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Space Shuttle Launch Pad 39A with Challenger STS-6


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Hello friends,

 

after I've taken a look at the LH2 Feedline again and comparing it with my Reference photos,

 

9g2kI9.jpg
 
BlIDfa.jpg
Source: georgesrockets.com (George Gassaway)

 

up068094.jpg
Source: NASA

 

I have decided to remove the rings that are too narrow (0,5 mm) and to replace them with wider ones (1 mm), which are much better corresponding to the original. cool.gif

 

No sooner said than done! But when I measured the stub then after grinding off the rings, its diameter was instead of 3 mm only 2,7 mm, which I did not like. rolleyes.gif

 

RU2QV8.jpg

 

That's why I took a rod Ø 3 mm and bent it under hot air according to my proven Balsa-Bending-Technique. up045518.gif

 

3A4Pwf.jpg

 

But as it is sometimes, if one has not bent anything for a long time, this bending process did not go satisfactorily, because the lower balsa support behind the kink was too short, so that the kink of the rod was not bent exactly enough, but was slightly rounded as one will see. 

 

5zQUlM.jpg

 

I have taken this into account by a longer slope of the support and a more stable clamping of the rod, which has resulted in a more accurate bend, 

 

BfCrop.jpg

 

what one can see in the following picture by comparing the two bended rods. top.gif Above it are already to see  the 1 mm wide rings, which I have cut off from a tube with Ø 4 mm, which I have previously drilled out to 3 mm.

 

t5rfL3.jpg

 

Then I have filed the new stub to the required length and drilled a hole for the guide pin (Ø 1,2 mm),

 

fY728r.jpg

 

and glued it in place.

 

ATElyF.jpg

 

Here the two rings have been pushed onto the Feedline, which I will glue with MEK. speak_cool.gif

 

QKepwd.jpg

 

And so the new LH2 Feedline looks like after fitting, 

 

OomdG1.jpg

which I like much better now. top2.gif

 

XJa1Wt.jpg

 

And now I could also adjust the Feedline Brackets, which sit directly above the upper ring. But if one looks closely, one can still see a further ring directly below the Umbilical Plate.

 

ZHCRv9.jpg
Source: forum.nasaspaceflight.com (DaveS)

 

And this ring I have now also housed yet, as one can see in these two pictures, wherewith I now let it be good.  top.gif

 

LifFbT.jpg

 

owKvxc.jpg

 

The odd little cutouts in this ring I prefer to avoid because the ring might not be able to bear it. 

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Hi Manfred.

I love the improved LH2 feed line and agree that the tighter radius bend looks best.

As I was looking it occurred to me that if you were determined to have the indentation features that perhaps they could be achieved by pressing a heated piece of metal into the surface rather than trying to carve them out. I sometimes forget quite how small all these parts are so this may not be possible.

 

Keep up the inspirational work! :)

 

Kirk

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Thanks Kirk for your well-meant inspiration, but as you said yourself, these parts are so small that one can barely handle them. eek.gif


But you've egged me on a little bit, smiley250.gif so I'll try to apply the little cutouts in this upper ring by using my smallest round file, wich is only 0,5 mm at the top.

 

21Udeq.jpg

 

And I think that should work, keep your fingers crossed! JC_doubleup.gif

 

BTW, above one can see one of the two tiny LH2 Feedline Bracketscant-believe-my-eyes-smiley-emoticon.gif

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  • 2 weeks later...

Hello everybody,

 

but as I mean by this time, these recesses in the upper rings seem to be filled up conclusively with the appropriate TPS material, which is why it is unnecessary. cool.gif

 

Furthermore the Support Brackets for the LH2 Feedline also look different and are also mounted differently than the brackets for the LO2 Feedline on the right side. 

