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Real Spacecraft
Discuss actual spacecraft either past, present or future (prototypes).
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Aggregat 4--- V-2
Thorst
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Posted: Sunday, November 29, 2009 - 10:19 AM UTC
Hello,
this will be a description of my work-in-progress on a series of scratchbuilt A-4/V-2- missiles. I want to do several of them in various colours, from the first flight sheme over the military sheme to american rockets after WWII, for example a Bumper. My intention is to start a series of space launcher models, so the forum "Real Space" should be the right place for it.
Scale is 1/48, when finished it will be a combined vacu- and resinkit to ease making all the versions.

My drawings are based on original plans and were drawn in a 2D-Cad. They are not finished yet.

The first parts for a testbuilt have been finished this evening. I wanted to depict the ribbled surface of the body and the fins, and I'm very happy with the latest results, I'll not change this from now on.

I do not have a lot of time to build, so pleas excuse if the next update will require some weeks.

Next are small resin-bits for structural strength of the model and the Instrument section.




The mold for one fourth of the tail



The mold for one half of the body



The first stack of the parts


Cheers,
Thorsten
Gorizont
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Posted: Sunday, November 29, 2009 - 10:36 AM UTC
Nice to see your build-log here!
I also have updated some minutes ago.

Your model looks really good on the photos!
(more by mail)

greetings...
Thorst
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Posted: Sunday, November 29, 2009 - 10:40 AM UTC
Hi,

this was the fastest reply I've ever seen!

Thanks!

alpha_tango
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Posted: Sunday, November 29, 2009 - 07:34 PM UTC
Hi Thorsten

welcome aboard and it is very nice you build in 1/48 scale ... which is "MY" scale

Your A4 looks very nice so far! )not sure if it has to be written with dash or not .. .German aircraft are not witten with it, so I leave it out here)

viele Grüße aus BW

Steffen
Thorst
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Posted: Monday, November 30, 2009 - 08:34 AM UTC
Thanks Steffen!

Well I built in 1/72 first, but since a good friend showed me his bigger 1/48 planes I decided to start that scale, too, I think it's a good compromise between details and size, the Saturn V, which would be the biggest on my list, would be around two meters...

I think you are right, A4 without a dash... sorry.

BTW, I started an Academy F-22 in spring, too, but I didn't finish more than the cockpit yet... there are so many mistakes which I want to correct on the model...

Schöne Grüße aus Franken!

Thorsten
alpha_tango
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Posted: Monday, November 30, 2009 - 08:46 AM UTC
Hi Thosten

will you make a kit from your scratch build? .. just curious.

My F-22A is on hold at the moment as I wanted to make it easy and close most things up .. which turned out to be harder than leaving all bays open .. rats .. one day though. I did not care too much about mistakes on this one as jets are just a diversion from my main area of interest which is WW2 (namely Luftwaffe)

I already thought about it yesterday, but I am still not sure: I think the V-Waffen were Wehrmacht or even SS. Do you know for sure?

all the best

Steffen
Thorst
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Posted: Monday, November 30, 2009 - 09:22 AM UTC
Steffen,

yes, I will make a "kit" if everything turns out well, mostly for my own, but also one for a friend and one for my father. I also made the "kit" of the Venera-Probe that Soeren bilds in the moment...

To your question with the V-2: As far as I know the Wehrmacht was the appropriate organisation for firing the missiles, but with the help of civilians who measured out the launch sites before the rockets and equipments came. You can read about the procedure in the original handbook, the "A4-Fibel", downloadable at http://www.aggregat4.de. There you can find the Geraetebeschreibung, a more technical description, too.
The SS was involved in the development and productionof the weapon as far as I know.

Cheers,
Thorsten
Thorst
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Posted: Friday, January 01, 2010 - 02:39 AM UTC
Hello,
here is a small update of what happened the last weeks:

I was in the German Museum in München to improve my references. I was able to take some photos of areas of which I had no good pictures before and to measure some length on the fin-section and on the launch platform.
This visit was very succesful, with the new information I could finish my drawings. Unfortunately in the first version of them I misinteprated one length, so I have to rebuild the complete tail-section.
This time I'll do it another way, the fins seperately from the body, and making masters for resin-pieces of it, the final parts won't be vacu-formed pieces any more, this will ease the building process.

