BurnSim Wiki - User contributions [en]

Getting Started with a Basic Simulation

2026-08-10T17:20:04Z

Maintenance script:

This walks through building a simple three-grain finocyl motor from scratch. For what each field on screen does, see [[BurnSim Fields]].

== Start a New Motor ==
Open BurnSim and choose '''File > New''' (or just start with the window BurnSim opens with). You'll see an empty Grains grid, a Motor & Nozzle panel with zeroed fields, and an empty graph:

[[File:BurnSim4NewMotor.png|900px|thumb|center|alt=BurnSim 4 with a new, empty motor|A new, empty motor]]

== Add the Grains ==
In the '''Grain Editor''' (below the grid), set Type to '''Finocyl''' and pick a propellant from the '''Propellant''' dropdown - this example uses "Viper". Enter:
* Length (in): '''4'''
* Diameter (in): '''2'''
* Core dia (in): '''0.6'''
* Fin width (in): '''0.15'''
* Fin length (in): '''0.3'''
* # fins: '''6'''
* Ends inhib.: '''0'''

Click '''Add''' three times to add three identical grains, stacked end to end - 12" of propellant overall. The Cross-Section preview updates to show the finned core and the longitudinal cutaway of all three grains.

== Set the Nozzle ==
In '''Motor & Nozzle''', enter:
* Throat dia (in): '''0.5'''
* Exit dia (in): '''1'''
* Efficiency (%): '''85'''
* Ambient (psi): '''14.7'''
* Thrust method: '''Nozzle geometry'''

As soon as a valid throat diameter is set, BurnSim simulates automatically (this is the ''Auto-Simulate on Changes'' setting, on by default - see [[BurnSim Fields#Settings Menu|Settings Menu]]). You don't need to click anything to run it.

== Read the Results ==
[[File:BurnSim4MainWindow.png|900px|thumb|center|alt=BurnSim 4 showing the simulated three-grain finocyl motor|The simulated motor - grains, cross-section, graph and results]]

The graph (bottom left) plots Kn, pressure and thrust against time. The '''Results''' tab (bottom right) summarizes the burn - for this motor, a K-class designation, roughly 1680 N-sec total impulse, a 1.5 second burn, peak chamber pressure around 1480 psi, peak thrust around 380 lbf, and a delivered Isp around 209 seconds - plus designation, Kn max/min, web thickness, propellant mass and length, and initial core volume.

If a design has a physical issue worth flagging - for example a grain core narrower than the effective nozzle throat - BurnSim adds a warning above the results explaining it, rather than silently simulating something questionable. Worth reading whenever one appears.

== From Here ==
* Add more grains, change grain types (see [[Grain Types]]), or try different propellants and nozzle sizes, watching the results update live
* Toggle which traces are plotted with the checkboxes above the graph
* '''File > Save''' (Ctrl+S) to keep the motor as a .bsx file
* Once you have real test data for this motor, see [[Test Data Tab]] to bring it in and compare against the simulation

[[Category:BurnSim 4]]

MediaWiki:SidebarTree

2026-08-10T17:11:58Z

Maintenance script:

Not currently used by the skin (the JS that injected this into the sidebar is disabled in MediaWiki:Common.js, and the TreeAndMenu extension that rendered {{#tree:}} was dropped in the 2026-08 MediaWiki upgrade). Kept as plain text in case sidebar injection is revisited later.

* [[Main Page|BurnSim WIKI]]
** [[Getting Started with a Basic Simulation]]
** [[BurnSim Fields]]
*** [[Grain Types]]
** [[Propellant Characterization]]
** [[Characterization Motor]]
** [[Data Acquisition]]
** [[Test Data Tab]]
*** [[Import from CSV]]

BurnSim Wiki:About

2026-08-10T17:11:35Z

Maintenance script:

The BurnSim Wiki is the documentation for [https://burnsim.com BurnSim], as well as a general Wiki covering various topics related to experimental solid propellant motors.

