USS Sulaco / Aliens

Alien99 said:
in this point..the positive news ends.:confused:.....after glueing the belly parts to the torso ..the whole thing began to screw...it take 2 nights to become fully visible...wall1.....maybe THIS is a negative aspect of the cube system.there must be some weight on the parts when you glueing big area. after pasting the big pars together there must be some torsion forces appear....damnwall1wall1wall1

what I ve gonna do with it?...any idea?....Ive released some force by cutting some cubes across....maybe it will e better after pasting the rounded parts above the hangars....maybe not....who knows....:confused:
Click to expand...

Maybe i have an explanation.

If you glue the parts togehter, the glue must cure.
This means it will shrink a little bit due to loss of mass (the dissolvent)

So if you have a glue surface with different sizes top and bottom there will be an different shrink. And because the glue is stronger than the paper it will bend the paper. Depending on the rigidness of the glued togehter parts there could ( or is ) an bending and torsion of the overall structure.

My solution would be an super stiff and strong internal sturktur where the outside is glued on. This will also help with the overal strongness of the model...

In this certain area i could offer an solution in terms of engineering.....

You could make the narrower middle part some 20mm higher and build some recess, which have to be greater as the increase of the middle-part, in the top and bottom parts. the middle part can slit in the recess of the top and bottom. so you need some high limiter as extra part or message.

if there is some bending of the parts this will not affect the bulding so long as is it is not a too big torsion.


by the way ......

You may be have covered 23% of the size of the model, but i think its well more in area of around 10-15% of parts.......
Just keep on trucking
 
Looking bloody marvelous man..

Perhaps keeping an eye on the humidity level in your workspace. I know that can warp wood. Sealing the ends as well can perhaps resolve puckering as well. I would almost want to put it in a empty aquarium when not being worked on to keep the parts from picking up moisture in the air. Or installing (ramping up) a dehumidifier to keep the card from picking up ambient moisture.

Send a note to Koolik over in the Big Boy thread. He had similar difficulties when building the tender. He painted it after construction so he added moisture directly to the model..
 
I think that Nosports has identified the possible cause of the distortion. This would be aggravated for large areas where rate of cure may be different between the edges (faster) and the centre (slower). I was reminded of this last night when a simple 3 layer laminate of 300gsm card from a couple of nights before, developed a notable twist lengthways (wish I could get it to do this when I am making props!). I had been a bit lazy and hadn't followed SOP in plonking a heavy flat object on top of the part while it was curing (for 3-4 days and it was only a couple of inches long).

Perhaps with large parts like Jan's Sulaco, it maybe necessary to secure them in a frame/support while they are curing. It would be easy enough for the flat/square section parts, not too sure about curved ones...
 
I mentioned the internal supports at first to prevent this and large panel deformation.
 
That torsion problem is the reason why I avoid water based glues for my paper models.

I use always the german "UHU", a solvent based glue. It comes in a tube (for smaller parts) as well as in a large stick form (used for large parts). No problem with torsion / bending since I use only this stuff.
 
Basically, if you make sure the outside parts are dry, and glue the internal boxes together with supaglu, it shouldn't warp at all...

Also, Jan, the graphic you showed us with the top section and what appears to be a panel with an "explosion star pattern" on the side, what is the smokey star pattern? what causes it? is it even relevant?
 
BradAmeerBeg said:
Basically, if you make sure the outside parts are dry, and glue the internal boxes together with supaglu, it shouldn't warp at all...

Also, Jan, the graphic you showed us with the top section and what appears to be a panel with an "explosion star pattern" on the side, what is the smokey star pattern? what causes it? is it even relevant?
Click to expand...


The ship is a military machine and spends its time in space. Battle scars, small objects banging against the hull...
 
There 'should be' one on both sides. Notice that the star scaring is inside a circular object and not on a random plate.
 
Unless of course it's firing parallel to the hull. You could say it's a pop-out thruster for combat maneuvers which rotates to fire in multiple directions and which pulls in for noncom duties. Such a thruster would scar the hull paint in that pattern while at the same time not appear as a thruster as we know it (like the Sulaco's engine system) and it would also run hot, so the top disc would be burnt as well. The top part could also pop open to direct the thrust 90 deg. perpendicular to the hull for side-to-side maneuvering.

And as you say, it's sci-fi. *We* get to make up our OWN logic! :cool::twisted:
 
I think that the black point on the side is some sort of rocket silo or so...:mrgreen:

anyway....here is a small new progress:thumb:

front part of the upper structure is done....the front of the ship is now prepared for antenna array:twisted:

progress037.jpg


direct side view:rolleyes:

progress038.jpg


zoom of the new part...the white places represents the antenna array base:twisted:

progress039.jpg


upside down...

progress040.jpg


and back detail...:p

progress041.jpg


more soon...:wave:
 
I agree, quite nicely! I can't wait to see it completed, and then I may download and print my own copy to build up. :mrgreen:

Every time I look at the incredible panel work on this beast, I am floored! You really captured the 'feel' of Aliens with the texture on this ship. :thumb:
 
You must log in or register to reply here.
Top Bottom