 

up068094.jpg
Source: NASA

 

As can be seen from this image, the two LH2 Brackets are not rigidly connected to the crossbeam like the LO2 Brackets, but rather are slightly laterally movable by Hinge elements, which is said to allow unrestricted relative distortion between the rear ET and the orbiter. huh.gif

 

up068443.jpg
Source: NASA

 

More precise information about the shape of the outer LH2 Bracket is given by this drawing, from which I have also determined the dimensions, whereby I've used the width of the Airfix Crossbeam (2,7 mm) as reference measure. top.gif 

 

RsxbkF.jpg
Source: System Definition Handbook SLWT, Vol. II (Lockheed Martin)

 

However, one has to keep in mind that this is the SLWT Handbook, i.e. this is how the Super Lightweight Tank (SLWT) looked like, which was used starting at the end of 1998, with some modifications in order to reduce weight in favor of larger payloads, compared to the Lightweight Tank (LWT) used for the first time at STS-6 (ET-8)

 

And as a further closer look at just this ET-8 shows, the inner bracket looks a bit different than my previous one,

up067836.jpg
Source: forum.nasaspaceflight.com (Jester)

 

which is why I've modified it a bit (right). top.gif

 

27gGKL.jpg

 

In order to finally fix the brackets and bond them with the Crossbeam, I put the Orbiter back on and fixed it with tape to see the exact distances and to adjust the brackets accordingly.

 

ztcYwL.jpg

 

And in this position, the inner bracket was  glued by using MEK with the Crossbeam and the LH2 Feedline.  up045518.gif

 

9HEDnQ.jpg

 

And now to the preparation of the outer bracket, which is drawn slightly longer, to which later the two holders for the LH2 Cable Tray are glued, as can be seen from the drawing. 

 

g1ad3H.jpg

 

The front cable tray mount is nice to see in this photo, but whereby the two Umbilical photos in the capcomespace dossier are reversed unfortunately. smiley_worship.gif

 

io79ud.jpg
Source: capcomespace.net

 

This was followed by the fitting of the outer bracket,

 

81Rhnb.jpg

 

and their cutback to the right length,

 

bWqiM0.jpg

 

and finally their gluing with the crossbeam and the feedline with MEK.

 

7PeDWH.jpg

 

Then I was able to remove the orbiter again and scrutinize from all sides the LH2 Feedline, glued on the crossbeam. spiegel-smilies-0002.gif

 

hU6jAQ.jpg

 

G2ZeUW.jpg

 

And now I could either glue the LO2 Feedline Brackets or lay the LH2 Cable Tray on the front of the Crossbeam.  up040577.gif

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Hello friends,

 

I've now chosen to glue the LO2 Feedline Brackets, for which I've now also used 1 mm Styrene, so that the strengths of the brackets on both sides are the same. cool.gif 

 

However, I've only glued the brackets to the Crossbeam, and not to the Feedline, because I still have to glue the rings next to the Feedline supports, as well as the front missing support behind the Intertank, for what I need enough freedom of action. 

 

Y5Pq0l.jpg

 

The positioning and gluing of the tiny brackets was quite tricky, but then I've managed it quite well.  top.gif

 

Ar3oFs.jpg

 

N7cuqS.jpg

 

And the Diagonal Cross Strut fits in between quite well too. speak_cool.gif

 

6yqB3o.jpg

 

Then I've still glued the Resin-TPS-Claddings to the Vertical Struts, so they will not be lost. huh.gif

 

pOt89i.jpg

 

And now it can go on with the LH2 Cable Tray on the crossbeam. up040577.gif

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Hello everybody,

 

in order to be able to scratch-build the LH2 Cable Tray as completely as possible, which I'm intending, I first had to clarify its continuous course, which lasted long enough. rolleyes.gif And this course can be subdivided into two parts. top.gif

 

The first and much longer, but simpler part extends over the entire LH2 Tank, starting behind the Intertank, and then flows into the right Vertical Strut at its top end (see yellow circle). For the moment, however, I will defer this part until later, because it has to go along with the laying of the Ice Frost Ramps of the GH2/GO2 Press. Lines, what will follow later.  