Documentation here covers '''BurnSim 4''', the current version. Pages for '''BurnSim 3''' are kept under [[:Category:BurnSim 3 (Legacy)|BurnSim 3 (Legacy)]] for users who haven't upgraded yet.

For any questions related to [https://burnsim.com BurnSim], please [https://burnsim.com/contact.asp contact me]

Grain Types

2026-08-10T17:11:34Z

Maintenance script:

==BATES Grain (and EndBurner)==
[[File:Bates Grain.png|none|thumb|91x91px]]
A BATES grain is a simple cored cylinder which burns on the core and end surfaces. End surfaces can be inhibited. This is the most common propellant grain type. A BATES grain can be configured to burn progressively or regressively depending on length. If you want an End Burning grain, specify the core diameter as zero. When doing so, BurnSim will assume one end is inhibited and the other is not, thus only burning from one end.

== C-Slot Grain ==
[[File:Slot.png|none|thumb|90x90px]]
A C-Slot grain consists of a cylinder with a lengthwise slot removed from the side of the grain. The grain burns on the slot/core surface and grain ends. End surfaces can be inhibited. C-Slot grains are often used to give a longer burn time by providing a larger web thickness than is possible with a BATES grain in the same diameter. Disadvantages include increased case insulation requirements along the edge of the grain surrounding the slot.

== D-Grain ==
[[File:Dgrain.png|none|thumb|90x90px]]
A D-Grain is a simple cylinder with a slice removed from the side, resulting in the end of the grain appearing in the shape of the letter D. The grain burns on the ends and flat surface of the 'D'. The ends can be inhibited. D-Grains can provide a very large web thickness in a given grain diameter, allowing for long burns. Thermal issues are more of a concern with this configuration due to the large area of the motor case that is exposed to the flame front for the entire burn.

== Moon Burner ==
[[File:Moon.png|none|thumb|90x90px]]
A moon burner grain so named due to the shape of the grain as the propellant burns. The grain is similar to a BATES grain, with the exception of the core being offset rather than down the center. The grain burns on the end surfaces and in the core, the ends can be inhibited. The moon burner grain is another way to increase web thickness but reduces thermal concerns since the flame front is only exposed to the side of the motor case for part of the burn.

== Star Grain ==
[[File:Star.png|none|thumb|90x90px]]
The star grain has a core in the shape of a star. The grain burns on the core surface as well as the ends, and the ends can be inhibited. A star grain can be used to get a neutral burn, and reduce the amount of heat transferred to the case.

== X-Core ==
[[File:Xcore.png|none|thumb|90x90px]]
An X-Core grain is similar to a star grain except the core is in the shape of an X instead of a star. Its primary advantage is ease of manufacture compared to a star grain.

== Fin-o-cyl ==
[[File:Finocyl.png|none|thumb|90x90px]]
A Fin-o-cyl grain consists of a grain with a cylindrical core, like a BATES grain, but then has 'fins' added. Its advantages are similar to that of the star grain but is easier to manufacture.

== Custom Grains (BurnSim 4) ==
BurnSim 4 adds a custom grain shape editor for cores that don't fit any of the standard types above - you can sketch a shape directly, or import one from a DXF, SVG, or raster image. The custom shape is still simulated through the same pixel-based eroder used for every other grain type.

[[Category:BurnSim 4]]

Propellant Characterization

2026-08-10T17:11:32Z

Maintenance script:

In order to simulate a motor in BurnSim you need your propellant's characterization numbers. This consists of 4 things. Propellant density, C* / ISP*, Burn Rate Exponent (n) and Burn Rate Coefficient (a). Propellant density and C* / ISP* can be determined through [[ProPep]] software.

To get the burn rate exponent (n) and burn rate coefficient (a) you need test data. Specifically, several burn rate / pressure data points. IE, at what rate does the propellant burn at various chamber pressures. A minimum of 3 data points must be used, more is better. The test data can be acquired through the use of a test motor. The design I use is a simple motor that uses 4" diameter end burning grains with interchangeable nozzles and a pressure transducer.

