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Conversions and Scratch Builds
165thspc
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Kentucky, United States
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Posted: Friday, February 22, 2019 - 03:29 AM UTC
Great find Robert!

I take it the tires were removed by locals rather then being burnt out during an attack. Both the tires and their rims are missing which would not be the case in a fire.

As some may not realize, the wheel hub stays with the vehicle. This is also the case with the majority of the Axis halftracks. (Other than the little Sd. Kfz. 10.)
SpeedyJ
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Posted: Friday, February 22, 2019 - 04:03 AM UTC
I'm looking for the counterpart in this survey I found on the net and I found it. This trailer is a complete different one from the first 2. Already did some research on that one and it seems to be an early '30 platform form the Luftwaffe? Correct me if I'm wrong, but totally different.
Pictures comes from the Wiki Encyclopedia.



Now look at this...



Looks very different.
Also took a look at towing the Takom 16 tons Strabo Fries Kran. I will open a thread on that soon, because it is a beautiful kit and want that.

Kind regards,

Robert Jan

SpeedyJ
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Posted: Friday, February 22, 2019 - 04:21 AM UTC
Only for inspiration gentlemen...
Watch the line up



Have a nice weekend all of you,

Kind regards,

Robert Jan
ayovtshev
#490
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Sofiya, Bulgaria
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Posted: Friday, February 22, 2019 - 04:43 AM UTC
Thanks Greg!
And thanks, Robert!

I have the Wuerzburg from Amusing Hobby-split the combo-kit with Kalin(k_mero4) he took the gun.The Wuerzburg is on my to-do list and I plan to do it on a trailer.

Now about the trailer of Wuerzburg-the early versions were rigidly mounted on a trailer like the one you posted.
I am not aware whether this is a Luftwaffe trailer, but similar(in appearance) trailers were also used for the RRH's Germany exported in late 1930's(Bulgaria and Romania).
Bulgarian:
Romanian:
RRH abandoned in Yugoslavia:

Off course the Wuerzburg was heavier than the RRH, so the trailer that carried it had a stiffer construction.

I still have to decide on what type of trailer I'll mount my Wuerzburg and I am looking for refferencies.

In 1941 4 sets of Wuerzburgs (and Freyas) were deployed on Bulgarian soil(one of the locations is less than 1 km. from where I live in Sofia).These sets were operated by German staff for the Luftwaffe. In late 1943 the sets were transferred under Bulgarian command and operation.Operators training was done by German instructors.
When Bulgaria switched sides(September 5th 1944), all sets were put out of action by the German instructors, but were not evacuated with the retreating German troops.It took almost an year till they were repaired and put to action again.
So maybe these were stationary sets?Or the Germans simply didn't bother to transport them on the bad Balkan roads.

I'll see what I can find

:-H
SpeedyJ
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Posted: Friday, February 22, 2019 - 04:57 AM UTC
Great pictures so far and we are taking about the same kit
Will have to search in the Henry Hoppe & Friends Archives. Look at this Forum also, maybe you know it.
This got me occupied as from last Sunday. An amount of pictures and links, most is dedicated to the year 1945, retreat of Germans form the Sudetenland. https://www.modelforum.cz/viewtopic.php?f=79&t=8080&sid=0e73df2d20324b8d9b40b92081762e97.
When you find the Phänomen with the special aufbau, just say boe!
I love it.

Kind regards,

Robert Jan
ayovtshev
#490
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Sofiya, Bulgaria
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Posted: Monday, February 25, 2019 - 09:46 PM UTC
Thanks for the link, Robert!
Lot of nice finds there

The trailer, that was initially used for the Wuerzburg, is the Anhängerfahrgestell A2: http://www.kfzderwehrmacht.de/Hauptseite_deutsch/Anhanger/2-achsige_Anhanger/FuSE_62/fuse_62.html

Later models (like the one you posted earlier-with tires removed) were mounted on Sd.Anh.104.

On a side note- Germany and its allies were all short of natural rubber, so tires were always in high demand and short supply.
At one instance back then, to buy tires from Germany for Army's vehicles, Bulgaria was asked to ship enough natural rubber(20 tonnes) for their production, which my country did.

