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Main Gun Ammo - Revisited


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#961 Wiedzmin

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Posted 27 May 2018 - 0550 AM

neZjUfu9_Bs.jpg

Q2aTNvAqOIQ.jpg

3BM42


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#962 Interlinked

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Posted 27 May 2018 - 0715 AM

What is this showing, Wiedzmin?
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#963 Wiedzmin

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Posted 27 May 2018 - 0719 AM

Mango in flight , "a" and "b"  - measuring points 


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#964 Interlinked

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Posted 27 May 2018 - 1027 AM

Thanks. It's very interesting, but is there more to it? Seems kinda mundane.
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#965 Wiedzmin

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Posted 15 July 2018 - 1423 PM

vdS805aiZZ4.jpg

about L7 and M68 gun barrel, for L7 there is always said "L52"(5460mm) for gun barrel length, but german L7A3 from muzzle to breech end 5347, and M68 barrel seems to have 5346mm length(only barrel) so how can L7 barrel can have "L52" ?  :blink:


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#966 DogDodger

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Posted 15 July 2018 - 1847 PM

There are different ways to measure caliber length. The US prefers bore length, which on the M68 is 210.50" (5347 mm), or 50.92 calibers. On the other hand the Gemans, for example, prefer the length from the muzzle to the rear face of the breech, which on the M68 is 218.50" (5550 mm), or 52.85 calibers. The diagram is incorrectly labeling the arrows, which should show the length of the muzzle to the rear breech face, with the number for the length of bore.

Edit: In other words, the red lines would be a better representation of the 5347 mm caption:
47APbXy.jpg

Edited by DogDodger, 15 July 2018 - 1853 PM.

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#967 Wiedzmin

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Posted 15 July 2018 - 2325 PM

Edit, I misunderstand at first time, yes maybe they labeled it wrong, but for 120mm scheme correct

Edited by Wiedzmin, 16 July 2018 - 0011 AM.

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#968 Wiedzmin

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Posted 18 September 2018 - 0426 AM

A70Zm.jpg
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#969 Stefan Kotsch

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Posted 18 September 2018 - 0512 AM

It is located on the sabot nor the centering ring for storage in the transport container?


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#970 Wiedzmin

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Posted 18 September 2018 - 0627 AM

i think for container.

 

red tip - DU(as on Vant, Valshik etc DU rounds)


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#971 Jim Warford

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Posted 22 September 2018 - 2253 PM

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Wiedzmin; can you confirm the round's designation and name (if it has one)? Thanks!
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#972 Wiedzmin

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Posted 08 October 2018 - 0000 AM

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Wiedzmin; can you confirm the round's designation and name (if it has one)? Thanks!
Sorry, just noticed message , it's 3VBM22 round with 3BM59 "Svinets-1" DU projectile


BTW about DU, AFAIK british DU rods was made from imported US DU blanks, what was the plan of production for UK during wartime period?

Edited by Wiedzmin, 08 October 2018 - 0006 AM.

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#973 DB

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Posted 08 October 2018 - 0405 AM

Probably "Go with what you have, on day 7 everyone glows in the dark"
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#974 Gorka L. Martinez-Mezo

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Posted 13 October 2018 - 0403 AM

M426%20TAM%20Argentina.jpg[/URL]

 

Argentine Army M426 APFSDS 

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Edited by Gorka L. Martinez-Mezo, 13 October 2018 - 0712 AM.

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#975 Gorka L. Martinez-Mezo

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Posted 13 October 2018 - 0416 AM

Another shot of a TAM ammunition rack

43472092640_b9aff15566_o.jpgM426 APFSDS Argentina lowres by glmm2001, en Flickr


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#976 Gorka L. Martinez-Mezo

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Posted 13 October 2018 - 0423 AM

30347741047_8aa126237a_o.jpgOE-105 by glmm2001, en Flickr

OE-105 HE rounds ready to be loaded into a M48A5E2. The Spanish Army still uses the OE-105 made under license in Spain and originally designed for the AMX-30  as the HE round for 105mm gunned vehicles


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#977 Mr King

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Posted 23 January 2019 - 0449 AM


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#978 Loopycrank

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Posted 25 January 2019 - 1426 PM

A70Zm.jpg

 

 

On earlier Soviet 125mm APFSDS ammunition, the oburating ring was at the front of the spool sabot:

 

349_a381.jpg

 

This configuration was clearly more volumetrically efficient than the NATO 120mm round design, which have the obturating ring at the back of the spool sabot.

 

But now the Russians have switched and are doing it the other way.  Why?


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#979 Stefan Kotsch

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Posted 25 January 2019 - 1520 PM

That was inevitable. The projectile has become much longer. So the sabot also gets longer.

 

@edit:

Previously, only a three-piece "traction sheave" as sabot was mounted in front.  And at the tail was held yes in the barrel only by the fins with caliber span with copper nockeds.  Now the sabot is much more complicated.  So it was inevitable that the obturating ring would move from the front to the back.


Edited by Stefan Kotsch, 30 January 2019 - 0645 AM.

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#980 Wiedzmin

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Posted 05 February 2019 - 1721 PM

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