57x480R cartridges drawings

[pzgr40]

Who can help me on the cutaway drawing of a 57x480R Zis 2 gun BR271P HVAP-T projectile and the O-271 HE Frag shells. Specifically how the powdercharge in the shellcase look like; spacers , cartboard cups and the size and shape of the powdersticks or -grains.

Thanks in advance ,
Regards, DJH

 

[sgdbdr]

Here is for the BR-271P :




Cheers,

S.

 

[Nabob]

Here are some pictures.
You can see that on one the cartridge case is nearly full.
According to the range tables the powder charge in Zh-271B used with BR-271, 271SP and 271K contains 1450g of 12/7 or 14/7 powder.
For Zh-271P used with BR-271P a charge of 1600 (1954 tables) or 1530 (1949 tables).
The powder 12/7 is a Nitrocelulose 7 hole powder.

Bob

 

[M8owner]

My notes say this is out of the Russian manual.

One thing to keep in mind is that there are versions of the HE shell that only one driving band vs. the standard two. I have one such example.

http://www.bocn.co.uk/vbforum/threa...iles-ZIS-2-Antitank-Gun?highlight=russian+zis

http://www.bocn.co.uk/vbforum/threa...quot-Marked-KTM-1-Fuse?highlight=russian+57mm

 

[Nabob]

Here powder dimensions.
You see there is some range.
The 9/7 is there for color and shape reference only.
Bob

 

[Eggburt1969]

Some extra images to help.

First the 53-UBR-217P & 53-UBR-271 rounds.



Second the 53-OR-271 HE-frag projectile.



Third the 53-OR-271U HE-frag projectile.



Forth, additional details on the 53-UOR-271U HE-frag round.



And finally the 53-BR-271P APCR projectile.



For the 53-UBR-217P & 53-UOR-271U rounds, both can use either 12/7 or 14/7 single-base propellant. The '7' in designation referring to the number of perforations and the 12 and 14 referring to the diameter of the perforations (tubes) in 1/10ths of a millimetre, so 1.2 and 1.4 mm. The other dimensions in the table are from the Russian 2009 publication 'Explosives, Gunpowder and Ammunition of Domestic Production - Part 1 - Reference Materials', that was posted by Bob. The image is from part 2 of the publication, 'Drawings and Illustrations'.

 

[pzgr40]

Thank you Gentlemen, that is a great help in making a powdercharge for the cutaway models.
Regards, DJH