Screenshot of BurnSim 3.0.

Greg Deputy is happy to announce that BurnSim 3.0 has been released.  BurnSim is a solid rocket steady-state ballistic simulation software for the Windows® platform.

In a nutshell, input your motor, nozzle and propellant characteristics and BurnSim calculates the Kn through the burn and predicts estimated chamber pressure and motor performance. Once your motor design is in BurnSim, you can tweak the parameters such as nozzle diameter or grain core diameter and instantly see how the Kn, chamber pressure, and motor thrust is affected. BurnSim will also optimize your nozzle design.

Motor designs in BurnSim can be saved and recalled for later use.  In addition, test data can be imported and graphed alongside simulation data to compare sims to results.  BurnSim allows you to make notes about your propellants and motor designs, all saved in one convenient location.

Once you're happy with the your motor design, BurnSim can then export a .ENG file for use in RockSim, wRasp or other rocket flight simulators. You may also export the data to a text file (comma delimited) for use in virtually any system. You can estimate your motor's performance and rocket's flight before you even cast a grain!

Changes in BurnSim 3.0 include:

• Context sensitive help / documentation
• Ability to mix grains of different propellant type
• Import test data and graph it alongside simulation data for comparison, imported data saved with to the motor design for later use
• Keep notes on propellants and motors
• Vary propellant a, n, and ISP* for different pressure ranges
• Graphic illustration of defined propellant grains
• Calculation of nozzle exit diameter from given expansion ratio
• Port/throat ratio, as well as throat/port
• UI changes and miscellaneous bug fixes
• Migrated to Microsoft .NET™ platform

BurnSim 3.0 licenses are being priced at $39.00, 2.x License holders can upgrade for $14. 

Visit http://www.BurnSim.com for details and downloads. 

Windows® is a registered trademark and .NET is a trademark of Microsoft Corporation in the United States and other countries.

05-06-2008 06:45 PM  #1
Just Jerry Freeform rockets advocate   Joined: Aug 2006 Posts: 725	Re: Updated version of BurnSim is now ready for release Can you define an arbitrary grain geometry, ie. what they use in spherical motors, or some arbitrary angled star shape? If not, can it be hardwired into a custom build for a fee? Rocketman

05-06-2008 11:11 PM  #2
blastzone New Member   Joined: Aug 2006 Posts: 2	Re: Updated version of BurnSim is now ready for release A spherical motor would be a 3D grain, 3D grain support is being worked on for a future version, although spherical motors are pretty uncommon in the HPR world, so the ROI may not fly for that. Arbitrary 2D grains, like a funky angled star grain is something that will be supported by graphically iterated grains, which is also in the works.