June 17, 2015
We had a weird down time. The domain disappeared from world servers for about 24 hrs. Made me think about when this site ends. June 8 2016 the registration name expires. I don't think I'll renew so save your copies.
Plus we are a big source for references for War Thunder and World of Tanks.
May 18, 2015
In order to model the 122mm gun tables for the BR-471B D-25T and D-25 I had to add a ballistic coefficient taper function. I don't know why but the 1960 DDR (Deutsche Democratic Republic aka East Germany) 781 m/s table needed to be tapered at 5.8 x that of the 795 m/s Soviet table. It seems very odd that 14 m/s would require any change at all. Regardless these firing tables can be modeled with my Ballistic Accuracy program. link
Mar 31, 2015
I'm slowly making my way updating the gun charts. I'm adding the "K" ballistic factor to the table so I know what I used to generate the data. Right now I'm working through the German tables but haven't done all of the guns yet.
Mar 26, 2015
New Reference page of Aberdeen data on 75mm guns. Page 48.
Mar 24, 2015
The 2015 March Madness program for the final 16 is here.
Mar 21, 2015
I've been running some tests to double check the ballistics of some shells. I have some data tables on Russian guns that look like they were made during WII or right after. Working backwards from terminal velocities to get the ballistic coefficients I find that the only solution agrees with the 'Ingalls' ogive G1 G‚vre drag function. Which is odd in that this is for the older shaped shells, not the aerodynamic ballistic APBC shells. I wonder if the firing tables were calculated numbers and not actual test results. Later tables like the 1964 DDR and 1972 US protection tables for the 122mm shells have G7 (tangent ogive) G‚vre drag function solutions. I need more data to come to a conclusion.
Mar 8, 2015
Thanks again to
Jeff who sent me post WWII US documentation on Japanese guns. I'm organizing the different types of guns, especially the 8 varieties of 37mm types. Ballistics sources on Japanese weapons are a bit thin so this helps a great deal. I'll make another update of Japanese guns in a few days.
Mar 5, 2015
Jeff sent a update to his Panzer War MS-Access program that automates game play.
February 1, 2015
Updated Japanese gun data table.
January 31, 2015
I made a quick update of some data on the Japanese tables. Then realized I hadn't updated then in 10 years. I have acquired new sources in that time. Also I am now converting to the Ballistic formula that I use in other table. This is on going as there still is conflicting data that I am sorting through. This ought to take a week to complete.