 

y6fLrb.jpg
Source: forum.nasaspaceflight.com (DDG40)

 

In this strut, the cables then run upwards and enter the gray "Distribution box" from behind, 

 

nBIG8f.jpg
Source: forum.nasaspaceflight.com (DaveS)

 

and from there the cable tray runs on the front side of the Crossbeam to the other side, which I will show in more detail. cool.gif

 

up068102.jpg
Source: Scott Phillips

 

And now follows the difficult and time-consuming part of every scratch exercise, in which I always have to determine the required dimensions of the individual parts by using suitable reference photos/drawings. rolleyes.gif

 

One is spoiled for choice, depending on which reference measure (yellow) one refers, either to parts of the original photos, or to those of the Airfix Kit, which then sometimes can lead to a compromise between the two possibilities, so to speak on something between.  hmmm.gif   

 

In the following photo, the transition from the "Distribution box" to the following Cable Tray is unfortunately covered, which is why I had to determine it by appropriate cutting lines to be able to estimate its dimensions.  

 

h78Umw.jpg

 

The dimensions of the "Distribution box" can indeed be determined well from the next image, but here the transition area to the cable tray is covered, which is why no clear reference dimension can be found. That's why in anticipation of the next photos I used the height of the Cable Tray (2,7 mm) as reference measurement.

 

yy5Oe5.jpg 

 

This is the already oftener shown photo by DaveS,

 

up067914.jpeg
Source: forum.nasaspaceflight.com (DaveS)

 

on which one can see in a rotated and greatly enlarged representation of the transition of the LH2 Cable Tray from the vertical strut into the "Distribution box" very clearly, whereby the oblique perspective allows no accurate measurement of the parts. hmmm.gif

 

1sFpwe.jpg

 

But there is this photo by George Gassaway

 

iUeTGl.jpg
Source: georgesrockets.com (George Gassaway)

 

which, in rotated and enlarged view, allows some important estimates due to the almost direct view, as well as the height of the Cable Tray (2,7 mm), previously chosen as a reference measurement, which in turn was determined from the diameter of the Thrust Strut of the Airfix Kit (Ø 3,2mm). speak_cool.gif

 

DSrDbR.jpg

 

And so the LH2 Cable Tray arrives on the other side of the Crossbeam, whereby here one also can see well the TPS cladding of the GH2 Press. Line. And from there it is only a short distance to the LH2 Umbilical Plate, into which both the Cable Tray and the Press. Line are inserted from the bottom, wherewith we finally arrived at our destination. top.gif

 

zlYsD3.jpg  io79ud.jpg
Source: georgesrockets.com (George Gassaway)                                   Source: capcomespace.net

 

And so now for the practical implementation, wherefor which I have used this drawing from the ET Bible.

 

Kp9wSi.jpg
Source: System Definition Handbook SLWT, Vol. II (Lockheed Martin)

 

Into this drawing, I have drawn as a reference measurement the distance between the two support points of the Airfix orbiter (32 mm) and then reduced the drawing to 1:144 and also still mirrored. huh.gif

 

And with this I have now tried to draw a true to scale template for the Cable Tray with the appendage of the "Distribution box" and print out, which I also managed to some extent.   

 

Kdu7x5.jpg

 

But what looked just so nice and catchy on the photos yet, shrinks on a scale of 1:144 after the expression again together in such a way, so I had to look twice when cutting out the Cable Tray.  cant-believe-my-eyes-smiley-emoticon.gif

 

nvD95W.jpg

 

And that's what the part looks like on the Airfix Crossbeam, top2.gif

 

eXpbiQ.jpg

 

which I now only need to transfer to 0,5 mm Styrene sheet and carefully to cut it out. smiley215.gif

 

On the right side of the Cable Tray one has to add this rounding and, if possible, also the 90° bend to the front, which one can see well in the zoom on this photo of the ET-121.

 

8hqTbp.jpg
Source: NASA

 

And for completion, all that is still missing is the TPS cladding of the GH2 Press. Line, which will be made later.  up040577.gif

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Thanks Manfred. You have made me realise that the SCA must have had these connection as well as a supply of LO2 and LH2 - otherwise the scene in that documentary film "Moonraker" where an orbiter fires its engines and takes off from the SCA would not have been possible to film. :wink:

 

Keep up the great work.