Here is a low-quality version of the drawing:



Thorsten
Gorizont
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Posted: Tuesday, January 05, 2010 - 10:01 PM UTC
Hi Thorsten, thank you for the update.
I also think, it´s easier to glue the fins to the body, than glueing the vacu-formed parts together.
But we will see, how you make this and how it will look later.

greetings...
Thorst
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Posted: Sunday, January 10, 2010 - 09:41 AM UTC
A short update:

I started the masters for the new fins.
They will be built from a styrene structure and then covered with aluminium foil.
This will be two parts, two opposite fins on one part; when building, they will be plugged together and give the right 90°-angle between them. The bottom part of the rocket body will be devided into four pieces, they will slide into the "cross" of the fins. These parts will be the next after the fins.
There will be also a three-piece-nozzle, with the injectors in the inside of the thrust chamber.

I'm also tending to make the whole "kit" in resin, which will be a bit more expensive but much more easy to built... and I plan to do some of them.

The next update will hopefully include some pictures.

Cheers,
Thorsten
Thorst
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Posted: Monday, January 25, 2010 - 09:28 AM UTC
Time for a new update:

The structures of the fins are now complete.
The two main parts:


Plugged together:


They are now waiting for the coverings. I try to make them from thicker aluminium foil.
At the first test I tried to represent all rivets, I made drawings therefore with the help of photos from my trip to Munic, printed them in 1/48, glued them onto the foil and pierced through them with a thin needle. Unfortunately the rows were not exactly straight, so I tried it once more, without rivets, only the wobbly aluminium foil itself.
It didn't look correct.
Now I'm trying it once more with rivets (and use a ruler ;-) ), it looks nice so far. Pictures will come when it's done.

Cheers,
Thorsten
Gorizont
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Posted: Monday, January 25, 2010 - 10:50 AM UTC
That looks very good so far!
Would be interesting, how it looks with the foil on it... and then, the results made of resin.
That seems to be a good technique, making the rivets with the aluminium foil!

greetings...

PS: My V.10 antenna was glued and I repainted some parts.
Thorst
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Posted: Wednesday, January 27, 2010 - 08:53 AM UTC
I made some progress with the coverings.

The third trial, with indicaations of rivets and the wobbly structure, was satisfying for me, the rivet-lines are now straight (the photos show some confusing reflections though, sorry):



I used the printed paper-sheets for correct alignment, and used a ruler to pierce them into the foil.
Then the part was cut out and slightly pressed on a representation of the structure made from cardstock, that gave the part the ripples like seen on reference photos.

The next picture shows those "tools":



Cheers,
Thorsten
Thorst
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Posted: Monday, March 22, 2010 - 08:37 AM UTC
A small update:
Last weekend I was in the german Museum once more to verify some measurements and took some more photos. As far as I can say, my drawings are correct now.
Now I'm working on the drawings of the launch platform, got some more measurements there too.
I hope I'm able to post some results here in the next weeks. The project isn't dead! ;-)


Thorsten

EDIT: The first one should be the "Frau im Mond", the first successfully flown A4. I have only two photos of this rocket, and I'd like to know if there are more than those. I've questions about the Paint sheme, and some details. This particular rocket had some changes from the serial production variant, and I try to catch them as good as I can. I'd be glad if anyone could help me with some references!
Thorst
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Posted: Thursday, March 25, 2010 - 01:04 AM UTC
Finally two photos:

here's the new designed structure for the tail section, made from cardboard:


It has now the right diameters, proven by a measurement at the original at the german museum.

