I had to revise my Soviet gun dispersion page 34 when I found out that the 1951 US document I was basing my calculations on had mis-translated captured Russian firing table information. It had translated Russian 'mean deviation' for 'median deviation'. That may seem a small matter but they are not mathematically the same. When the deviation is described as 'median deviation' it results in making the 50% probability of a hit ~18% less likely. In effect making Russian guns less accurate. Several pages have to be changed so it may take awhile to do.
December 22, 2016
A new page of a tongue-
in-cheek look at R&D military science in Star Wars.
October 14, 2016
A new page on some strange ballistic behavior I found examining WWII Firing Tables. I have no opinion as to 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