#Muzzle energy calculator code#
#Muzzle energy calculator Offline#

Currently, it only works with millimeters and kilograms in the left-side. To use, you first load a hypothetical shell into the left-side panel, and then enter the new caliber you want to scale it to. This will calculate scaled masses for a larger or smaller shell of the same general shape. : Projectile Diameter (mm)Ĭomplex Penetration Algorithms Only : Penetrator Length (mm) Yellow boxes are secondary input fields enter your data and hit enter, and they will automatically translate/convert into the primary input fields. These buttons are missing one (or more) validated basic properties and the drag factor and form factor are completely generic. These buttons have valid basic properties (diameter, mass, muzzle velocity), but the drag factor and form factor are completely generic. no firing table is known, but we assume that the shell form factor is similar to other smaller/larger caliber shells of the same design (example: Panzergranate 39). These buttons contain reasonable assumptions, i.e. PRE-GENERATED TEMPLATES these buttons are matched against known range tables to generate 99% valid form factors. US 1976 Standard Atmosphere Gravity Model Select Gravity Model: Simplified Lunar Gravity US Standard Atmosphere 1976 (Good to 86 km) ICAO Standard Atmosphere 1964 (Jurens Model) Placeholders added in UI for future advanced penetration codes.īritish Standard Atmosphere (Jurens Model)

v1.07 - Incremental work on Range Table Codes to improve accuracy for very flat trajectory, high velocity (sabot rounds) gun tables (4000m code).

#Muzzle energy calculator code#

v1.02-1.06 - Added Range Table generation and refactored code for ballistic range evaluation, bringing heavy naval guns down from 49.6 seconds to 5.5 seconds when firing to 35 km needed for computing ballistic tables for big guns.

v1.01 - Incremental changes to HTML forms improved Form Factor Finder code to reduce program time for a run on Alaska 12'/50 rifles from 63.5~ seconds in v1-00 to 8~ seconds in v1-01.

#Muzzle energy calculator Offline#

NOTE II: The code for the program is contained entirely within this HTML file so you can download it for offline use on your own PC, or to extend/edit it yourself, without having to worry about tracking down dependencies from elsewhere. Just wait and it'll eventually cough out a table.

NOTE: If you are using very short integration intervals AND simulating long trajectories, such as battleship guns at 30-45 degrees, with flight times of 60+ seconds, your browser may seem to hang. It was rewritten into Python in 2018, and then into Javascript in 2020.ĬLICK HERE FOR BACKGROUND ON ORIGINAL PROGRAM Jurens and published in Warships International #1 (1984).

The program source is based off an AppleBASIC program written in 1983 by W.J. Virtually all online ballistics calculators are designed only to work with small arms use-cases. NOTE: This is called 'Big Ballistics' because it supports 'extreme' use cases such as 16-inch naval rifles.