 

 

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Hello everybody,

 

as one can see in this photo, the TPS Cladding of the Vertical Strut is reaching still a bit more upwards, has a few steps there and looks thus a little bit different than the Newware-Resin-Cladding. huh.gif 

 

1sFpwe.jpg
Source: forum.nasaspaceflight.com (DaveS)

 

In order to enable the connection to the Distribution box of the LH2Cable Tray based on the original, I have tried to recreate these details and have glued tiny particles of the narrowest and thinnest Evergreen strips around the strut,

 

WbTgvg.jpg

 

BQRTE1.jpg

 

what was again a delicate fidding, smiley_worship.gif whereby the transitions still need to be slightly sanded.

 

5cya5g.jpg

 

Then I've fixed the paper template of the LH2 Cable Tray with the Distribution box on the Crossbeam again to see whether or how this matches with the clearances, and whether there is still enough space for this box, smiley215.gif

 

RrPRwD.jpg

 

which could be about right, as one can see here. speak_cool.gif

 

o02Wqd.jpg

 

Then I've transferred this template onto a 0,5 mm Styrene sheet and cut it out piecewise, for which I used my finest Mini-saw (0,1 mm) for the long cuts and for the short cuts my Chisel cutter

 

JGwPgL.jpg

 

AqNteg.jpg

 

And after that long cut, the part has been finally exposed, 

 

whl3Zv.jpg

 

Bu5dLI.jpg

 

and was then finely smoothened at the edges.

 

KAZfZ3.jpg

 

The following test fitting of the Cable Tray at the Crossbeam looked quite well,   

 

OLBrAD.jpg

 

Q7aA1K.jpg

 

so that I could turn to the small Distribution box for which I've used an Evergreen square profile 1,5 mm x 2 mm,

 

RnhN7D.jpg

 

which, however, was difficult to handle. rolleyes.gif

 

3qsMtP.jpg

 

tJiXUi.jpg

 

A1GxNM.jpg

 

As the test fitting of the Cable tray with the glued box shows, the seat is quite neat, so that only the sloping bottom side would be something to straighten. 

 

vcEtV2.jpg

 

0wsOVs.jpg

 

Then only the cable connection would have to be attached, after which it could then continue on the other side.  up040577.gif

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Thanks Mark for your nice compliment. :worthy:

 

Hello everybody,

 

in the meantime, I've attached this Cable connection between the Vertical strut and the Distribution box, for which I've glued two tiny pieces of Evergreen Strip which are barely noticeable. cant-believe-my-eyes-smiley-emoticon.gif 

 

8nEjtD.jpg

 

And now to the other end of this Cable Tray in the red circle, which after the arc at the end firstly goes down and then immediately runs rearward in a short 90° arc underneath the Crossbeam

 

nb2dce.jpg
Source: NASA

 

This course can be followed in the following photos. 

 

Yb50lh.jpg
Source: NASA

 

zlYsD3.jpg  io79ud.jpg
Source: georgesrockets.com (George Gassaway)                                            Source: capcomespace.net

 

In this drawing, the course of the two Cable trays is simplified depicted, but what is helpful for scratch-building. top.gif

 

Hbv9Nt.jpg
Source: System Definition Handbook SLWT, Vol. I (Lockheed Martin)

 

Behind the crossbeam follows at the end of the cable tray the angled transition of the parts with TPS Cladding (2, 3, 4, 5) up to the Umbilical Plate under the orbiter, which seems to be difficult to scratch due to the minimal dimensions of the parts, smiley215.gif especially since the clear height between the Cable Tray and the Umbilical Plate is only 3 mm, from what the height of the CT transition to 4 mm results, which should become quite tricky. analintruder.gif

 

GwcCeH.jpg 
Source: georgesrockets.com (George Gassaway)

 

RRdDnu.jpg

 

Afterwards I've tried the arc of the Cable Tray on the front of the Crossbeam with the help of my Balsa & Bending technique. huh.gif 

 

KypHXF.jpg

 

a0Ook3.jpg

 

1vvm5h.jpg

 

0Ehd9O.jpg

 

During mounting one has to make sure that the Cable Tray is not directly in contact underneath the Crossbeam but sits on a small spacer (0,4 mm) which is already glued here.

