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Thanks Mark,

 

then stay tuned, this could actually become an adventure ... up040577.gif&key=327a20a361d18ad6d35cabf

 

BTW, tonight I counted the rings on the LO2 Tank again, more on that later. cant-believe-my-eyes-smiley-emoticon.gif

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Hello everybody,

 

let's go on with the analysis of the SOFI Rings. cool.gif

 

Since my first count of the rings on the LO2 Tank on this ET-8 photo seemed to be a bit vague and upto the top was incomplete anyway due to the lack of resolution, rolleyes.gif

 

up063230.jpg
Source: retropaceimages.com (STS-6)

 

I repeated the count again today on this new (old) photo of the ET-8 because its resolution is much better. top.gif 

 

eloNck.jpg
Source: forum.nasaspaceflight.com (Jester)

 

For this I had set the zoom mode (MS Word) to 250%, where one can see the rings pretty well, and came up to 66 rings. up045518.gif

 

And that would have to be roughly the area, where at the Airfix-LO2 Tank, which is 81,5 mm long, the front Nose cone cap is put on, the tip of which unfortunately broken several times and must be replaced. huh.gif

 

35Z4Vl.jpg

 

With this the determination of the ring widths was made, or in slightly more complicated expert wording, the Valley-to-Valley distances:
 
81,5 mm : 66 = 1,2 mm, which agrees well with the value of 1,3 mm for the rings determined on the LH2 Tank, and would match also from the optical impression. speak_cool.gif

 

Unfortunately, in the photo above, the Nose cone is covered with foil, but in the following image one can see different cones on LWTs of the first generation (1988), whose shape is interesting for scratching, top.gif

 

339IG2.jpg
Soure: forum.nasaspaceflight.com (Jester)

 

and therefore here once more a slightly larger section. 

 

xxw1zZ.jpg

 

And already thereon one can see that the Nose cones of the LWTs looked a bit different, than one knows them in Graphite composite version from the last missions with SLWTs. up040577.gif

 

7jGxkh.jpg
Source: californiasciencecenter.org

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Hello everybody,

 

there are enjoyable news. cool.gif

 

Fortunately Michael Key had compassion for me and has modified his 3D model of the IT, bow.gif so that I can save me the painstaking post-processing of the Thrust Panels by using my mini-saw, which I had tested about a week ago.  speak_cool.gif 

 

up064197.jpg

 

Here is his 3D-Update of the  flown STS-6 tank ET-8, which is now to be found at Shapeways under its new name Early LWT. top.gif

 

Mq5aOo.jpg
Source: Shapeways (The Aerospace Place)

 

Before this action, I noticed still just in time that at his previous model still lacked two small details that I had previously overlooked. rolleyes.gif

 

So far I had mostly only ET photos of the side facing the shuttle, but hardly any of the opposite side.  

 

1enuyl.jpg
Source: retrospaceimages.com (J. L. Pickering)

 

There I was always fixated only on the Access Door and the Carrier Plate Assembly.

 

But also on the back there are exactly opposite the same two items as on the front side, as one can see in this photo from George Gassaway. The pink circle involves the RSS Antenna and the blue circle an aerodynamic Vent

 

VvqMVZ.jpg
Source: georgesrockets.com

 

And exactly these two items were missing on the back of my IT, which of course could not stay that way,  i5684_no2.gif wherefore I should have to scratch them if necessary.

huh.gif

 

up061813.jpg

 

But these two things Michael Key has kindly complemented next to the modification of the Thrust Panel Ribs, so that the IT now is perfectly matching the Early LWT. up045518.gif

 

AH8gpA.jpg

 

NtOxJv.jpg

 

rfuvsG.jpg
Source: Shapeways (The Aerospace Place)

 

And this IT I have ordered now once more in WSF and will probably use it in this form for my ET. up040577.gif

 

BTW, the IT modeled for my ARC friend Mike (crowe-t) for his STS-135 (ET-138) Shuttle stack is offered at Shapeways under Late SLWT. top.gif

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Really nice save Manfred!

