PaperModelers.com

Go Back   PaperModelers.com > > >

Reply
 
Thread Tools Display Modes
  #1501  
Old 12-02-2017, 06:00 PM
spacerunner's Avatar
spacerunner spacerunner is offline
Member
 
Join Date: Apr 2012
Location: Filderstadt, Germany
Posts: 1,180
Total Downloaded: 2.78 MB
Thanks dear friends for your interest, I hope you stay tuned.

__________________
Greetings from Germany
Manfred
Under construction:
Launch Pad 39A with Challenger STS-6 (1:144)
Reply With Quote
  #1502  
Old 12-02-2017, 06:11 PM
elliott elliott is offline
Design Moderator
 
Join Date: Oct 2007
Posts: 7,062
Total Downloaded: 5.57 GB
Not a thread like this anywhere else that I know of so, afaik you're stuck with me sir.
__________________
This is a great hobby for the retiree - interesting, time-consuming, rewarding - and about as inexpensive a hobby as you can find.
Shamelessly stolen from a post by rockpaperscissor
Reply With Quote
  #1503  
Old 12-03-2017, 12:29 PM
spacerunner's Avatar
spacerunner spacerunner is offline
Member
 
Join Date: Apr 2012
Location: Filderstadt, Germany
Posts: 1,180
Total Downloaded: 2.78 MB
Thanks elliott for your faithful companionship.

__________________
Greetings from Germany
Manfred
Under construction:
Launch Pad 39A with Challenger STS-6 (1:144)
Reply With Quote
  #1504  
Old 12-03-2017, 02:04 PM
eagleclaw4935's Avatar
eagleclaw4935 eagleclaw4935 is offline
Member
 
Join Date: Oct 2009
Location: New bedford,MA
Posts: 586
Total Downloaded: 704.98 MB
Been here since day one.My favorite thread.
__________________
Non Sufficit Orbis-The world is not enough.
Reply With Quote
  #1505  
Old 12-03-2017, 04:11 PM
spacerunner's Avatar
spacerunner spacerunner is offline
Member
 
Join Date: Apr 2012
Location: Filderstadt, Germany
Posts: 1,180
Total Downloaded: 2.78 MB
Thanks eagleclaw4935 and to all my other true friends,

that's unbelievable, and therefore you will hereby be decorated with the STS-6 Order of Merit 1st Class.



__________________
Greetings from Germany
Manfred
Under construction:
Launch Pad 39A with Challenger STS-6 (1:144)
Reply With Quote
  #1506  
Old 12-09-2017, 06:42 PM
spacerunner's Avatar
spacerunner spacerunner is offline
Member
 
Join Date: Apr 2012
Location: Filderstadt, Germany
Posts: 1,180
Total Downloaded: 2.78 MB
Hello everybody,

in the meantime, I went to another building site again and took care of the Intertank of the External Tank (ET), which I like to have as 3D print (1:144), if I can find a modeler and manufacturer for it.


Source: NASA

Here is the 3D model by my friend Bill (niParts) from the ARC Forum, but unfortunately only in 1:72 scale,


Source: shapeways.com (niParts)

as well as here with the installation of the finished 3D-Intertank at his ET (1:72), where the part comes out great, in my opinion.


Source: arcforums.com (niart17)

And he also offers the matching mounts (Ice Frost Ramps) for the GH2 and GO2 pressure lines, also 1:72.


Source: shapeways.com (niParts)

A charming alternative to this is the Scratch building with thin Evergreen strips,


Source: raumfahrer.net (inselaner)

as it was successfully and impressively had been realized by my friend (inselaner) in the Raumcon forum at the ET of his Airfix Shuttle Stack.


Source: raumfahrer.net (inselaner)

So far, I have also flirted with the idea of this scratch-building variant, in case I can not find a suitable 3D-print.
In the Airfix kit, the Intertank stringers are only hinted at by these boring decals and are therefore only 2D, which I can not make friends with.



So I'm still trying to get a 3D Intertank (1:144), with that Michael Key (The Aerospace Place) had been starting in a hopeful way,


Source: Shapeways.com (The Aerospace Place - Michael Key)

on whose update I'm still waiting.

That's why I've been more in-depth with the Stringers, if I have to scratch them myself, which I did not intend to do.


Source: NASA
__________________
Greetings from Germany
Manfred
Under construction:
Launch Pad 39A with Challenger STS-6 (1:144)
Reply With Quote
  #1507  
Old 12-09-2017, 06:43 PM
spacerunner's Avatar
spacerunner spacerunner is offline
Member
 
Join Date: Apr 2012
Location: Filderstadt, Germany
Posts: 1,180
Total Downloaded: 2.78 MB
So far, unfortunately, I had no dimensions of the stringers, but rather I have always tried to estimate it myself. At first, these images helped me, where cracks in the insulating foam on the Intertank before the STS-133 had been investigated,


Source: NASA

which were caused by a broken stringer, which can be seen here. And thus the height of the stringers should be about 2.5''.


Source: NASA

From another image of this study after the repair of this stringer area, then I have determinedthe 1:144 widths of the Stringer (0.3 mm) and the Valleys (0.65 mm), which would be a good basis for scratch building.