[[File:4" end burning test motor.jpg|thumb|alt=Characterization test motor, end burning config.|Characterization test motor, end burning config. Note the ports in the top bulkhead for interchangeable nozzles and a pressure transducer.]]

[[Characterization_Motor]]

You can also use a simple bates grain motor that is designed to keep the [[Kn]] as constant as possible, a strand burner, or other techniques. What is important is to get as accurate as possible data points.
[[File:CharacterizationGraph.png|alt=Example output of the propellant characterization spreadsheet|left|thumb|Example output of the propellant characterization spreadsheet]]
Once you have those data points there are several options for getting your Burn Rate Exponent and Coefficent. I use a [http://www.blastzone.org/characterization/characterization.xls spreadsheet in Microsoft Excel]. The spreadsheet uses some advanced features in Excel to match the data points to a curve and provided the necessary values. Some versions of [[ProPep]] will also do this data crunching for you.

== In BurnSim 4 ==
BurnSim 4 doesn't yet have an automated characterization tool that fits a/n directly from imported test data - you still need the spreadsheet or ProPep approach above. Once you have candidate values, the [[Test Data Tab|Test Data tab]] lets you import your test points and overlay them against a simulation using those values, so you can visually check the fit (or refine by eye) without leaving BurnSim.

[[Category:BurnSim 4]]

Import from CSV

2026-08-10T17:11:31Z

Maintenance script:

To import test data into BurnSim from a CSV (Comma Delimited text file) it must be in this format

Time, Pressure, Thrust

Thrust data is optional and can be excluded. A sample data file snippet is given below for an example, which includes only time and pressure data. If thrust data is available, it should be included as a 3rd column in the file.

0,0.00
0.008,7.40
0.017,12.34
0.025,22.20
0.033,32.07
0.042,46.88
...

In BurnSim 4, use '''Import File...''' on the [[Test Data Tab|Test Data tab]] to load a CSV in this format; '''Import Clipboard''' accepts the same three columns pasted directly from a spreadsheet.

[[Category:BurnSim 4]]

Test Data Tab

2026-08-10T17:10:16Z

Maintenance script:

The '''Test Data''' tab (next to Results and Notes, bottom right of the main window) lets you bring real motor-test data into BurnSim and compare it against a simulation.

[[File:BurnSim4TestDataTab.png|900px|thumb|center|alt=BurnSim 4 Test Data tab with imported data|Test data imported and overlaid on the simulated curves]]

== Importing ==
* '''Import File...''' - import a CSV file; see [[Import from CSV]] for the required format
* '''Import Clipboard''' - paste data copied from a spreadsheet directly, in the same Time/Pressure/Thrust column order
* Each import becomes a named dataset, selectable from the dropdown at the top of the tab; '''Delete''' removes the selected one

== Working with a Dataset ==
* '''Use in simulation''' - when checked, the dataset's pressure/thrust traces are drawn on the graph alongside the simulated ones, so you can see how closely the simulation matches reality
* The grid below is a live, editable view of the dataset's raw points - edit a cell, or use '''Add Row''' / '''Delete Row''' to fix bad points
* '''Trim...''' - cut the dataset down to just the burn itself, discarding leading/trailing zeros or noise

== On the Graph ==
With a dataset checked "Use in simulation", three extra checkboxes appear above the graph (see [[BurnSim Fields#Graph|Graph]]):
* '''Imported Pressure''' - the dataset's raw pressure trace
* '''Imported Thrust''' - the dataset's raw thrust trace, if it has one
* '''Thrust From Imported Pc''' - thrust back-calculated from the imported pressure trace through the motor's actual nozzle, useful when your test data only recorded pressure

== Characterizing a Propellant from Test Data ==
BurnSim 4 does not yet have BurnSim 3's dedicated automated characterization tool (the one that grid-searches for a best-fit burn rate exponent/coefficient against test data directly). For now, this tab is still useful for characterization work: import your test points, overlay them against a simulation using a candidate a/n, and adjust by eye until the traces line up. For deriving a/n from a set of burn-rate/pressure data points directly, see [[Propellant Characterization]].