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Hello everybody,

 

today, still a supplement to the 3D-Intertanks. top.gif

 

Meanwhile, Michael Key still also offers a further modified Airfix-IT. And that is the Early SLWT, which was flown since the STS-91 (ET-96), which here is presented in the new Shapeways Design. huh.gif

 

lsOM7W.jpg
Source: shapeways.com (The Aerospace Place)

 

For this he only needed to modify a few details on my previous IT,

 

ARn6pv.jpg

 

which he thankfully has done too. bow.gif

 

Here once again the front side with the 26 Integral Ribs and the 7 Circumferential Ribs in the Thrust Panels, etc.,

 

gYML5F.jpg

 

and here the back with the Graphite Composite Access Door and the Vent

 

iaGzWY.jpg

 

This configuration of the Early SLWTs was flown up to the STS-107 (Columbia disaster), starting with the STS-114 the PAL Ramps were omitted at the Late SLWTs, and from STS-122 then also the 7 Circumferential Ribs

 

There are now three versions of the Airfix IT (1:144), my Early LWT, which is now on its way to me, and next to the Early SLWT also the Late SLWT, all of which can be found here both in WSF as well in FUD. up040577.gif

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Hello everybody,

 

meanwhile, I did ask my ARC friend Joe (crackerjazz) if he would not even have time and inclination for modeling the Crawler Track Shoes in 1:160, whereupon, to my surprise, he has started right away. cool.gif 

 

BTW, he did also the 3D design of the Aft Skirt Thermal Curtains (ASTCs) for my SRBs

 

And what the CAD expert has delivered with the help of the drawing without further ado, is simply stunning again, I think. erschrocken2.gif 

 

There's nothing like a good technical drawing with measurements, even if they are just so on the limit of readability. rolleyes.gif

 

43782685652_e143a8751c_b.jpg
Source: arcforums.com (crackerjazz)

 

28894586417_6952bc175a_b.jpg

 

43782685292_78b6b2a5ef_b.jpg

 

28894586187_4dbb1d2025_b.jpg

 

43782685222_fbcb86ae0e_b.jpg

 

43782685002_fbcb86ae0e_b.jpg

 

Now he has to downscale the Track shoe "only" still to 1:160, whereon I'm really curious. top.gif

 

Hopefully there will be some left over from the details after 3D modeling, especially as one can see based on David Maier's Paper Kit how small these things are in 1:160.  eek.gif

 

m3kLpg.jpg 

 

While the holes in the Pin lugs (Ø 3,3'') with Ø 0,5 mm (1:160) and the 0,4 mm (1:160) wide grooves (green) should still be printable,   

 

dzKwGe.jpg

 

ek3p2k.jpg

 

the small holes (pink) with Ø 0,2 mm (1:160) should unlikely to be printable, although one should be able to live without them, because later they are hardly recognizable anyway from a normal viewing perspective. smiley215.gif

 

Now I'm curious what my friend Joe is going to say, whereby Shapeways has the last word anyway.up040577.gif

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Hi Manfred,

 

  I did not realize that you were also going to build the crawler along with your launch model project.  With as much attention to detail that you are putting into this project, you'll be busy for another 20 years.  It's been 5 or 6 years to get this far.  A crawler and a launch tower!  We'll all be 80 years old when you finish this.

 

  The CAD drawing are really cool.  I hope that you get to keep the details when it is reduced, we'll see.

 

  Great job on this mighty project!

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Thanks Rich for your nice words, bow.gif

 

of course the Crawler should not be missing on my Launch padtop.gif

 

omgsign.gif20 years ... the Rollout of the Challenger to the Pad I want to experience in this life yet ... smiley_worship.gif At worst, I just have to leave out some details ... 00000016.gif

 

I really hope that the downscaling will be successful, therefore JC_doubleup.gif JC_doubleup.gif JC_doubleup.gif

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Hello verybody,

 

there are good news, because the Track Shoes look amazing after the download to 1:160. cool.gif

 

30126006838_aff824807a_b.jpg
Source: arcforums.com (crackerjazz)

 

42185393500_91c831a8b4_b.jpg

 