 

lpzGaV.jpg

 

As the test mounting shows, however, from the arc would leave almost nothing left, which would probably complicate a flush connection. rolleyes.gif

 

ObOQJI.jpg

 

Therefore, it will probably be better if the cable tray is first glued to the front with a bit of supernatant, after which a matching strip is glued  in the interspace which then is rounded.  up045518.gif

 

And this construction I've tested provisionally with tape, 

 

t8iWVK.jpg

 

and was surprised that the clear height between the Cable tray (0,6 mm x 1 mm) and the Umbilical plate is actually 3 mm and thus is perfectly in accordance with my previous estimates of the measurements.  speak_cool.gif

 

qLf2B5.jpg

 

And this is a first attempt to make the TPS arc (part 2) from a rectangular profile 1,5 mm x 3,2 mm,

 

YipIqm.jpg

 

whereby I am looking forward to the result.  up040577.gif

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Hello everybody,

 

but first I've continued with the LH2 Cable Tray and the associated tiny parts of the transition, which are all in the millimeter range and thus extremely tricky to handle, what only is feasible under the Headset magnifying glass. cant-believe-my-eyes-smiley-emoticon.gif

 

In the process, I carefully approached from all sides using my file set and my finest mini-saw (0,1 mm), whereby one must keep an eye on the required dimensions, which is for this bow 1,5 mm x 1,5 mm, which is why one has to measure again and again. huh.gif

 

zIhyOE.jpg

 

NrY6fK.jpg

 

437CIp.jpg

 

And since I prefer to work with a little bit of excess, a post-processing is still necessary, which becomes particularly tricky once the part has been sawn off. As a result, an undersize can quickly arise, which is not so good. smiley208.gif

 

So, choosing the Rectangle profile of 1,5 mm x 3,2 mm was not exactly brilliant and has unnecessarily complicated the whole procedure. smiley_worship.gif

 

That's why I used a Square profile 1,5 mm x 1,5 mm in the second attempt, which was much "easier" to handle, since the outer dimensions are already fit, and what I could have done better immediately.  up040472.gif 

 

At first I filed the rounding and then sawed off the length of 1,5 mm.

 

However, care should be taken during the following processing of this mini-piece,

 

pKDDtu.jpg

 

whereby I held it for filing the inner rounding with my Precision file (Ø 1 mm) in a Cross tweezer and at the same time supported it from below with the finger.  speak_cool.gif

 

7Hz871.jpg

 

And since the test fitting of the bow on the Cable Tray looked good,

 

CZyTYm.jpg

 

I then glued the bow carefully, 

 

O6fJq1.jpg

 

and something aligned yet, which resulted in a good fit of the bow. top.gif

 

McsjOy.jpg

 

Then I've cut the Middle plate (part 3) out of a Rectangular profile 1,0 mm x 1,5 mm x 2 mm,

 

NCFdJw.jpg

 

and glued it onto the bow.

 

fZAdCs.jpg

 

And after the successful fitting I was able to catch my breath,  popcorn.gif

 

0EdyQ5.jpg

 

because this transition fits quite well and there is still enough space for the oblique transition to the Umbilical plate (parts 4/5). top2.gif

 

miGGM2.jpg

 

And with this intermediate result I can be quite happy. up040577.gif

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Wow. The GH2 line is going to be tiny.

I like the way you keep the printout on the umbilical plate to make sure everything stays aligned.

 

Incidentally, I watched "Last Man on the Moon" (the Gene Cernan documentary) last night and recognised many of the parts of your launch pad. Superb!

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Hi Kirk and thanks for looking in on me. :worthy:

 

Yeah, the printout shows me where the Cable Tray has to meet the small circle (Ø 1,5 mm) of the Umbilical Plate, as well as the place of the LH2 Recirculation Line behind and the GH2 Press. Line left besides.

