Non-homogeneous armor(NHA) in WW2

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Peasant
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Re: Non-homogeneous armor(NHA) in WW2

Post by Peasant » 07 Jan 2019 14:31

Some great info on the matter, something I will sort through at the latter date: http://www.navweaps.com/index_nathan/Mi ... enetration
And: http://www.combinedfleet.com/okun_biz.htm

whelm
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Re: Non-homogeneous armor(NHA) in WW2

Post by whelm » 08 Jan 2019 04:34

https://imgur.com/a/f8jjYr5

2 pdr ap

1942 cast
1943 homo

apcbc

1943 cemented and homo

40mm

1943 homo

Peasant
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Re: Non-homogeneous armor(NHA) in WW2

Post by Peasant » 08 Jan 2019 22:19

whelm wrote:
08 Jan 2019 04:34
snip
Thanks for the input whelm, this data will be a useful addition to this thread.

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Mobius
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Re: Non-homogeneous armor(NHA) in WW2

Post by Mobius » 08 Jan 2019 23:51

whelm wrote:
08 Jan 2019 04:34
https://imgur.com/a/f8jjYr5
2 pdr ap
Thanks, Boy those early graphs are primitive. CV/1 they tried to make the logrithmic range scales with a typewriter. Coverting to metric is confounding.

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Re: Non-homogeneous armor(NHA) in WW2

Post by seppw » 09 Jan 2019 13:57

Mobius wrote:
08 Jan 2019 23:51
whelm wrote:
08 Jan 2019 04:34
https://imgur.com/a/f8jjYr5
2 pdr ap
Thanks, Boy those early graphs are primitive. CV/1 they tried to make the logrithmic range scales with a typewriter. Coverting to metric is confounding.
What irritates me most about the graphs is the quality of scan. I can barely read anything on the last three images - it probably does not help that I don't own the best display.

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Mobius
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Re: Non-homogeneous armor(NHA) in WW2

Post by Mobius » 09 Jan 2019 14:52

seppw wrote:
09 Jan 2019 13:57
Mobius wrote:
08 Jan 2019 23:51
whelm wrote:
08 Jan 2019 04:34
https://imgur.com/a/f8jjYr5
2 pdr ap
Thanks, Boy those early graphs are primitive. CV/1 they tried to make the logrithmic range scales with a typewriter. Coverting to metric is confounding.
What irritates me most about the graphs is the quality of scan. I can barely read anything on the last three images - it probably does not help that I don't own the best display.
They must of been scanned long ago or the paper didn't age well.
Here is what a firing table of the 2 - pdr would look like if used the strike velocity of the Russian table. It is pretty close to the graph range numbers but they don't have tic marks so their positions are hard to judge.
2 pdr AP table-j.jpg
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Mobius
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Re: Non-homogeneous armor(NHA) in WW2

Post by Mobius » 14 Jan 2019 17:37

Whelm. do you also have CV/28? That is a revised CV/1 and will probably have a better range scale.

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Re: Non-homogeneous armor(NHA) in WW2

Post by whelm » 14 Jan 2019 23:29

Mobius wrote:
14 Jan 2019 17:37
Whelm. do you also have CV/28? That is a revised CV/1 and will probably have a better range scale.
https://i.imgur.com/5aGYsgY.jpg

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Re: Non-homogeneous armor(NHA) in WW2

Post by seppw » 14 Jan 2019 23:54

whelm wrote:
14 Jan 2019 23:29
Mobius wrote:
14 Jan 2019 17:37
Whelm. do you also have CV/28? That is a revised CV/1 and will probably have a better range scale.
https://i.imgur.com/5aGYsgY.jpg
Thanks, whelm! This scan is of great quality. :D

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Mobius
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Re: Non-homogeneous armor(NHA) in WW2

Post by Mobius » 15 Jan 2019 01:46

Thank whelm. CV/28 fixes problems with CV/1 ranges beyond 1000 yds.
I've put those CVs to use as wiki or Warthunder doesn't seem to want to use real historical data.
http://panzer-war.com/page61.html

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Re: Non-homogeneous armor(NHA) in WW2

Post by whelm » 15 Jan 2019 03:27

Mobius wrote:
15 Jan 2019 01:46
Thank whelm. CV/28 fixes problems with CV/1 ranges beyond 1000 yds.
I've put those CVs to use as wiki or Warthunder doesn't seem to want to use real historical data.
http://panzer-war.com/page61.html
https://imgur.com/a/lGV4IFu

littlejohn if you are interested as well

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Mobius
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Re: Non-homogeneous armor(NHA) in WW2

Post by Mobius » 15 Jan 2019 04:25

Thanks. Two marks of Littlejohn. Something I didn't know.

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Re: Non-homogeneous armor(NHA) in WW2

Post by Peasant » 16 Jan 2019 04:37

This is pretty much exactly what I've been looking for: https://apps.dtic.mil/dtic/tr/fulltext/u2/a954860.pdf

Image

And also this is somewhat informative: https://apps.dtic.mil/dtic/tr/fulltext/u2/a954407.pdf

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Re: Non-homogeneous armor(NHA) in WW2

Post by Peasant » 17 Jan 2019 18:55

Something I've realized while reading this: if in the live tests on proving grounds the researches are using specially made ammunition, it's likely to have better average quality than the mass produced ammo used in the field tests. Since the performance of FHA is heavily dependent on whether it can break the projectile or not, we have another source of error to account for.

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Re: Non-homogeneous armor(NHA) in WW2

Post by critical mass » 23 Jan 2019 18:32

The Pz III FH plates are interesting because they happened to shatter early 2pdr capped A.P. as if they had no cap at all. It´s not a rare event (if the shot head is too hard, f.e.) but what is interesting here is that this happened without the plate beeing much inferior to a regular homogenious armor, indicating a good balance between toughness and hardening and little, adverse scaling effects.

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