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Old 04-12-2005, 01:43 PM   #1
doon
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Default Question about hangar bay?

Guys,
Would any of you have a suggestion on how create the green triad shaped lower walls of the hangar bay?
I'm looking at having close to 7' of it running the diorama
Thanks
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Old 11-12-2005, 04:44 AM   #2
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Any help for doon?
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Old 12-12-2005, 04:08 PM   #3
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Arrrrrrgggggggg!!!!!!!!!!!!!!!!!!!!!!

I spent 15 minutes typing up instructions, and the damn thing asked for my password a second time, and swallowed my entry.

I'm late for work, I'll repeat this later.

In the meantime, the template below is what I used for my baseline.

Height of wall scales out to 18.5cm base to top of upper section.

More details later.

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Old 12-12-2005, 04:13 PM   #4
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Aaaaaaaarrrrggggggg!!!!!!!!!!!!!!!

I was in such a hurry I uploaded the full size image to photobucket, and not the scaled down, 600 pixel wide version.



Sorry.

Damn.

Moderator, please go ahead and delete the big one.

Here is the one I intended to put in.

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Old 12-12-2005, 08:43 PM   #5
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[quote="john_trek"]Arrrrrrgggggggg!!!!!!!!!!!!!!!!!!!!!!

I spent 15 minutes typing up instructions, and the damn thing asked for my password a second time, and swallowed my entry.

It does that to me sometimes but if you just click the Back arrow in the top left of the screen the computer should restore it all. You then need to highlight the text and copy it - then go forward and re-enter your password and then you can paste the words back in and its done.
cheers
__________________



....... S.I.G David Mark Sisson
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Old 12-12-2005, 08:48 PM   #6
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Thanks John
At those ratio's, I'll have enough clearance for girder work and such.
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Old 12-12-2005, 08:50 PM   #7
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I've learned the hard way to always copy before I post. No biggie, Just as long as the server doesn't crash, I'm happy
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Old 12-12-2005, 09:44 PM   #8
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Quote:
Originally Posted by doon
...always copy before I post...
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Old 13-12-2005, 04:20 PM   #9
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OK, here are the basic patterns, and a hastily drawn set of instructions.

There are two basic shapes. The two identical "sides" which make up the longer pointy end of the tri-bump, and the "base" which makes up the third side. Using my method, the bottom of the bump where you glue it to the wall is open, so there is no 4th side.

After you make a couple of these things, and get the exact size you want, you can mass produce the triangles, by drawing a repeating pattern on the 0.03 sheet styrene with pencil, and scribing multiple long parallel lines. I did it this way, typically creating 20-40 triangles at a time. The base piece is particulalry easy to make this way.




After you have cut your triangular sides and bases, you use the wall template I provided earlier. Draw directly onto the wall (I used 0.06 sheet styrene) the outlines for all your mega-triangles (set of 4 tri-bumps inside a common border).

Use 0.1 x 0.125 pre-cut strip styrene (I used both Plastruct and Evergreen in the project) to outline each mega-triangle Glue the strips in place.

Following instructions below, bevel all of your joining edges of the triangular pieces. Glue together the two sides, then before the cement is dry, bend the peices to shape, and place them inside the template onto the location that tri-bump is going to occupy. Use the strip edges you just glued down as your guide and spread the two peices until they touch both edges. Let the piece dry enough to handle (I actually used super glue at this point inside the piece to make the connection stronger).

Pull the piece out, and if you are very, very lucky, the base piece should fit perfectly and you can glue it in place. (good luck, it only happens about 1/2 the time).

If the base doesn't fit, don't bend the sides to fit (they already fit perfectly in the template, remember?). Cut the base to the correct shape, then glue it on.

Repeat these steps for the next 2 weeks.


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Old 13-12-2005, 09:34 PM   #10
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Thanks Immensely John,
This is great information
Will be hitting up my local hobby shop this weekend
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Old 13-12-2005, 09:52 PM   #11
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Don't forget to buy some putty, you'll be doing that a lot, too.

As for the corners, I forgot to mention that when you get to the end of a peice or into a corner, one of your mega triangles will have to be cut in half.

If you're daring and know how to resin cast, that will save some time. I know how to cast, but had run out of resin after casting 30 or so modified vtol thrusters for a couple Eagles, 10 or 20 of the connecting doors, and so on ..... so I just said to hell with it and did it by hand the whole way.

And if you really, really want to save time, contact Jim Small, and offer him huge sums of money to get out the rubber molds he used years ago for his hanger bay walls. It was his project shown in the 1999 special issue of Sci Fi Modeler that first made me seriously consider doing this project.
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Old 14-12-2005, 01:00 AM   #12
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John,
The guys at SFMUK are encouraging me to cast, My local hobby shop owner says he'll teach me, however, it looks kinda intimidating to me
The mucho bucks to Jim Small for his excellent work would work if I had the mucho bucks (still trying to set aside for a spine booster)
So know that I really do appreciate you taking the time to put this info on here, Plus I'm sure there are some more maniacs on here that this will be of benefit too.
So looks like I've got to roll up the sleeves dive in
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Old 14-12-2005, 01:13 AM   #13
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Reckon the wall sections could be vac-formed? Or would that look like sh..

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Old 14-12-2005, 01:17 AM   #14
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I was thinking the same thing. The originals were vac formed I believe.
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Old 14-12-2005, 02:07 AM   #15
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Interesting. I had always guessed that those sections were vacuformed, looks like everyone else has the same impression.

Doon - I've always found the hardest part in casting parts is finding a supplier that sells resin you like working with. Building the molds is fairly simple. Mixing and casting parts is easy.

It gets a lot tougher if you need to make a two part mold, or have narrow sections on a complex part, dead ends inside the mold that are likely to trap bubbles, and so on. But if you've got a simple geometric shape which only shows one side to the audience, it really presents little difficulty.

Of course, the person here praising the virtues of resin casting is the same guy who just did it all by hand .......
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Old 14-12-2005, 03:05 AM   #16
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John,
Sometimes, very rarely, the rougher road is better to travel.
'Specially when the end result looks so good
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