 

zlQgdh.jpg

 

BTW, the diameter of the GH2/GO2 Pressurization Lines is 2'', that means Ø 0,35 mm at 1:144, and of the LH2 Recirculation Line 4'' (Ø 0,7 mm).

 

The diameter of the LH2/LO2 Feedlines is 17'' (Ø 3 mm).  up040577.gif&key=37940a736477cc130c2717d

 

Yeah, those were the days of Apollo 17 ... May Gene Cernan rest in peace, forever remembered ... :hmmm:

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Hello friends,

 

at the transition of the GH2 Press. Line is still missing the oblique transition (Parts 4/5) to the Umbilical Plate, which one can see in this photo of the ET-118 (STS-115),

 

MBevT7.jpg
Source: NASA

 

which should follow now. top.gif 

 

This is a small disc Ø 2 mm x 0,3 mm for Part 5, and the slant for Part 4 is cut of an Evergreen Strip (1 mm x 1,5 mm).

 

2F9um6.jpg

 

First of all, I wanted to reinforce and file the slant by side-glued Strips 0,25 mm x 0,7 mm, as the true part widened in a funnel shape towards the top, as one can see on this image, but which would be overkill because of the "size" (see above), smiley_worship.gif which is why I decided not to.

 

up068443.jpg
Source: NASA

 

But the test fitting looks quite good, I think.

 

ReFRgB.jpg

 

When glueing such tiny parts, it depends on a precise fit, which is why you have to position them exactly and unshakeably before, what I have done here this way. 

 

e7XrwU.jpg

 

So that the parts do not grow beyond the clear height of the transition (3 mm) due to the bonding, which would happen with normal Revell adhesive, huh.gif I've glued them with MEK , which is why I've used a Teflon film, so that nothing sticks to the cutting mat.

 

6LkOVz.jpg

 

And this is the result, 

 

SaPZtp.jpg

 

and this slant could now be glued to the Cable Tray bow, which was again a tricky business. rolleyes.gif

 

t9SjUB.jpg

 

uSRjR1.jpg

 

Well, and during the tricky test fitting of this now complete LH2 Cable Tray, the mishap happened to me as the part slipped out of the tweezers and fell to the floor, whereby unfortunately, the painstaking glued slant is broken off ... erschrocken3.gif ... up043952.gif

 

So that this does not happen again after the repair, I've glued the plate with MEK onto the underside of the Umbilical Plate and centered it in place with a needle. 

 

ZlUCJw.jpg

 

And in this position, I then laid on the 'patched' Cable Tray carefully and glued onto the Crossbeam and under the Umbilical Plate.

 

cMOtbU.jpg

 

SnUbwp.jpg

 

PQlgFx.jpg

 

And so it looks like on the front of the Crossbeam, where I still have to scratch the the connection with the horizontal Cable Tray

 

qFfymc.jpg

 

for which I glue first suitable strips in the gap, what from subsequently the lower bow will be sanded.  up040577.gif

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Hello everybody,

 

sorry, but these images to the scratching the Cable Tray Bow have fallen by the wayside somewhere, so I want to add them here, which is done quickly. cool.gif

 

With these two strips I've filled in the gap,

 

nErCcM.jpg

 

then the supernatant was cut off with the Cutter chisel

 

E1meux.jpg

 

and thereafter the rounding of the bow was gently sanded.

 

xm4Rot.jpg

 

And that was it already! top.gif

 

yTDRoO.jpg

 

r7WeTP.jpg

 

And now to the already announced GH2 Press. Line incl. its TPS cladding, which runs under the leading edge of the Crossbeam, what one can see on this photo of the ET-121 (STS-114) especially well in the zoom, top.gif

 

up068663.jpg
Source: NASA

 

and also here on this photo.

