100 mm HE, Skoda / Yugoslavia

[Przemek]

Hi,

I am looking for a photo or good quality drawing [and shell length] of a Yugoslav 100 mm HE shell for Skoda howitzers.
In German nomenclature: 10-cm Sprgr. (Dopp.Z.) 311 (j).
Shell without reducing screw. Thread ~48 mm / for Czech VG SKR and VG CR fuzes.
First of all, it is about the shape of the rear part of the shell - in the US drawing it looks straight cut - different from 100 mm Czech and Polish shells (rounded, for example in the drawings a Czech 10 cm dopp z gr 30 [t]).
The photo from the German manual [a/left] is blurry but shape of the rear part looks like as at drawing, but the ring probably does not have a groove [?].

I also wonder if any other country used this version - a 48 mm thread and a shell without a reduction screw and a rounded back part.

I will be grateful for your help.

Regards,
PM

 

[AKON_]

What you are looking for is ammunition for the export 100mm howitzer vz.28 (jug : M.28)
-export to Yugoslavia
- the Škoda factory designation was: FE.

-Sprgr.- 14,3kg
Dopp-Sprgr. -16kg
Akon

 

[MINENAZ16]

I think this one.
Thanks for the owner of the picture (in my computer, I can't remember where I found it).

 

[Przemek]

Thanks.

I remember this photo, probably from "wk2ammo" - "Greif" collection, /if i good remember/. So it turns out that it also had a rounded back. Perfect.

 

[AKON_]

-2 grenades from the left is Skoda's export to Romania : 10cm Sprgr.38(rum), Drawings 013C1581 (the body is marked "rum", ), New versions were also offered 100mm incendiary grenade (M.43) was also designed (and tested) for Romania. I don't know how far it went. Not in the picture...
-1 grenades from the right is 10 cm Ostrý časovací granát vz.21 ( Škoda before the war-marked red 1924 )
-----
For 8cm vz.30 ammunition , the radius of the rear ogival its R-254mm.
For 10cm vz.30 ammunition, the radius of the rear ogival its R-300mm.
For 10.5cm vz.30 ammunition, the radius of the rear ogival its R-322mm.
Akon .

 

[AKON_]

Re :
10 cm Sprenggranate 38 (rum) - weight 13,65 kg .
10cm A.Z.Gr. 30 (t) -weight 16kg.
10cm Dopp.Z Gr. 30 (t) -weight 16kg.
10cm Dopp.Z.Gr. 21 (t) -weight 16kg.
Akon .

 

[Przemek]

Thanks. Polish models 100 mm wz. 28 and wz. 31 (shells types for French fuzes): R-300 mm.

 

[AKON_]

100 mm wz. 28 -weight 13,940 kg + RYG wz.18 (220g) or 24/31; (alt.) 160g ; RYG vz.17 (395g) ...

 

[AKON_]

Skoda export to Romania: 100mm Md.34 -weight 15kg . (Thread 36x1.5 )


Will someone complete the radius R- of the bottom of this design?
In addition, Skoda exported 100m Md.30 ammunition to Romania....

 

[Irod7]

Just some extra info to complete @AKON_ `s information about Romanian 100mm Skoda shells:


Romanian designation/Skoda designation/weight/fuze

No. 1 / Md.1930 / 14.4 kg / U3
No. 2/ Md. 1934/ 15 kg / U3
No. 3/ Md.1930/ 16 kg / CHZR or U3 or VG-SKR or VG-CR
......
No. 8/ Md. 1943 Costinescu APHE shell / 13,35 kg/ C-8
No. 9 / Md.1938/ 13,65 kg/ U17

For No. 9 the only reference so far is a box label, but since the model year and weight matches I think we can be sure that it`s 10cm Sprgr. 38 (rum) and U17 is one of AZ23v/AZ23Pr/Az1.

The bottom radius is R480.

 

[wingsofwrath]

Can confirm what @Irod7 said, here is my drawing of the bottom of the Romanian Skoda No.2 shell.

However, there is also the afore mentioned 10cm Sprgr. 38 (rum) which has that lower radius 304mm according to this plan:

 

[Przemek]

I wonder if there is an error in the American drawing (but rather, this is a very simplified drawing.). Shouldn't there be a screw with a brass cover (Yugoslav version of the projectile) there?

The image shows a comparison of the drawings and photos of shells (Yugoslav version [?] [shell relic with fragments of the reduction - steel ring + brass tube - fragments only/destroyed], typical chamber as in steel shells (not cast iron). For comparison one of the Polish models - wz. 28 (for French fuzes))
[inert/shells / old museum exhibits].

ps. 22 cm anti-concrete Skoda /to PL/ - R=400

 

[wingsofwrath]

So, I pondered this question for a bit and reached the conclusion that there were two types of boat-tails to these shells - the Vz.28 and Vz.30 (Romanian No.3) shells had a radius of 300mm with a 6mm fillet and the Vz.34 (Romanian No.2) and the Romanian No.8 had a radius of 480mm with a 3mm fillet at the bottom.

I constructed the shape of the Romanian No.3 shell (Czech Vz.30) and it matches exactly with the American drawing you shared (by the way, the "83mm" on the bottom is the place where the main radius would meet the flat bottom if the 6mm fillet did not exist).
Also, the German plan of the Sprgr.38 (rum) actually shows a 300mm radius with the last digit smudged so it looks like a four - once you're looking at it thinking it might be a zero it becomes obvious, so we can conclude it also had the same type of bottom.

Another difference between the two types of shell is the rotating band - the earlier version (Vz.30 /Nr.3) had a 16mm one with a groove and a flat bottom, while the later one (Vz.34/Nr.2) was 18mm tall with a groove and vertically symmetrical. The diameters of both rotating bands and bodies of the shells are identical.
And since in the drawing of the Sprgr 311 (j) we can see the latter type and the boat-tail radius looks less curved, it must mean it has the same lower profile as the Vz.34, so a 480mm radius with a 3mm fillet.