Quote:
α=30
PzGr.39 / 43 ( APCBC)
weight velocity 100 m 500 m 1000 m 1500 m 2000 m
10.2 kg 1000 m/s 202 mm 185mm 165mm 148mm 132mm
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Soren, at last but not least, I know your opinion well: German target plates and standard are the best in the world, OK, let's double the penetration of kwk43, would you be satisfied?
Quote:
α=0
PzGr.39 / 43 ( APCBC)
weight velocity 100 m 500 m 1000 m 1500 m 2000 m
10.2 kg 1000 m/s 404 mm 370mm 330mm 296mm 264mm
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It looks really good.
1) penetration of kwk43 decrease 40mm every 500m while D25T decreases 10mm-----Kwk43 even decreases faster than D25T.
2) the advantage of kwk43 over d25t is below:
@blank point: 404/162=249%
@500m: 370/152=243%
@1000m:330/142=232%
@1500m:296/132=224%
@2000m:264/122=216%
The advatange of kwk43 DECREASES while range increases. It's the conclusion of Official test of German and Russian.
There must be sth. "wrong" with US test.
It's said that german techinichers deliberately used thick/low quality plates to get higher pen. in order to get through Gestapo's check in late period. US test also applied thick/low quality plates. However, russian used thin-high quality amor to test their guns and that's why russian blank point range pen. is absent!
In my opinion, on high quality plate(K=2400),the correct pen. probably here:
Quote:
α=0
0m 500m 1000m 1500m 2000m
D15T/AP (162mm) 152mm 142mm 132mm 122mm
Kwk43/apcbc (173mm) 154mm 138mm 124mm 110mm
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All official test tables are of sencond hand, the first hand pen should be like this:
Quote:
360m 743m 1048m 1380m 1476m
Kwk** 150mm 140mm 130mm 120mm 110mm
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The reason is that it's very unconvenient to produce unregular thickness plate such as 123mm....
There is a convenient methord to calculate Equivalent stoppoing power.
For AP sharp tip shell. De marre function is accurate, for instant D25T's AP shell
For apcbc shell, De marre fuction is NOT accurate any more, however, we can estimate it using Average of De marre's result and staight distant.
For exmaple, 80mm/55 facing 88mm apcbc shell. De marre AP fuction's result is 188mm vertical Equivalent thickness while 80/cos55=140. then the average is (188+140)/2=164mm.
when facing 122mm AP sharp tip shell, the Equivalent thickness can be directly calculted form De Marre's fuction. The result is 166mm which is very close to kwk43's apcbc's.
As you can see, and 650metres distant, the vertical penetration of D25T/ap and kwk43/apcbc are almost same! And their Equivalent thickness on 80mm/55 are almost same, so I can say they will penetrate panther D glacis at almost same distant. Finally, the FACTS has proved my caculation, they can both pen. the glacis @650m!
That's my methord and this is totally Compatible to many battle facts I've knew. For instant, kwk43's apcbc could pen. T34/85 glacis up to 2000m. T34/85, pershing and Tiger's APCR shells are useless facing Panther D's glacis. Pershing's APCR can only pen. Panther G version glacis @ blank point.
If anyone is interested in amor penetration,pls provide me more battle examples.