10M E.Messer and battery

[Sturm78]

Thank you very much, ludvig.

Regards Sturm78

[wimve]

Hello all,

I have some additional questions about this 10m "Entfernungsmesser" :
- if the pictures all show a 10.4 E.messer, why do some have two and others four optics ?
- is the position of the periscope, interchangeable from left to right ?
- is the manhole, always facing the enemy side ?
- what is the purpose of the two "rails" around half of the circumcise of the dome ?

I do ask because the pictures show these things not allways the same. Also I am drawing a 3D model of the one on the "Leitstand" of Hanstholm.

Efm_105_4.jpg (154.46 KiB) Viewed 2042 times

[20P7]

Hello Wim and others,

I will try to answer some of your questions with the help of the british intelligence report No. 182 called "German Coast artillery equipment employed in the defence of the west coast of denmark. Appendix A of this report deals with the 10.5 m base monostatic rangefinder - the item your are talking about here. There it is written:

The rangefinder tube contains four instruments:

1 A stereoscopic rangefinder of 10,5 m base.

2 A stereoscopic spotting telescope of 11 m base.

3 A stereoscopic laying telescope of 6 m base.

4 A stereoscope training telescope of 6 m base

This description of the instruments in the rangefinder tube would fit with the images of the Seydlitzhaube and also maybe with the image of the Zeisshaube where the openings for the optics are closed by some cover. As some of the rangefinders on the pictures do have only the outer optics, it seems that there was a choice to install the inner ones (laying telescope and training telescope could). As the report is about the danish part of the AW, I guess the rangefinder that was described within the report was the one of MKB Hansted II. On the image placed in the report this one looks very much like a Seydlitz Haube.

The manhole does not always face the enemy direction, for example it was placed to the rear on the Zeisshaube of the S 446 of MKB 4/507 Örlandet.

Regards

Daniel

[wimve]

The rangefinder tube contains four instruments:
1 A stereoscopic rangefinder of 10,5 m base.
2 A stereoscopic spotting telescope of 11 m base.
3 A stereoscopic laying telescope of 6 m base.
4 A stereoscope training telescope of 6 m base

Daniel,

Danke !

Never thought that this complicated device was so much more complicated. I can see the reason to skip the training device.
It also means that the outer four optics are for two devices. So what is the difference between a spotting telescope and the range finder ?
The range finder is more or less known: match the picture of the object and the device measures the angle and therefore the distance of the object (I guess). But what does the spotting telescope do ?
And what is a laying telescope ?

[wimve]

Hello again,

As a side trip I am also modelling the (former) 10.5 Entfernungsmesserturm at Rozenburg.

E-Messerturm_Rozenburg_A.jpg (226.36 KiB) Viewed 1923 times

On this tower there where "clockworks" to pass information on to the gun batteries when the telephone was dead.

1) does anyone has any information about these devices ?
2) anyone which more detailed info of the inside of the E-messer as well as the access-ladder for the copula ?

[stril]

Hello
Great work !!

On this tower there where "clockworks" to pass information on to the gun batteries when the telephone was dead.

The link below have some useful information about this kind of system, also called a range clock or consentration dial.
regards
stril
http://www.patriotfiles.com/forum/showt ... p?t=111568

[AvB]

I don't believe there was a front turret on the Leitstand.

[stril]

I don't believe there was a front turret on the Leitstand.

Related to my posting ?
regardss
stril

[AvB]

Sorry I was replying to Wim's excellent model.

[wimve]

Sorry I was replying to Wim's excellent model.

Ok, so where do think that I have a front turret ?

I don't believe there was a front turret on the Leitstand.

Under the E.M. copula there is a periscope see this picture, inside its own armour.

This is more or less a standard combination. On the leitstand in Hanstholm, you will find the same combination as well as shape of the concrete.

In the case of Rozenburg the lower part is is protected with 150cm concrete. Therefore you see a "balcony". In front of this you see two of the eight (?) clocks. Like the answer of Stril says, they are for a alternative way of communication with the gun batteries.
Which does bring me to the next : how did they do this in "the dark of night" ? It doesn't make sense to illuminate them. Off coarse a optical device in the dark has also its limitations.

[AvB]

Yes but these are not towers. For example the tower at Ile de Ré of Karola has kind of a steel box.
Same with Plouharnel. Is there a aerial photo of the tower?

[wimve]

Yes but these are not towers. For example the tower at Ile de Ré of Karola has kind of a steel box.
Same with Plouharnel. Is there a aerial photo of the tower?

Sorry Arthur, no arial photo, but is a drawing OK too ?

Copright and big thank you too JackKo

E-Messer_Rozenburg_top.jpg (33.77 KiB) Viewed 1879 times

[AvB]

Ok I'll shut up now

[jopaerya]

Hello

On this picture you can see the rangefinder is placed on top of the "Leitstand"
and the two section of the armered cupola .

Photo's = Ebay

Regards Jos

[jopaerya]

Here the command post of Grösser Kürfurst with radio antanna on top of the roof , right a other bunker .

Photo = Ebay

Regards Jos