 

UnpApt.jpg
Source: forum.nasaspaceflight.com (DDG40)

 

On the next photo (left) one can see the end of the TPS cladding with the exit of the Press. Line, whose bottom is rounded. Furthermore, one can see that the Cable Tray initially opens into a flat wider distributor, from whose side still a separate Cable Tray branches off into the Vertical strut in which the cables are routed to the ET/SRB Attachment, as one could already see on the LO2 Side on the opened Vertical strut. (s. Post #1745). top.gif 

 

On the right image one can see the end of this flat distributor as well as the separate branch in the vertical strut from a different perspective. The only pity is that the slant transition of the Cable Tray to the Umbilical Plate is covered by this cuff. smiley_worship.gif

 

39vIzT.jpg
Source: georgesrockets.com (George Gassaway)

 

mJdMfw.jpg
Source: NASA

 

For those who love detailing, on this matching photo of Scott Phillips one can see this branch-transition with cables laid open. speak_cool.gif

 

7vwZId.jpg
Source: Scott Phillips

 

On the following drawing, the arrangement can be seen at this point in cross section. And as one can furthermore see the previously installed Cable Tray is still attached with two holders to the outer LH2 Feedline Bracket,

up068669.jpg
Source: System Definition Handbook SLWT, Vol. II (Lockheed Martin)

 

what is also nice to see in this photo and is still on my To-do list ...up035091.gif

 

3jnebi.jpg
Source: NASA

 

And now to the TPS cladding of the GH2 Press. Line, for which I've glued an Evergreen Strip (0,25 mm x 1,5 mm) with a Semi-circular profile (0,65 mm x 1,5 mm), Which I've drilled off on both ends for the 2'' Press. Line with Ø 0,4 mm, for which I use a German silver round profile (Ø 0,4 mm).

 

x6gZsR.jpg

 

Here, the TPS cladding is already glued under the Crossbeam and the Press. Line was inserted from the LO2 Side by way of trial.

 

v68gpQ.jpg

 

And here the previous ET/Orbiter attachment sits on his place and makes a good impression.cool.gif

 

M4WGhP.jpg

 

OTKzVm.jpg

 

Next, I will try to scratch this flat and the front mounts, and then as the crowning end of this side the end of the GH2 Press. Line will be installed. up040577.gif

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I never imagined that I would look forward to the relentless stream of tiny updates as much as I do. Your determination is fantastic and I have no doubt that this magnificent model will come together piece by piece exactly as you envisage it, Manfred. We spectators will have much more to enjoy.

For the sake of your eyesight (and sanity?) I only wish you had started the whole thing from scratch in 1:72 scale; I suspect it would be twice the size but half as much work. :D

 

And who really needs a living room anyway? 

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Thanks Kirk for your nice compliments, :worthy: I'm happy for making you rave of my work. smiley250.gif

 

In the meantime my eyes are already used to some stress cant-believe-my-eyes-smiley-emoticon.gif and therefore constantly trained, as well as my brain, idea1_2.gif...  einfall.gif and that's a good thing and should hopefully stay that way ... up046595.gif

 

Scratching all in 1:72 scale would be surely an alluring challenge, smiley215.gif but then I would certainly scratch still more tiny details, eek.gif so it would be more work in the end. 

 

Room enough for that would already be in my house ... up040577.gif&key=37940a736477cc130c2717d

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Hello everybody,

 

let's go on with this crazy Cable Tray stuff, most of the details of this LH2 Umbilical with the corresponding Cable Tray are done, cool.gif but at looking closely, I've still noticed a few inconsistencies. hmmm.gif

 

But first to those missing details, which are relatively clear, like this lateral branch from the Cable Tray Distributor as well as the following arcuate transition into the Vertical Strut. This lateral branch is relatively easy and quick to lay, as it has the same dimensions (0,6 mm x 1 mm) as the Cable tray running in front of the Crossbeam. top.gif

 

xVU8oF.jpg
Source: georgesrockets.com (George Gassaway)                                      Quelle: NASA

 

