Depth charges

Discussions on all (non-biographical) aspects of the Kriegsmarine except those dealing with the U-Boat forces.
dreamk
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Re: Depth charges

Post by dreamk » 11 Dec 2019 10:11

either a M/24 or a M/33 - they look the same

The Swedes had 2 main types of depth charges in use: The Sjunkbomb M/24 and the Sjunkbomb M/33.

These differed only by minor changes in their sizes and by some characteristics of their fuze.

They acquired in the interwar period a limited number of Italian depth charges, designated M/27i and M/36i, to equip the Italian motorboats they purchased in the twenties and the 2 Italian destroyers bought in the thirties.

The M/24 had a 804mm length and a 440mm diameter
Image
Image

The M/33 had a height of 845mm (900mm with fuze), a diameter of 450 mm (440 mm ?) a weight of 176kg including 105kg explosive (there was an export variant of this bomb weighting 135kg, used by Finland) minimal depth 20m (= safety depth), sink rate 2.5m/s

The M/33 entered in service in 1933 and is still in use today with the Swedish navy!
Image

Sturm78
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Re: Depth charges

Post by Sturm78 » 11 Dec 2019 23:08

Hi dreamk,

Thank you very much for your quick and complete response. :)
There is very little information on the net about this issue and even less from a country like Sweden...

Do you know the weight of the M/24 ?

Regards
Sturm78

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Natter
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Re: Depth charges

Post by Natter » 23 Dec 2019 00:14

Here's a couple of pages from a folder I found in the Kriegsmarine-records at the norwegian national archives a few years back:
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dreamk
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Re: Depth charges

Post by dreamk » 25 Dec 2019 09:21

The Norge bought 200 Sjunkbomb M/33, giving it the appellation "135 kg Djupbomb" as it was a special export version of the M/33, with a content of 135kg of Trotyl explosive instead of the 105kg of Trotyl in the original Swedish M/33 (overall weigt of the original M/33 was 176 kg).

dreamk
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Re: Depth charges

Post by dreamk » 25 Dec 2019 09:41

Sturm Hi!
The M/24 was a copy of a retrieved British Vickers Type D depth Charge - however it was also sometimes designated as the "100kg Sjunkbomb" referring to its explosive content while the British original contained 290lbs of Amatol (131kg). I have no further data on the overall weight of the M/24.

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Natter
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Re: Depth charges

Post by Natter » 25 Dec 2019 18:44

dreamk wrote:The Norge bought 200 Sjunkbomb M/33, giving it the appellation "135 kg Djupbomb" as it was a special export version of the M/33, with a content of 135kg of Trotyl explosive instead of the 105kg of Trotyl in the original Swedish M/33 (overall weigt of the original M/33 was 176 kg).
I never heard of norwegian (I assume "the Norge" = Norway) procurements like this from Sweden, but it's possible of course (the norwegian term for depthcharge is "synkemine").
The documents I provided above, has nothing to do with Norway though.

dreamk
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Re: Depth charges

Post by dreamk » 25 Dec 2019 21:25

Got the lacking info on the Sjunkbomb M/24:
Sjunkbomb modell: Sjb M/24
Typ/varianter: Sjunkbomb. Benämndes inledningsvis Sjunkmina.
Tillverkningsår: 1924 -
Pris: Omkring 500 kr/st.
Utrangerad: 1970 - talet
Ant tillverkade: c:a 1 300 st.
Totalvikt: 164 kg. L 810, D 450.
Laddning: 105 kg trotyl.
Tillverkare: Konstruktion KMF
(K Johansson för Motala Verkstad)
105kg M24 blueprint.jpg
and similar info on the Sjunkbomb M/33 and its various sub-versions
Sjunkbomb modell: Sjb M/33
Typ/varianter: M/33, M/33K, M/33N, M/33T, M/33 mod, M/33 UVT 05.
Tillverkningsår: 1933 –
Pris: 622:- plus Bofors laddningskostnader
Utrangerad: 33/N o K 1978. I övrigt operativ.
Ant tillverkade: Omkring 10 000 (varav 100 st M/33N och 130 st M/33K.
Totalvikt: M/33, 33K: 176 kg, 33N: 209 kg, 33T: 241 kg.
Laddning: M/33, 33K, 33T:105 kg trotyl, M/33N: 135 kg.
Tillverkare: Konstruktion KMF, Mdir Johansson, för lansering av Motala Verkstad.
KMF inköpte tillverkningsrätten vid egna verkstäder.
Motala V tillverkade dock ett stort antal under VKII.
Även tillverkning vid Örlogsvarvet i Stockholm (Karlskrona?)
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Sturm78
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Re: Depth charges

Post by Sturm78 » 19 Jan 2020 15:11

Thank you very much for your information, dreamk ... :wink:

Regards
Sturm78

Sturm78
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Re: Depth charges

Post by Sturm78 » 01 Apr 2020 20:05

Hi all,

Does somebody know the german designation for this depth charge thrower ?

Sturm78
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