your work.

Graham
RCG Plus Member
Old Jul 28, 2012, 02:31 PM
Drusky is offline
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just a rumour
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Why such a big mould? I was reading Samotage's Jart build again today and noticed that his mould was faaaar less chunky. Is the beef really necessary?
Old Jul 28, 2012, 02:36 PM
wyowindworks is offline
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Just fly it!
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Samotage wasn't pressurizing the inside of the mold with 50 pounds per square inch.
Old Jul 28, 2012, 02:43 PM
johannlochner is offline
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Stirring the pot
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Quote:
Originally Posted by Drusky View Post
Why such a big mould? I was reading Samotage's Jart build again today and noticed that his mould was faaaar less chunky. Is the beef really necessary?
Hi Andrew
Probably not....
The mould could have been thinned out width wise to follow the fuz shape, (especially the nose area) but making the "box" would prove a lot more work and accuracy.
Sam was also not using the inflation system where you need "thickness" to counter 60psi internal pressure and the necessary even clamping.
I simply come to terms with the quantity of resin!

But hey,
I'm learning too!
Old Jul 28, 2012, 02:51 PM
johannlochner is offline
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Stirring the pot
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Oops...
Thanks Adam!

I've only used 45psi so far....
The mould Graham number's using for his DLG pod has worked great so far.
That learning curve is pretty steep in it's self as regards lay-up.
I'll get there soon....
Hopefully, I can learn from his experience!
Last edited by johannlochner; Jul 28, 2012 at 02:52 PM. Reason: Step by step
Old Jul 29, 2012, 12:41 AM
Flying Beagle is offline
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...missing the PE Slope Rebels
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wonder if anyone has tried to mix some "filler" to reduce the amount of resin reqd, like micro balloons, only bigger

Maybe dried wasabi green peas
Old Jul 29, 2012, 01:32 AM
Zenmaniac is online now
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Building with TLAR precision
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Quote:
Originally Posted by Flying Beagle View Post
wonder if anyone has tried to mix some "filler" to reduce the amount of resin reqd, like micro balloons, only bigger
That's why all the kids' sandboxes near Johann's house are empty!

If you used that much straight epoxy, it'd be smoking for a month!

-= Dave
Old Jul 29, 2012, 03:03 AM
johannlochner is offline
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Stirring the pot
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Hehehe
We have a huge sand box just down the road!

I have,
been down there in the middle of the night in pouring rain!
and...
cooked it up on the stove to dry it!
Strange but true!


If you mess around with epoxies,
and you not careful.....
You will be punished!

I mixed up 5g of gel coat to fix the minor chips and blemishes.
It's a 10: 1 ratio ie 0.5g hardner
and....
My very sensitive scale sd it up!
It's still all sticky!

Now to clean it up....
Last edited by johannlochner; Jul 29, 2012 at 03:05 AM. Reason: J with sticky fingers
Old Jul 29, 2012, 03:09 AM
Thepasty is offline
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Fly fast, Dont crash.
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hey J

thats why I always mix more than I need when using such small amounts.

Not that I've done any glassing in the past year...


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