The version 2.3 full release is now available!

New features include nozzle calculations and optimizations, new UI, and more!

What is BurnSim?

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 effected. BurnSim will also optimize your nozzle design.

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!

Features:

Supports the following grain configurations in any number and combination:
BATES grains with 0-2 restricted ends
End burning grains (defined as BATES grain with zero diameter core)
Moon or Offset Core
D Grains
C-Slot
Finocyl
Star
X-Core

Instantly see a graph of Kn, chamber pressure, thrust, and see how it changes when you change motor attributes.
Graph Mass Flux over the burn, a value that can be used to monitor erosive burning
Save your motor designs and propellant characteristics
Export predicted motor performance into .eng files for use in Rocksim or wRasp
Export predicted motor performance into .csv files (comma delimited text files) for use Excel or any other program.
Thrust estimations based on nozzle geometry
Optimize your nozzle design for maximum performance.

Future Features

* Pressure drop (burnout or boost-sustain) transient simulation
* Ability to use different propellants in each grain of a motor
* Additional Grain types such as Finocyl, requests?
* Support for units other than English
* Erosive burning predictions
* Printing
* Your suggestions!

PLEASE NOTE!

BurnSim estimates chamber pressure and performance assuming steady state operation. BurnSim (currently) does NOT take into account erosive burning effects which can significantly raise chamber pressures in motors with high L/D ratios. Test all motors in a safe environment, and always assume the motor can fail. Be prepared.

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$30 on CD-rom