I also found a great source for trailers to be the Photothread: German trailers in Axis History Forum:
https://forum.axishistory.com/viewtopic.php?f=132&t=161260&sid=0de70dc04dbb8727e799760e7c2410b5

Thousand of pictures-among them real jewels(like trailers, turned upside down in road ditches with all elements of frame construction exposed).


SpeedyJ
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Posted: Monday, February 25, 2019 - 10:48 PM UTC
Hi Angel. That's a real goldmine of reference, very useful.
Thanks for sharing.

Kind regards,

Robert Jan
Frenchy
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Posted: Tuesday, February 26, 2019 - 12:12 AM UTC
The Axishistory forum is one of the best reference pics online sources for Axis-related stuff (to me at least )

H.P.
SpeedyJ
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Posted: Tuesday, February 26, 2019 - 02:00 AM UTC
Been aware of that, but never dived into. Great pictures.
Next 66 pages to view this evening.

Kind regards,

Robert Jan
ayovtshev
#490
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Sofiya, Bulgaria
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Posted: Tuesday, February 26, 2019 - 06:38 AM UTC
I'm sure you'll come back to that thread very often,Robert.
Don't ask me how do I know...

In the meantime I've been slowly building my RRH.

I've done both carrying arms and mounted the listening ears.


Detailed the front and back side,built the deflection "computer".


Added the handwheels for height and azimuth operators.
Soldered their seating supports-need to add two more seats(a build of their own...):


Built the seating support for the deflection operator.


I'll need to build the base of the RRH again- the one I have built 2 years ago is too narrow. But I'll leave that for later.

Next I'll finish the sides of the RRH.


165thspc
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Posted: Tuesday, February 26, 2019 - 07:47 AM UTC
Angel - construction work almost beyond belief!

I wonder what/how the deflection computer was used?

I assume the operator would input wind direction and wind speed to compute deflection.

I would think it would require two listening posts some miles apart to determine the course/speed/location of an enemy flight.
k_mero4
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Posted: Tuesday, February 26, 2019 - 08:10 AM UTC
O, Bace!
I see we already have seats.
I wonder how you will make the headphones.
Congratulations.
Kalin
ayovtshev
#490
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Sofiya, Bulgaria
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Posted: Tuesday, February 26, 2019 - 09:02 AM UTC
Thanks Mike!

The deflection computer(Verzugsrechner) continuosly adjusted the coordinates of a "heared" target with regard to the speed of sound and set target speed.

The RRH gave neither altitude nor speed of the target,therefor it was not used to direct AA gun fire(except when those FlaK's were firing to form a "denial" area).

To the best of my knowledge- the deflection man set the expected speed of the target and -when both listening ears operators reported "Target in the middle"-transfered the adjusted data to the projector.

Thanks Kalin!
You'll see soon

petbat
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Posted: Tuesday, February 26, 2019 - 08:42 PM UTC
Okay on the home stretch Angel.... well maybe not... very impressive.
ayovtshev
#490
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Sofiya, Bulgaria
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Posted: Tuesday, February 26, 2019 - 09:10 PM UTC
Thanks Peter!

Pretty long home stretch-if I may add...
Let's hope the stallion won't meet the sticky end

165thspc
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Posted: Tuesday, February 26, 2019 - 09:26 PM UTC
Angel - how in the world did you cut out the seat base?

What we might call here in the US "the tractor seat"?

You have built those seats in scale metal just exactly how they would be built in full size! (Insert open mouthed exclamation here!)
165thspc
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Posted: Tuesday, February 26, 2019 - 09:34 PM UTC
As a source for small diameter metal rings consider that some cheap "click" retractable pens have the upper and lower portions of the plastic pen separated by a decorative chrome metal ring. You can often remove the ring, then screw the pen back together and it will still function just fine.

These are usually about 1.5mm in diameter and .1 to .5mm thick. I always wanted to find the manufacturing source for these metal rings and order about a hundred all at one time.
ayovtshev
#490
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Posted: Tuesday, February 26, 2019 - 10:40 PM UTC
Thanks Mike!