[[Category:BurnSim 4]]

Getting Started with a Basic Simulation

2026-08-10T17:10:13Z

Maintenance script:

This walks through building a simple two-grain 54mm motor from scratch. For what each field on screen does, see [[BurnSim Fields]].

== Start a New Motor ==
Open BurnSim and choose '''File > New''' (or just start with the window BurnSim opens with). You'll see an empty Grains grid, a Motor & Nozzle panel with zeroed fields, and an empty graph:

[[File:BurnSim4NewMotor.png|900px|thumb|center|alt=BurnSim 4 with a new, empty motor|A new, empty motor]]

== Add the Grains ==
In the '''Grain Editor''' (below the grid), leave Type as '''BATES''' and pick a propellant from the '''Propellant''' dropdown - this example uses "Viper". Enter:
* Length (in): '''12.5'''
* Diameter (in): '''1.825'''
* Core dia (in): '''0.625'''
* Ends inhib.: '''0'''

Click '''Add'''. A grain appears in the grid above. Click '''Add''' again with the same values to add a second, identical grain - this motor uses two 12.5" BATES grains stacked end to end, 25" of propellant overall.

== Set the Nozzle ==
In '''Motor & Nozzle''', enter:
* Throat dia (in): '''0.75'''
* Exit dia (in): '''3.5'''
* Efficiency (%): '''85'''
* Ambient (psi): '''14.7'''
* Thrust method: '''Nozzle geometry'''

As soon as a valid throat diameter is set, BurnSim simulates automatically (this is the ''Auto-Simulate on Changes'' setting, on by default - see [[BurnSim Fields#Settings Menu|Settings Menu]]). You don't need to click anything to run it.

== Read the Results ==
[[File:BurnSim4MainWindow.png|900px|thumb|center|alt=BurnSim 4 showing the simulated two-grain motor|The simulated motor - grains, cross-section, graph and results]]

The graph (bottom left) plots Kn, pressure and thrust against time. The '''Results''' tab (bottom right) summarizes the burn - designation, total impulse, burn time, peak pressure/thrust, delivered Isp, and more.

This particular motor also shows a warning:
[Warning] The bottom grain's core is narrower than the nozzle throat (port/throat area ratio 0.69), so the core diameter is being used as the effective throat area instead of the nozzle's - this will continue until burning widens the core past the nozzle's throat diameter.
BurnSim surfaces warnings like this rather than silently simulating a physically questionable design - worth reading whenever one appears.

== From Here ==
* Add more grains, change grain types (see [[Grain Types]]), or try different propellants and nozzle sizes, watching the results update live
* Toggle which traces are plotted with the checkboxes above the graph
* '''File > Save''' (Ctrl+S) to keep the motor as a .bsx file
* Once you have real test data for this motor, see [[Test Data Tab]] to bring it in and compare against the simulation

[[Category:BurnSim 4]]

BurnSim Fields

2026-08-10T17:10:12Z

Maintenance script:

This is a field-by-field reference for BurnSim 4's main window. For a walkthrough of building your first motor, see [[Getting Started with a Basic Simulation]].

[[File:BurnSim4MainWindow.png|900px|thumb|center|alt=BurnSim 4 main window|BurnSim 4's main window - grains and graph on the left, motor/nozzle and propellant on the right]]

== File Menu ==
* '''New''' (Ctrl+N) - start a new, empty motor
* '''Open...''' (Ctrl+O) - open a saved .bsx motor file
* '''Recent Files''' - the last few motors you've opened
* '''Save''' (Ctrl+S) / '''Save As...''' - save the current motor to a .bsx file
* '''Export ENG...''' - export the burn to a .eng file for use in flight simulators
* '''Export CSV...''' - export the full simulation trace (time, Kn, pressure, thrust, mass flux, etc.) to CSV
* '''Print / Report...''' (Ctrl+P) - generate a PDF motor report

== Action Menu ==
* '''Simulate''' (F5) - run the simulation now. Usually not needed - see Auto-Simulate below.

