BurnSim is great! Easy to use, very accurate, versatile, and just plain fun to play with. -Terry McCreary Tripoli Board of Directors Author Of Experimental Composite Propellant

You may download BurnSim and use it at no cost, with some limitations. Until activated, BurnSim will only run 10 simulations at a time, and you cannot save your files. For the small license fee of $39.00 you get unlimited personal use of the software (single user - up to 5 installs/reinstalls). BurnSim 2.x license holders can upgrade to version 3.0 for $14.00. This fee supports the author's efforts and promotes the continued development of BurnSim. Click the registration link above for more information.

• Click here for Version 3.0.0.99 Full Install (<1 meg)
  

Known Issues

• Printing is buggy

Please email burnsim@blastzone.com with bug reports, questions, or feature requests.

Version History

Version 3.0.0.99
bugfix - expansion ratio and nozzle exit diameter problems fixed
bugfix - installation over old version no longer requires uninstallation first
bugfix - was not redrawing graph when turning off graph lines, now does
perf - sim time improved by 20% on motors using same propellant in all grains
bugfix - propellant data saved to motor files didnt include propellant PVPs and notes

Version 3.0.0.98
bugfix - max kn not working
bugfix - zero nozzle throat error when clicking new sim button
bugfix - unsaved file check when clicking new sim button

Version 3.0.0.97
Context Sensitive Help / documentation
Calcluate exit dia from expansion ratio
Port/throat ratio is back, as well as throat/port
Graphic display of propellant grains
Ability to mix grains of different propellant type
Vary a, n, and ISP* for different pressure ranges
UI changes and miscellaneous bug fixes
Keep notes on specific propellants and motors
Import test data and graph it alongside sim data for comparison, imported data saved to the motor for later use
Migrated to Microsoft .NET platform

Version 2.3.71 (release)
Added Finocyl Grain Support
Printing of simulation data is now supported

Version 2.3.67
Various bug fixes

Version 2.3.57 (release)
Added Finocyl Grain Support
Printing of simulation data is now supported
Added control of graph line colors
Can now choose from either nozzle calculations or given thrust coefficient for thrust calculations
Can now specify nozzle flow efficiency and ambient pressure for Nozzle / Momentum Thrust Calculations rather than assuming sea level
Installing over an existing version will no longer wipe out your propellant data
Friendlier to smaller motors (sub 10 NS)
Propellant properties now saved in motor files so when sharing files the propellant data is brought across with the motor data.
Fixed bug when exporting ENG files, delimiter between delays
Fixed "Subscript out of Range" error on motors with a >10 second burn time
Fixed bug where motor fields cleared if you hit cancel on file open dialog
Other miscellaneous bug fixes

Version 2.2.21
Minor bug fixes, including 'unknown registration condition' error

Version 2.2.17 (Release)
Removed 3rd Party Graphing component, graphing now faster, reduced installation dependencies
Fixed bug when exporting ENG files of regressive motor burns

Version 2.2 BETA 2
Corrected field validation issues with nozzle dimensions and simulation cutoff
Improved nozzle optimization speed
Added 'Minimize' button
Fixed UI Tab order issues
Other Miscellaneous minor bugs

Version 2.2 BETA 1
Updated UI
Fixed D Grain calculation issues
Added Thrust Coefficient calculations based on nozzle dimensions, no longer need to provide an estimated Thrust Coefficient.
Nozzle optimization
Cut off simulation at x% of max thrust

Version 2.1.14
Fixed form resize issue
Changes to help some win98 issues
Added option to set simulation sample rate
Export data to .csv
Corrected .ENG file issues
Added some tooltip help popups (hover mouse over items in BurnSim to see what they are)
Added status bar
Eliminated conflict with Hybrid Design Program

Version 2.1.2
Miscellaneous Bug Fixes
Licensing Validation

Version 2.0.17
Fixed several miscellaneous issues surrounding .eng file exporting
Removed dependancies on scripting components

Version 2.0.14
Corrected error when loading .bsx files from older versions of BurnSim
Added message when .eng export is cancelled
Found and fixed issues with exporting .eng files with invalid content

Version 2.0.13
Fixed zero thrust issue

Version 2.0.12
Corrected install issues
Added support for D grains
Now exports .eng files for use in rocksim or wrasp
ISP* vs ISP clarifications

Version 2.0.7
Initial public release