Here is how I did the tractor seat:
1.I use 0,1 mm copper sheet(sourced almost 2 years ago on evilbay),that I soften by burnishing.
2.I measured the seat of my modelling room chair and transfered the sizes in 1/35th
3.Then I cut 0,3 mm styrene master to the shape of the seat
4.Marked and drilled all openings on the master
5.Transferred the master on the copper sheet, marked all openings.
6.Using my RP Toolz punch and die set I punched the holes in the copper sheet(using 1 mm punch for the outside and 0,7 mm punch for the inside holes).
7.Took my Excel burnisher tip and started burnishing the seat.
8.Once I got the curvatures,using my Italery pliers I bent down the rim of the seat.Flipped the seat around and using the finest tip burnisher I made several passes in the groove of the rim.
9. Then using my PE scissors I cut the excess between the holes and sanded the openings.
10.Sanded the whole seat with fine grit sanding paper.

All my tools-and master-involved:


As I said yesterday-a build of its own

HTH
ayovtshev
#490
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Sofiya, Bulgaria
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Posted: Tuesday, February 26, 2019 - 11:06 PM UTC

Quoted Text

As a source for small diameter metal rings consider that some cheap "click" retractable pens have the upper and lower portions of the plastic pen separated by a decorative chrome metal ring. You can often remove the ring, then screw the pen back together and it will still function just fine.

These are usually about 1.5mm in diameter and .1 to .5mm thick. I always wanted to find the manufacturing source for these metal rings and order about a hundred all at one time.



The retractable pens I use(0,5 and 0,7 mm) are not that slim and are lacking the decorative metal ring.

But I often use the slim metal tube that accomodates the graphit core as a stamping tool, when I need to model tiny round recesses on styrene(like bolt heads that are almost flush with the surface).
What I usualy do is-I remove the graphit core, apply some Tamiya Extra Thin cement on the styrene, wait a bit and then press with the empty tip of the pen on it.
Two examples:
Casting recesses on a Henshel 33D1 truck engine(I used 0,5 mm pen):

Cut bolts on a removed Pz.IV applique armour(0,7 pen used):


HTH

165thspc
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Posted: Tuesday, February 26, 2019 - 11:14 PM UTC
I am still a little fizzy on how you make those tapered cutouts in the tractor seal but I love your method for making the sunken bolt heads and small cupped depressions!
petbat
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Posted: Tuesday, February 26, 2019 - 11:59 PM UTC

Quoted Text

I am still a little fizzy on how you make those tapered cutouts in the tractor seal but I love your method for making the sunken bolt heads and small cupped depressions!



Drill the outer and inner series of holes, which are the top and bottom of the tear drops. Then cut out the part between the paired holes with PE Cutters so the straight cut is at a tangent from the side of the larger hole to the side of the smaller hole. Do both sides to form the sides of the teardrop.



Or just cast up one of Tamiya's from their Marder III kit!
165thspc
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Posted: Wednesday, February 27, 2019 - 12:43 AM UTC
Just so you know - (and no offense intended.)

I do have the basic concept but can't help wondering how/why the PE cutter doesn't totally deform the seat blank as you attempt to connect the holes.

It almost seems like it would require a tiny dental drill/burr/cutoff wheel to accomplish that.

Something much smaller than my Dremel.

(But obviously Angel has the hang of doing it!)
ayovtshev
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Sofiya, Bulgaria
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Posted: Wednesday, February 27, 2019 - 01:50 AM UTC
Mike,

To cut I flip the seat and cut from beneath.Thus the cut comes in the doomed(not the concave) part of the seat and deformation is minimal.

Yet the cutouts are not perfect.
Mainly because the PE scissor has a -albeit elongated, but still-triangular crossection, that fits when cutting from the wider hole to the narrower, but not vice versa.

I'll try slicing the cutt outs with an Excel #24 deburring blade and will report soon.

SpeedyJ
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Posted: Wednesday, February 27, 2019 - 01:54 AM UTC
Angel uses Blacksmith techniques, pounding the metal little by little, step by step and it forms the shape you desire, Ting Ting Ting, Ping Ping Ping.
Hats off for that seat!

Kind regards,

Robert Jan
ayovtshev
#490
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Sofiya, Bulgaria
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Posted: Wednesday, February 27, 2019 - 02:03 AM UTC

Quoted Text

...
I still have to decide on what type of trailer I'll mount my Wuerzburg and I am looking for refferencies...
I'll see what I can find

:-H



Robert,

I found the refference- a picture of one of the 4 Bulgarian Wuerzburgs:


In the lower left corner one can clearly see the fender and elements of the winch of Sd.Anh.104

So I'll do my Wuerzburg in this variant.
Some day...