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00:41:54
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Transcription: [00:36:16]


{SPEAKER name="Karl Heimberg"}

He went into the air raid shelter, and the air raid ditch with his family and all four were killed.

{SPEAKER name="Michael Neufeld"}

Yeah that's, it's a real tragedy.

[00:36:25]

Okay, and Heuter finally was, you got along with him very well?

{SPEAKER name="Karl Heimberg"}

I got along with him very well, right.

{SPEAKER name="Michael Neufeld"}

What was his background?

[00:36:39]

{SPEAKER name="Karl Heimberg"}

He wa- he was an engineer, so he came from a technical school right and er. So the two of us never had a problem there. [LAUGHS]

{SPEAKER name="Michael Neufeld"}

Mmhmm.

[00:36:57]

{SPEAKER name="Karl Heimberg"}

You know, constantly some project came up that had to be resolved and er mainly with a mass production then, which we had to resolve.

{SPEAKER name="Michael Neufeld"}

Mmhm.

[00:37:13]

So your job then was you were in Heuters office and it was, constantly you were getting documentation, meetings, whatever, regarding, regarding a problem of putting the engine into production.

{SPEAKER name="Karl Heimberg"}

Yeah, right.

[00:37:31]

{SPEAKER name="Michael Neufeld"}

In 1940, Mostly in 44,

{SPEAKER name="Karl Heimberg"}

44 right.

{SPEAKER name="Michael Neufeld"}

So your job on a daily basis was you know. Well, maybe I should ask you that question. I mean what, what did that mean on a daily
basis for you?

[00:37:50]

{SPEAKER name="Karl Heimberg"}

You know there came problems where I worked for a week for two weeks, for four weeks, there were problems, where I worked 24 hours.

[00:37:59]

{SPEAKER name="Michael Neufeld"}

Mmhmm. Would that mean changing design components or material shortages or?

[00:38:09]

{SPEAKER name="Karl Heimberg"}

That came. Material shortages came in too, you know, during the war. All of a sudden the steel plant was bombed out and could not deliver the steel anymore and you came to, a different material and a different material in the combustion chamber, for example, showed we have difficulty here. We have to change the cooling system a little bit because the combustion chamber burnt out. Because the heat conductivity of the material was different than the material before.

[00:38:42]

{SPEAKER name="Michael Neufeld"}
Mmhmm.

{SPEAKER name="Karl Heimberg"}

So this was for example one problem. Okay lets go at it. We had shops at Peenemunde. You could say we have them to turn a different hole pattern into the combustion chambers, you know, we had these 18 pods and since we had these 18 pods we had zones and when we had too hot a zone, we simply drilled

[00:39:13]
a hole under into, into the combustion chamber and from the outside we had these rings. With fuel and we put liquid fuel into the combustion chamber to cool that spot.

{SPEAKER name="Michael Neufeld"}
Right.

[00:39:28]

Film cooling

{SPEAKER name="Karl Heimberg"}

Film cooling -- Right, right

{SPEAKER name="Michael Neufeld"}

Along the wall. Erm

{SPEAKER name="Karl Heimberg"}

So that was just one example.

{SPEAKER name="Michael Neufeld"}

So you would have to specify a different arrangement of holes for film cooling was that?

[00:39:46]

{SPEAKER name="Karl Heimberg"}

Well we did not specify it. We went right away to the test stand and corrected it onto test stand.

{SPEAKER name="Michael Neufeld"}

Mhmm. Okay so the you would erm you would get a problem like that and you would say okay.

{SPEAKER name="Karl Heimberg"}

Go to test stand number eight, and work with the people of test stand number eight. We drill a hole here, we drill a hole here.

[00:40:08]

{SPEAKER name="Karl Heimberg"}

Now lets try it.

{SPEAKER name="Michael Neufeld"}

But would you have the material for example? Your example, you had to change the quality of steel or something that you used in the thing. Would you immediately have the material in which to test--

{SPEAKER name="Karl Heimberg"}

No

{SPEAKER name="Michael Neufeld"}

What the alternative was?

{SPEAKER name="Karl Heimberg"}

No, the only way was, okay how can we correct that.

[00:40:29]

You are right normally you would say, we would go back and would go to the steel plant but there you would have difficulties already with the material and therefore you, tried to solve the problem not as you normally do. You go to the source but you solve it, you solve the final the final product,

[00:41:01]

because if you go to the source it takes by far too long, until you come to it and beside that you are already in the manufacturing process. You did not want to hold that up.

{SPEAKER name="Michael Neufeld"}

[00:41:11]

Mhmm. So you just tried to experiment with the materials until you said this works.

{SPEAKER name="Karl Heimberg"}

Yeah

{SPEAKER name="Michael Neufeld"}

Send this down to Mittelwerk with these new specifications. I'm working with this material.

{SPEAKER name="Karl Heimberg"}

Yes, that's right.

{SPEAKER name="Michael Neufeld"}

After--

[00:41:29]

{SPEAKER name="Karl Heimberg"}

You'd change the drawing, send it to the Mittelwerk. This is how the combustion chamber should look like.
the
[00:41:33]

{SPEAKER name="Michael Neufeld"}

So it was a constant er constantly struggling to produce new production drawings

{SPEAKER name="Karl Heimberg"}

Yeah

{SPEAKER name="Michael Neufeld"}

er, of modified parts-

{SPEAKER name="Karl Heimberg"}

--Let me say, not to produce new drawings but to correct the drawings according to new results which--
[00:41:55]