Source: NASA

So far so good, but then I've actually found even more detailed information about stringer geometry in another NASA document (ntrs.nasa.gov),


Source: NASA

with which I made this sketch (1:1), which was then supplemented by the 1'' thick foam insulation (red),



And these dimensions with foam insulation could now, if one would like, be taken as a basis for scratch building, which is summarized here again.


Source: NASA

But I still hope that Michael Key keeps on the line. At first he wanted to know the diameter and the exact position of the LO2-Feed Line as well as the Forward SRB Attachment Point) in the Intertank, what I still have to determine.


Source: NASA

__________________
Greetings from Germany
Manfred
Under construction:
Launch Pad 39A with Challenger STS-6 (1:144)

Last edited by spacerunner; 12-11-2017 at 07:04 PM.
Reply With Quote
  #1508  
Old 12-09-2017, 08:45 PM
elliott elliott is offline
Design Moderator
 
Join Date: Oct 2007
Posts: 7,062
Total Downloaded: 5.57 GB
So are you thinking scratchbuild over readymade then Manfred? Looks like you have sufficient detailed information for the interstage tank at least. Do you know if strips of the correct dimensions are available commercially? If you do decide to scratchbuild I have every confidence in your ability to pull it off.
__________________
This is a great hobby for the retiree - interesting, time-consuming, rewarding - and about as inexpensive a hobby as you can find.
Shamelessly stolen from a post by rockpaperscissor
Reply With Quote
  #1509  
Old 12-11-2017, 02:33 AM
spacerunner's Avatar
spacerunner spacerunner is offline
Member
 
Join Date: Apr 2012
Location: Filderstadt, Germany
Posts: 1,180
Total Downloaded: 2.78 MB
Thanks elliott for your nice compliments,
the Scratch variant with Evergreen strips, I'll initially keep in the hindquarters.

BTW, for the close-fitting stringers in the area of the two thrust panels, my friend Jrg used Evergreen strips 0.4x0.5 mm, and for the remaining area 0.4x0.75 mm.
The actual trapezoidal shape of the stringers can be safely ignored at this scale (1:144).

__________________
Greetings from Germany
Manfred
Under construction:
Launch Pad 39A with Challenger STS-6 (1:144)
Reply With Quote
  #1510  
Old 12-11-2017, 06:45 PM
spacerunner's Avatar
spacerunner spacerunner is offline
Member
 
Join Date: Apr 2012
Location: Filderstadt, Germany
Posts: 1,180
Total Downloaded: 2.78 MB
Hello everyone,

and my hope was not disappointed. Yesterday Michael Key came up with a new update in which he took into account some of my correction hints.

On the one hand, it has reduced his previous, somewhat too large number of stringer in the two Thrust Panel to 26, as well as the perpendicularly extending circumferential segment rings somewhat narrower made, which looks much better.


Source: Shapeways.com (The Aerospace Place - Michael Key)

And on the other hand, he has adapted the geometry of the front and rear transitions from the Intertank to the ET better to the original.


Source: NASA

as you can see here, all respect.


Source: Shapeways.com (The Aerospace Place - Michael Key)

In order to be able to continue modeling, he now needs the exact location of the SRB Forward Attachment Points, as well as the location of the LO2 Feedline ( 17'') and of the GO2 and GH2 Pressure Lines ( 2'') , shown in this drawing.


Source: Lockheed Martin (System Definition Handbook SLWT - Vol. II)
The only question is whether or how well the details of the Shuttle Stack from the Airfix Kit match this original drawing, or not.

In order to be able to check these details on the shuttle stack, I had to disassemble my previously provisionally taped Test-stack and then to attach the kit supports at the SRB on the ET-Attachment Ring to determine the exact position of the coupling point on the Intertank.





With the glued supports, the location of the SRB on the ET was now fixed exactly,



and could be marked again.



After that, I was amazed that my border of the front SRB docking pad, previously marked with tape on the test stack, was sitting actually a bit too deep, which could now be corrected.






Then I still determined the location of the LO2 feedline on the Intertank and was pleasantly surprised that the angle of 23 matches with the value in the above drawing.



However, what is less consistent with the original is the spartan version of the feedline itself and the lack of coverage (Fairing).


Source: NASA

This has been realized much better by Revell on their ET-Intertank, as you can see here at the ET of my recently unexpectedly deceased friend Thomas from Bavaria, whose Real Space Modeling estate was taken over by me.




In view of this, after careful consideration and in coordination with his wife and son, I have come to the conclusion that it would be also in his sense to at least partly preserve his model-building heritage, when I would integrate some of his assemblies and parts, e.g. the already LED illuminated FSS platforms and the Hammerhead Crane as well as the PE staircases for the tower, etc. into my model and would thus be able to document and honor his awesome modeling work and skills for everyone visibly posthumously. - May he rest in peace ...

And here finally the distance of the coupling point for Michael Key, which lies approximately in the middle.



At this point, a continuous inner tube is foreseen into which I will later insert a brass rod ( 2 mm) to stabilize the SRBs.


Source: Shapeways.com (The Aerospace Place - Michael Key)

__________________
Greetings from Germany
Manfred
Under construction:
Launch Pad 39A with Challenger STS-6 (1:144)
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 05:22 PM.


Powered by vBulletin®
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Resources saved on this page: MySQL 8.70%
Parts of this site powered by vBulletin Mods & Addons from DragonByte Technologies Ltd. (Details)
Copyright © 2007-17, Paper Modelers.com