Rocketry Planet

WORLD WIDE WEB — After a long beta period, version 2.3 of BurnSim has been released. BurnSim is a solid rocket steady-state ballistic simulation program for the Windows platform.

In a nutshell users can input motor, nozzle and propellant characteristics, then BurnSim calculates the Kn through the burn and predicts estimated chamber pressure and motor performance. Once a motor design is in BurnSim, parameters such as nozzle diameter or grain type can be tweaked and instantly the effects on Kn, chamber pressure, and motor thrust are displayed. BurnSim will also optimize your nozzle design.

The full list of changes in this version include:

• Finocyl Grain Support
• Printing of simulation data
• Control of graph line colors
• Choose from either nozzle calculations or given thrust coefficient for thrust calculations
• 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

For details, inquiries, or to download BurnSim, visit http://www.burnsim.com.