43946055602_cdacbfb0c0_b.jpg

 

But the exciting question is and remains, how these tiny shoes will look in the printed state? smiley215.gif

 

Now my friend Joe should connect the shoes but still together to a set, as can be seen in Simpson 3D Design, because referring to printing it should be more favorable and therefore cheaper than 20 separate parts. top.gif

 

710x528_5069749_1240231_1459323880.jpg
Source: shapeways.com (Simpson 3D Design)

 

This has also been confirmed to me by Shapeways because the production team only needs to handle a single model instead of 20 separate parts when printing a set with sprues. As a result, planning the models for printing and cleaning/post-processing is cheaper. And although there are more material costs, the labor/handling costs for a set are lower! speak_cool.gif

 

Then I was still interested, which arrangement of the shoes in the set would be more favorable for printing, standing upright as in Simpson's set, or if the shoes would lie flat?  hmmm.gif

 

And the answer to that was very interesting and extremely important. cool.gif

Although the position for Shapeways doesn't really matter, it's favorable to keep the parts flat and as close as possible (smaller footprint).  

 

If one keeps them flat (rather than stacking on top) it will reduce the amount of wax required to print in Fine Detail Plastic (so less support material sticking to the set), which is very important for subsequent cleaning the sets, if I remember the pull-ups at my FUD-IT ... eek.gif 

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2 hours ago, Caerbannog said:

You should write a book on this build - "The definitve guide to Space Shuttle builders" or so 🙂

:mike:

 

Thanks for your nice compliment, :worthy:

 

but I'm already writing at this book the whole time ... up040577.gif

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22 hours ago, Mustermark said:

Amazing work on these new developments. The crawler tracks will be another must-have when they are ready!

Thanks Mark, :worthy:

 

but keep in mind that the shoe size is only 1/160up040577.gif

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Hello friends,

 

meanwhile we are one step further, but unfortunately still not at the finish because the shoes are still pinching a bit. hmmm.gif

 

My friend Joe has now inserted the supports into his  3D-Model, which corresponds to the configuration of Simpson 3D Design, but has in my view not selected the most favorable arrangement of his model (see below), which I had actually recommended him after consultation with SW. smiley_worship.gif

 

30165054008_4f2d682796_b.jpg
Source: arcforums.com (crackerjazz)

 

At first he had uploaded the upper version with upright standing 20 shoes, for whatever reason, whose price (10,80 €) but seemed suspicious to me, rolleyes.gif especially since from Simpson 3D Design the set of 20 (1:144) for 7,81 € is offered. huh.gif

 

And the result is now the lower variant, which would be acceptable in terms of price (7,61 €), but does not seem to be the preferred direction for minimal support wax residues, if I did understand SW correctly.

 

But just that would be strived for the Ultrasonic cleaning of the FUD shoes, which I still well enough know from my FUD-IT know. smiley_worship.gif

 

But, as I've heard from others, SW is principally indifferent to this aspect because they print the models (against better conscience) as they are uploaded by the designer, as the customer ultimately pays for it, which is why I'm going to grill SW once again because of the preferred variant. top.gif

 

Regarding the prices, I was surprised that the even finer version Smoothest Fine Detail Plastic, formerly FXD if I'm not mistaken, is only marginally more expensive (7,78 €)!!!  speak_cool.gif

 

Unfortunately I only have a comparison between FUD (left) and FXD (right) based on my ASTC Rings, which do not have as small details as the Track Shoes, as one can see here, huh.gif

 

up061320.jpg

 

which is why I'm not sure if FXD would actually make a noticeable difference in the details of the shoes? undecided.gif If so, I would prefer FXD for these little shoes (14,3 mm x 2,5 mm). cool.gif

 

Therefore I made my friend Joe still aware once agian and asked him to turn the middle arrangement 90° and put the shoes flat on the running surfaces as this in my view should be the most favorable arrangement of the model, if I understood SW correctly, so that during printing (FUD/FXD) as little as possible wax residues remain. huh.gif

 

tOhqNP.jpg

 

Now I'm curious what will come out ...  up040577.gif

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