== Settings Menu ==
* '''Auto-Simulate on Changes''' - when on (the default), BurnSim re-runs the simulation automatically as you edit grain, nozzle, or propellant fields
* '''Log Activity for Bug Reports''' - writes a per-run activity log; use ''Open Log Folder...'' to find it if you need to attach one to a bug report
* '''Use Eroder for Surface Area''' - on (default): surface area is computed from the pixel-based grain eroder, which correctly handles complex or irregular cores. Off: use the older analytic geometry formulas instead
* '''Simulate Grain in Axial Slices (Erosive Burning)''' - off by default. When on, each grain is divided into axial slices and burn rate is locally augmented by an erosive burning model reacting to mass flux down the port - see [[#Erosive Burning Overrides|Erosive Burning Overrides]] below
* '''Set Slice Count...''' - how many axial slices each grain is divided into when the above is on. More slices resolve a tapered port or burn-through more finely, at the cost of simulation speed
* '''Erosive Burning Model''' - which correlation the sliced simulation uses:
** '''Lenoir-Robillard''' - the model motor designers traditionally fit test data with. Needs a per-propellant blowing coefficient (beta) and derives its heat-transfer coefficient from thermochemistry, so the propellant needs its Molar Mass set. Always augments to some degree, with no threshold
** '''Mukunda-Paul''' - a universal correlation fit against a broad set of published test data, with no per-propellant constant to characterize - it needs nothing beyond a/n/density plus gas viscosity. Has a hard threshold: below it, there's no augmentation at all
* '''Theme''' - Dark or Light
* '''Units''' - Imperial (in, psi, lbf, lbm) or Metric (mm, kPa, N, g); ''Always show Total Impulse in N-sec'' overrides just that one Results line regardless of the Imperial/Metric choice, since motor-class designations ("H128" etc.) are always in Newton-seconds

== Help Menu ==
* '''Activate...''' - enter or check your license
* '''About...''' - version info and license terms

== Grains Grid ==
One row per grain in the motor, in burn order. Columns are Type, Length, Dia, Core, Offset, Fin len, Pts, Inhib. (number of inhibited ends, 0-2), and Propellant - which fields apply depends on the grain [[Grain Types|type]] selected. Click ''add a grain'' or use the Grain Editor below to add one; select a row to edit it.

== Grain Editor ==
Below the grid, an editor for the selected grain(s):
* '''Add''' - adds a new grain with the fields below
* '''Remove''' - deletes the selected grain(s)
* '''Up''' / '''Down''' - reorders the selected grain within the motor
* '''Select All''' - selects every grain, so a field change and ''Apply'' updates them all at once
* '''Apply''' - writes the Type/Length/Diameter/Core dia/Ends inhib./Propellant fields back to the selected grain(s)

Grid cells can also be edited directly, without going through this editor.

Below the editor, a '''Cross-Section''' preview shows the selected grain's end view (left) and the whole motor's longitudinal cutaway (right). The slider and Play button scrub through the burn, animating how the grain erodes over time using the same pixel-based eroder that drives the simulation.

== Motor and Nozzle ==
* '''Throat dia (in)''' / '''Exit dia (in)''' - nozzle throat and exit diameters
* '''Efficiency (%)''' - combustion/nozzle efficiency applied to the theoretical performance
* '''Ambient (psi)''' - ambient pressure the motor fires into
* '''Thrust method''' - how thrust is derived; ''Nozzle geometry'' computes it from the throat/exit dimensions above

== Propellant ==
* Dropdown selects which propellant in your database applies to the currently-selected grain(s); '''New''', '''Edit''', '''Save As...''' and '''Delete''' manage the database itself
* '''Name''', '''Density (lb/in^3)''', '''C* (ft/sec)''', '''Specific heat ratio''', '''a''' and '''n''' (the Saint-Robert's law burn rate coefficient and exponent), and '''Molar mass (g/mol)''' are the propellant's characterization numbers - see [[Propellant Characterization]] for how to derive them. Fields are read-only until you click ''New'' or ''Edit''