But then comes with the narrow bow (red circles) into the TPS cladding of the vertical strut the trickier part. Although this is similar to the bow of the cable channel at the transition to the Umbilical plate and was filed again from the solid, for which I've used a Rectangular profile (1 mm x 1,5 mm), but this bow had to be significantly narrower, so the handling was even more difficult this time. smiley_worship.gif

 

PDyDD8.jpg

 

To fit into the narrow gap in front of the vertical strut, this bow was allowed to be only 1,5 mm wide, as can be seen here. And so the fumbling when glueing this stub was pretty stressful again ... eek.gif

 

xsGPaz.jpg

 

After several test fittings and patiently step-by-step sanding of the part, the mounting did succeed.  up045518.gif

 

Afterwards I've extended the TPS cladding (Newware) like on the other side at the upper end and finally glued this small upper mount, 

 

yNn3SS.jpg

 

2PB2vP.jpg

 

whereupon I had to take a breather first.  popcorn.gif

 

And once in the exercise, it went on with the two tiny Cable Tray mounts behind the Crossbeam, which can be seen here. 

 

3jnebi.jpg
Source: NASA

 

For the parts sitting on the cable channel (0,5 mm x 0,5 mm), which reach to the outer LH2 Feedline Bracket, I had to stick together two Strips 0,25 mm x 0,5 mm  because I currently have no strip 0,5 mm x 0,5 mm in stock. rolleyes.gif

 

4QqMkQ.jpg

 

Since these stubs had some overhang, I had to remove it subsequently, which turned out to be an extremely difficult task, as there is hardly enough room left for handling at this bizarre structure and the breakage risk was very high on top of that. omgsign.gif

 

oZlNWJ.jpg

 

So only gentle and careful sanding remained as the only solution left huh.gif which then worked reasonably well. Then I glued the lateral holders (0,25 mm x 0,5 mm), the supernatant of which was separated from below with a narrow razor blade,

 

hwAva7.jpg

 

LQhjbw.jpg

 

whereupon everything was still carefully sanded with a narrow self-made grinding stick (500 grit). speak_cool.gif

 

9JFTOX.jpg

 

hLuI9N.jpg 

 

And then it went on with the cover of the Cable Tray Distributor, which was shown in the first picture (left, below the circled branch). For this purpose, the cable channel received lateral strips of an Evergreen strip (0,25 mm x 1 mm) and a cover made of 0,1 mm Styrene, the shape of which I had to modify a bit due to the space available, as one can see here. hmmm.gif

 

UUer11.jpg

 

h2tOsc.jpg

 

sV4kD9.jpg

 

Sh2MHm.jpg

 

Finally, the missing claddings were glued at both Vertical Struts

 

HaV7SI.jpg

 

si35bM.jpg

 

whereby next, the mounting of the transition of the GH2 Press. Line will follow. up040577.gif

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Hello everybody,

 

okay, then I want to dabble as a pipe bender with the GH2 Press. Line -  The proof is in the pudding. top.gif

 

Therefore, I have put together the matching pictures once more, on which one can see the course of the line well. 

On the following photo (left) it looked for me at first as if the line behind the pipe joint slightly obliquely go up, which is not true, because the kink goes namely down, as shown in the photo (right) able to see.  up045518.gif

 

FvkNij.jpg
Source: georgesrockets.com (George Gassaway)                                          Source: NASA

 

As already mentioned, the pipe should have a diameter of 0,4 mm (2'')

 

For the first test bending I have used Copper wire (Ø 0,4 mm) because it is bendable nicely and certainly some corrections will be needed until the shape of the line is adjusted, I think. smiley215.gif  

 

And after a few fittings and slight corrections in narrowest space, the result looked like that, which is nothing to sneeze at, as I think. speak_cool.gif

 

9y9U9c.jpg

 

The two drilled holes in the Cable Tray under the Crossbeam, as well as in the Umbilical Plate proved to be advantageous for the mounting of the line, who gave a certain amount of support during threading and correction. top.gif

 

CITDVu.jpg

 

mAIsKh.jpg

 

Hopefully the Nickel silver wire will let bend a bit more exactly. But for now, I'm already very happy with the result so far. up040577.gif

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