I also started the combustion chamber and nozzle, structures for the three parts can be seen behind the tail, and in this picture, put together:


Unfortunately I don't have the possibility to turn the parts on a lathe, so I have to fill the gaps between the circles with some kind of modelling clay and sand it down to the right shape. Then sheet plastik will be heatformed over them, like you see on the first pictures of this thread.

Cheers, Thorsten
Thorst
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Posted: Tuesday, March 30, 2010 - 08:42 AM UTC
Another update:
This weekend I finished the molds for the masters of the combustion chamber and nozzle.
Here you can see the three parts:


and put together:


it needs some more cleaning, but this method for making parts with rotation symmetry works very well.

Here's another picture of the nozzle, next to a model of Robert Goddart's first liquid fueled rocket in the same scale:


And the mold for the new tail is also in progress:


Cheers,
Thorsten
Thorst
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Posted: Friday, April 02, 2010 - 11:25 PM UTC
Yesterday the kitchen was mine, so I had the opportunity to "vacu-form" some parts:
The body for the new tail came out great, but it looks unspectacular, so I took no photo yet.
The parts for the "Ofen" (the combustion camber) didn't want to become perfect, but after 5 trials I got some useful parts:


The next days I have to detail them, then I'll do the next update.

And comments are welcome

Cheers, Thorsten
Gorizont
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Posted: Saturday, April 03, 2010 - 01:52 AM UTC
Looks interesting so far!
Perhaps this page can help you for the further progress of the engine.
http://www.zamandayolculuk.com/cetinbal/v2raketedie.htm

greetings...
Removed by original poster on 04/05/10 - 21:10:53 (GMT).
Thorst
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Posted: Monday, April 05, 2010 - 10:12 AM UTC
Sören, thank you for this link! I didn't know from this site yet.

I'm still on detailing the Ofen, the main work on it is done now, it needs some cleaning, then I've to add some more struts and the interiours of the injection valves (they are all visible through the nozzle).
Here's a picture of the heatformed parts for the outsides of the injection valve houses:


And here all parts together:


My plan is to finish it the next weekend,and it'll be a nice piece on it's own! Hopefully resin casting will work on it...
BTW, I remember a photo which shows an american soldier examining V-2 combustion chambers, in front of the entrance of the Mittelbau Dora-factory. I can't find it any more but think it'll be a nice diorama, so could anybody tell me where to find it or send me a scan of it?

Cheers,
Thorsten
Thorst
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Posted: Monday, April 12, 2010 - 07:18 AM UTC
Hello,
I made some progress agein on the Ofen. The three parts are almost finished, some small details are still missing, but I sprayed it grey today to see where it needs some more sanding and cleaning.
The result till now can be seen here:


The interiour is also detailed, the oxigen injection valves are done from 1mm plastic rod, sanded to a round shape:


They are all visible through the nozzle:


It takes a little more time than I thought, but the piece is worth the work.

Cheers, Thorsten
Gorizont
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Posted: Tuesday, April 13, 2010 - 06:54 AM UTC
Wow, great work... as always!
This looks very similar to the pictures, I found some days ago!
Showing the engine alone on a trailer or "special car" seems to be a good scene!

greetings....
Thorst
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Posted: Tuesday, April 13, 2010 - 07:07 AM UTC
Thank you!
Yes, the engines were transported on small platforms, I'd like to buid a small diorama showing this, but I think one or two engines would not be enough, it would need an "eyecatcher"... I once more looked through all my books, but unfortunately I can't find this very picture with the soldier... Probably someone else knows what photo I mean?
Gorizont
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Posted: Tuesday, April 13, 2010 - 07:39 AM UTC
Perhaps this:

http://www.v2rocket.com/start/makeup/infopic12.jpg
from "v2rocket.com""

In this picture, he is not a soldier. But perhaps this could help.

greetings...

edit: I have removed the image - I left only the link.
Thorst
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Posted: Tuesday, April 13, 2010 - 07:49 AM UTC
Well, the one I look for was- as I recall correctly- taken in front of Mittelbau Dora, something like that:
http://www.v2rocket.com/start/chapters/mit011.jpg

But thank you!