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Old May 21, 2012, 01:36 AM
Fubar 123 is offline
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Shiney !
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Old May 21, 2012, 06:40 AM
Vic101 is online now
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sand it - round?
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Very nice work again!!

Btw, I have been using 40 micron blown stretch film from dean @ barrierfilm.co.za for my bladders. (They may give you a sample or else pm me your address and I'll send you some, it sticks to itself but not permanently so it can be folded up and unfolded again.) Industry uses it to wrap pallets of bricks etc. so it is fairly widely used.


Using that plus switching to baking paper instead of wax paper as per Adam's tutorial on making the bladders made a huge difference. No leaks plus a huge expansion rate

Works way better than black bin bags....


Vic
Old May 21, 2012, 06:44 AM
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sand it - round?
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The product code is FIF-450-040-400-STR-STD
450mm wide, 40 micron stretch film.
Old May 21, 2012, 06:54 AM
johannlochner is offline
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Stirring the pot
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Quote:
Originally Posted by Vic101 View Post
The product code is FIF-450-040-400-STR-STD
450mm wide, 40 micron stretch film.
Thanks Vic!

I'll try to get some from Maizies.....
What's the difference between wax and baking paper?
Never mind, I'll ask my wife!

I never knew you were into the bladder thingy!
It's my 1st....
Thanks for the help!
J
Old May 21, 2012, 07:38 AM
Vic101 is online now
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sand it - round?
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Heh Heh - wax paper is a wimp version of baking paper
(for some bizzare reason the Pick'nNick store these two products in opposite ends of the store)
I detest doing seams by hand, the long stick or wire with wheels that snag the layup etc still gives me gaps every so often

But with the bladder...

I've not graduated to the full sand backing of my moulds yet, the 5mm glass layer has worked ok so far. You have gone first class with yours!!

Enjoying the tutorial
Last edited by Vic101; May 21, 2012 at 07:43 AM. Reason: clicked post instead of adding smileys...
Old May 21, 2012, 11:21 AM
johannlochner is offline
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Stirring the pot
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Quote:
Originally Posted by Zenmaniac View Post
Nice, Johann! I don't know... are the strings just to hold the bladder in place til you the 'sandwich' is made? Did you leave the strings in the whole time? Can you post a link to the DLG thread?

-= Dave
Yeah
The threads are cut once the mould halves have been positioned together. (Before clamping tight) and pulled thru leaving the seams in place! It's more about preventing the seams folding over and getting pinched!

Here is Jonas's vid:
Almost beats Dudley's famous sanding tutorial!

But, visuals really help understanding!

Thread: https://www.rcgroups.com/forums/show....php?t=1215235
Video on page 14:
How to lay up a DLG fuselage Part 2/3 (6 min 36 sec)
Last edited by johannlochner; May 21, 2012 at 02:03 PM.
Old May 21, 2012, 11:32 PM
wyowindworks is offline
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Just fly it!
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Here is video that I did recently on using a bladder and seaming. I don't like the string technique because it's one extra step. I like the staggered seam so I don't have to fuss with it.

Layup of The Wyoming Wind Works DLG Fuselage - Economy (11 min 1 sec)


BTW, you did a great job on your first bladder assisted part!!!
Old May 24, 2012, 03:24 PM
Sean Oelofse is offline
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.....till the wind drops.
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Quote:
Originally Posted by Vic101 View Post
450mm wide, 40 micron stretch film.
I have a roll J!
Its ike THICK cling wrap.
I used it too wrap the in-laws bags when they go overseas.
You are welcome to it!
Old Jun 05, 2012, 05:23 AM
Fubar 123 is offline
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How goes the build J ?
Old Jun 05, 2012, 03:43 PM
johannlochner is offline
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Stirring the pot
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Quote:
Originally Posted by Fubar 123 View Post
How goes the build J ?
Hehehe
If I can stop breaking things, I may get going!

Sorry guys, I will try.....
The second nose cone has been cast with a paint in the mould finish.
The seaming and split line came out very nice.
Thanks Vic, the baking paper made all the difference when making the bladder!
I've started reshaping the plug, so lets see!
Old Jun 05, 2012, 04:34 PM
Zenmaniac is online now
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Building with TLAR precision
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Quote:
Originally Posted by johannlochner View Post
Hehehe
If I can stop breaking things, I may get going!

Sorry guys, I will try.....
The second nose cone has been cast with a paint in the mould finish.
The seaming and split line came out very nice.
Thanks Vic, the baking paper made all the difference when making the bladder!
I've started reshaping the plug, so lets see!
Looks really nice, J. Is what looks like fiberglass on the seam line just paint overspray? I'd like to see how you used the parchment paper, if you have any pix.

-= Dave
Old Jun 07, 2012, 12:14 PM
Drusky is offline
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just a rumour
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Johann I have rolls of sachet material x meters long and about 500mm wide. It seals very well, we can stand on our 1L sachets with one foot, full weight. The rolls I have lying here have printing defects, the material is fine otherwise. I can bring you one if you like. Might be handy for bladder experimentation. The ink can be wiped off with methylated spirits (rubbing alcohol). For our international folks I will explain the sachet concept. We buy our milk here in little sealed bags like this:

packed using machines like this http://www.labomat.co.za/products-em2.htm
Most of us load the sachet into a jug like this:


Andrew
Old Jun 07, 2012, 10:24 PM
JimZinVT is offline
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let's FLY!
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That's very clever and earth-friendly packaging. But can you pull it out of the fridge and guzzle milk straight out of the container like I do with our wasteful 1 gallon plastic milk jugs? It really makes my wife mad....but she's quit trying to stop me after 20-odd years.

I would guess chugging from the sachet would look something like this (not that there's anything wrong with this!)

Buffy got milk (0 min 17 sec)
Old Jun 07, 2012, 10:50 PM
surfimp is offline
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Piscine Promulgator
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So that's why Buffy was so popular! I really gotta start watching TV, I'm missing out!

Johann it's looking really nice, I can't wait to see this thing take flight! Your work looks amazing.

Steve
Old Jun 08, 2012, 12:39 AM
Sean Oelofse is offline
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.....till the wind drops.
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JimZinVT,
Sorry bud!....but you don't understand!....Drusky is from Distrist 9!...Google it! ;-)


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