Horst Air Filter Printing

[peteski]

I'm not sure what to do about the exhaust stacks.

Why support them of course! 
Just connect them all together and then to the air filter with a 1mm sprue.  I say 1mm because Jason's design (in another thread) used 0.97mm sprue and it was rejected.

Since this is 3D printing, you can attach the sprue to your parts where it can cut off without leaving visible scar. Like on the bottom of the stacks and the air filter.

[kalbert]

The concern with the stacks was the thickness of the actual stack part, the base is too thin to have walls that thin come right out and be that tall I guess.

I'm fighting the 1mm sprue now, .98mm wont' cut it so I'm upping them to 1.15, that should be plenty of meat I hope!

[spookshow]

I've got a few Atlas SD35 shells sitting around here (off of which I could hack the stacks). And since I just recently matriculated from Mold-Making and Resin-Casting U, I could certainly whip some up. Just let me know! 

Cheers,
-Mark

[kalbert]

I'm not sure the SD35 exhaust would work, I think at that time the exhaust stack was just one single large rectangular unit rather than the small oval jobs on the earlier units:

http://www.rrpicturearchives.net/showPicture.aspx?id=1888087

[spookshow]

Oh, well if you're going to go all "accurate" on me I will have to withdraw my offer. I only do mediocre modeler stuff 

Cheers,
-Mark

P.S. Seriously though, if you would like to cast a stack, let me know which one and I will give it a go. I'm on a first name basis with the new Atlas CEO, so acquiring the requisite shells shouldn't be an issue 

[kalbert]

Sorry to get all rivet counter on you...  The exhaust stacks on the GP7/9 shell are about the prettiest I've seen, though I don't know they measure up scale wise. If you've got the interest (and connections) to give it a go I'd be appreciative!

As far as the filters go... revisions to the sprue have been made, order placed... fingers crossed.

[kalbert]

UP's says they'll be here Thursday. The suspense is killing me!

[peteski]

UP's says they'll be here Thursday. The suspense is killing me!

Union Pacific?! 

[kalbert]

They're here! 

Please excuse the poor cell phone snaps, I was to excited. As delivered they are a bit rough, some texture all over them but I imagine after some light sanding and a coat of primer/filler they'll be fine. The panel on top is indistinguishable from the rough finish, should have made it a bit oversize. Overall they look a tad on the small side too. As a whole I am quite pleased, and probably going to chalk this up to "good enough" unless any of the keen eyes here can spot any glaring issues. Here is one I clipped from the tree and dusted with Sand paint to make it stand out better. Yes I know this is a dynamic shell. It's all I have on hand at the moment...

[milw156]

Any idea when they will be available for purchase?
Rick

[spookshow]

I'm told that a toothbrush and toothpaste will get rid of the fuzz (although I haven't actually tried it myself).

So, how do we get these?

Cheers,
-Mark

[kalbert]

I'll give the toothpaste a shot!

As soon as I get my camera back and take a real picture I'll post a link to them on Shapeways. I've got to warn you though, they're not cheap and Shapeways is the only one getting rich on this stuff. I'm just happy to have air filters!

[FEC Railway]

any plans to do the IC rounded type?

[kalbert]

For sure! Should be pretty straightforward to modify the design. I'll work on doing that.

[FEC Railway]

I guess the next step would be GP11 air intakes. 

I've been kinda formulating a little plan of attack to make 1 to 5 of these, one evening I'll have to load up on beer, Atlas Shells, and x-acto blades and give it an attempt.  Always thought it might be easy to attack part of it in Shapeways...



Pardon the Color wheel: 
Red would be the shapeways "frame" for the bash consisting of the raised portion under the long hood, immediate section after the cab, cab base and short hood.  The battery boxes would be part of this, but would be flat surfaces onto which BLMA doors could be added (orange).  finally, the traction motor blower duct (assuming that's what that is along the walkway) would be added and all of this built on a sort of plug that fits into the atlas GP9 sill.  The handrails would have to be brass wire.

The purple portion I have, in the past, sourced from the LL GP 20 and a Mocalova part, but could be easily made in Shapeways - I think?

The rear would be a Life Like GP18 or Atlas GP9 long hood cut to fit, similar to the Randgust CF7

I have several sills already modified with SD60 style anti-climbers in this case highlighted in red.

An Atlas GP30/40 cab (depicted in green) 

I think it'd be an interesting project.  Truly a unique and hard to build loco BUT if you didn't do it all in shapeways, you'd save yourself the hassle of all those doors with rough finish.

Thoughts?