Fu.M.O. 51 Mammut Gustav

[dirk Peeters]

This one has a soccle on the roof (for the radar) but there is a freya in the neighborhood in its stone emplacement
the other V 256 has only bthe soccle from which the plan you find here a litlle higher
Dirk

[Nectar]

Hi, according to the GEMA book this gerät was called FuMG41G(gA) with the covername Mammut-Gustav, how this connects to the experiment with the FLUM-Fn-Gerät and the other Mammut-Gustavs is a great mystery to me. Have to find this book somewhere

Die Marine ging wieder eigene Wege. Anfang 1941 mußte die GEMA, trotz aller Anspannung, mit dem NVK eine spezielle Fernsuch- und Seewarnanlage entwickeln, die als FuMG41G(gA) auf der Welle g unter dem Decknahmen „Mammut-Gustav" eingeführt wurde. Auf einem Betonfundament stand, drehbar auf einem Schienenkranz, die stabile Gerätekabine mit einer gitterartigen Dachkonstruktion zur Befestigung von sechs Antennenfeldern der Calais-Anlage. Als reine Such- und Warnanlage war der Mammut-Gustav mit einem DeTe I-Gerätesatz nur für Maximumpeilung ausgerüstet. Die Reichweite entsprach der des Würzburg-Riesen. Da die Marine dieses Gerät von Telefunken einzuführen gedachte, wurden nur vier Mammut-Gustav aufgebaut.

Too much Mammuts these last days

[jopaerya]

Hello Maarten

According to Trenkle (page 134) the Fu.M.G.41G(gA) { early name *} is the same as Fu.M.O.51 Gustav
in many books it's written that there were four naval Fu.M.O. 51 in service . Yes you are right this Mammut
radar could be turned around otherwise the Mammut Fu.M.O. 52 Cäsar and Mammut Fu.M.O. 53 Cäcilie that
were placed static on a bunker like the V 143 . Strange is that on German document the Fu.M.O. 51 Gustav
at Le Conquet was called Gustav IV and Paimpol Gustav V for only four Gustav radars .

(1) Cap de la Heve ( Le Havre )
(2) La Pernelle ( Cotentin )
(3) Paimpol
(4) Le Conquet ( near Brest )

* On 10-1943 the naval radars were renamed in Fu.M.O. and other last letters for other functions

Regards Jos

[Nectar]

Thanks for the information Jos, I do not own a copy of Trenkle. It is another book on my list to buy

On what kind of document did you find the IV & V mentioning? Was it a serial-numbers list by any chance?

Could it be that nr. I was the FLUM-Fn-Gerät?

[SES]

Hi,
There were three versions of the Mammut.
The FuMO51 Gustav which we discuss here.
The FuMO52 Cäsar with three masts mounted on a V143.
The FuMG 41/42G with four masts mounted on a L485
The FUMO53 Cäcillie was a project with wideband frequency, which (until proven otherwise ) was never fielded.
bregds
SES

I can that Jos and I were scrambling to explain at the same time

[Nectar]

Thanks SES.

I'll have to look into the renumbering of the FuMG&FUMO system. It's a mess in my head right now

Regards,

[jopaerya]

Document is from Alain Chazette .

Regards Jos

[jopaerya]

Here the document from 1942 with the four Mammut Gustav , there were 4 Mammut Gustav given to
Marinegruppenkommando West , so there could be others Gustav in other area's .Please note also the
planned Gustav at Cap de la Haque was replaced by a other Mammut with V 143 and was placed at
Le Conquet .

Regards Jos

[Nectar]

Thanks for the documents Jos. The first one seems to be on requirments for energy?

[nordfriese]

Hi!

There were three versions of the Mammut.
The FuMO51 Gustav which we discuss here.
The FuMO52 Cäsar with three masts mounted on a V143.
The FuMG 41/42G with four masts mounted on a L485
The FUMO53 Cäcilie was a project with wideband frequency, which (until proven otherwise) was never fielded.

SES wrote down, what Trenkle wrote in his book.

In KTB of Ozet Cherbourg, the Kriegsmarine mentioned a Luftwaffe-Mammut "Cäcilie" in their area.
The question is, if this "Cäcilie" is the "Mammut Cäcilie" or just the "nickname" of a Luftwaffe-Mammut?
(For example: The FuMO 214 on the island of Amrum had the nickname "Anneliese". Like "Cäcilie" also a
German female first name.)

Best wishes
Rolf

[jopaerya]

Hello Rolf

Most Luftwaffe radar posts or seperate radar material that I have seen had no female code- or nicknames ( they were mainly used by Kriegsmarine radar )

Regards Jos

[nordfriese]

Hi SES!

Most Luftwaffe radar posts ... had no female code- or nicknames ( they were mainly used by Kriegsmarine radar )

Yes, of course you are right. Sorry, I mixed up Luftwaffe and Kriegsmarine...
So it must have been a Mammut-Cäcilie.

Best wishes
Rolf

[SES]

Hi,
I have re-read Trenkle and now interpret his text as one FuMO 53 was actually deployed for trials.
It is odd if a KM system should be in LW service, but it was located very close to AMMER.
What is also odd is the pickup range mentioned in the report. In oder to obtain line-of-sight at 100 km either the antenna or the target has to be at 3.000 ft/1.000 m. Since the targets were classified as ships, my guess is that they were barrage balloons towed by ships.
Attached pictures of the Mammut at Jobourg. Very hard to tell if it was a three or four mast version
bregds
SES