whether or not they are in error or not. It just requires more work to get my ballistic calculator to match the firing tables of these guns. This is outside the equations of Robert McCoy who came up with the original programming of the ballistic program. See page 52.
September 5, 2016
Since the Equivalent armor protection study may be a big deal I'm going to release my BHN Equivalent Armor Protection calculator. See page 36.
September 2, 2016
A revelation. It looks like all US tables of captured German guns penetration and ballistics were done by the British. The criteria and target armor specs changed in late war to coincide with US needs and maybe with US cooperation. But tables once thought to originate at Aberdeen now appear to be copies of British Ordnance Board test data. link
June 25, 2016
A new page on the German 50mm gun has been added. Some problems I found in data link
Jan 10, 2016
I updated Enigma 2 program to generate new Powerball number scheme here. [zip]
December 15, 2015
My friend Joe (a contributor to Panzer War) has made his own set of rules that could be called Panzer War featherweight. Free PDF of Kampfgruppe rules here. [zip]
December 2, 2015
Updated page 48 with two graphs of 75mm/L70 KwK 42 ballistics. I compare Aberdeen data to German data for this gun. Though there are questions with both data sets this is the best comparison that can be done with available sources.
November 14, 2015
For awhile it looked like the Germans normalized their gun penetrations. That is adjusting the numbers by multiplying by a ratio factor depending on armor hardness quality. If the 75mm/L70 table data is compared to the 75mm penetration graph it seemed like the armor hardness was normalized to 243 BHN. But, when the data for the 75mm KwK 40 was compared in the same way the data showed that no normalizing took place. The armor was what it was, namely 289 BHN. I guess I could keep on comparing different guns.
October 28, 2015
In case you are curious on how I determine gun penetration. I use a computer program that averages as many good data sets as I can find. They have to be unique and are normalized to the US standard V50 criteria. However the sets are also adjusted to an armor hardness of 270 BHN. Which is close to the German test armor quality of 80-105 kg/mm2 of 244-303 BHN or avg. of 267 BHN. Unlike others I don't use DeMarre* nor some other formula to come up with my own values. It is hard enough just trying to normalize the official data from different national tests and I don't want to come up with speculative factors to account for shell design or nose hardness.
An example: the Soviet 85mm S-53 tank cannon. The colored lines represent a single data set, the black line represents the average of 5 sets. The final values are rounded to the nearest centimeter and ranges given depending on what game they are for.