=== Erosive Burning Overrides ===
Only relevant when ''Simulate Grain in Axial Slices'' is on (see [[#Settings Menu|Settings Menu]] above). Each box is optional - leave it blank and BurnSim derives a value from the propellant's other properties (the small gray text under each box always shows what value is actually in effect, derived or overridden):
* '''Beta''' - blowing coefficient (Lenoir-Robillard only)
* '''Viscosity (mu)''' - combustion gas viscosity
* '''Prandtl''' - Prandtl number of the combustion gas
* '''Surface temp (R)''' - propellant surface temperature
* '''Solid heat capacity (cs)''' - propellant solid-phase heat capacity
* '''Combustion temp (R)''' - adiabatic flame/combustion temperature

== Graph ==
Checkboxes above the graph toggle which traces are plotted against time: Kn, Kn Eff, Pressure, Thrust, Mass Flux, Mass Flow. When test data has been imported and marked "Use in simulation" (see [[Test Data Tab]]), three more become available: Imported Pressure, Imported Thrust, and Thrust From Imported Pc (thrust back-calculated from the imported pressure trace via the nozzle) - letting you overlay real test data against the simulated curves.

== Results, Test Data and Notes Tabs ==
* '''Results''' - a text summary of the burn: designation, total impulse, burn time, peak pressure/thrust, delivered Isp, Kn max/min, web thickness, propellant mass and length, initial core volume, peak mass flux/flow - plus any warnings BurnSim generated about the design (for example, a core narrower than the nozzle throat)
* '''Test Data''' - import, edit and manage real motor-test data; see [[Test Data Tab]]
* '''Notes''' - free-text notes, saved with the .bsx file

[[Category:BurnSim 4]]

Main Page

2026-08-10T17:10:09Z

Maintenance script:

BurnSim is free software for simulating solid rocket motors, built to be as simple to use as possible while staying accurate for real motor designs. This wiki documents '''BurnSim 4''', the current cross-platform (Windows, Mac, Linux) rewrite of BurnSim, and covers general topics related to experimental solid propellant motors: propellant characterization, motor testing, data acquisition, and more.

Still running BurnSim 3? Its interface differs substantially from what's shown below - see the [[:Category:BurnSim 3 (Legacy)|BurnSim 3 documentation]] instead.

For questions about BurnSim itself, see [https://burnsim.com/contact.asp contact me].

== The Main Window ==
Hover over or click on parts of the window below for more detail on each area.

<imagemap>
File:BurnSim4MainWindow.png|900px|alt=BurnSim 4 main window
default [[Main Page|Go to main page]]
rect 6 4 49 26 [[BurnSim Fields#File Menu|File Menu]]
rect 58 4 113 26 [[BurnSim Fields#Action Menu|Action Menu]]
rect 119 4 179 26 [[BurnSim Fields#Settings Menu|Settings Menu]]
rect 187 4 230 26 [[BurnSim Fields#Help Menu|Help Menu]]
rect 6 36 1786 192 [[Grain Types|Grains grid - one row per grain in the motor]]
rect 6 378 1786 781 [[BurnSim Fields#Grain Editor|Grain Editor and grain cross-section preview]]
rect 6 826 1786 1325 [[BurnSim Fields#Graph|Simulation graph - Kn, pressure, thrust, mass flux/flow]]
rect 1792 36 2554 186 [[BurnSim Fields#Motor and Nozzle|Motor and Nozzle geometry]]
rect 1792 209 2554 429 [[Propellant Characterization|Propellant - the selected grain's propellant and its characterization numbers]]
rect 1792 442 2554 657 [[BurnSim Fields#Erosive Burning Overrides|Erosive burning overrides]]
rect 1792 672 2554 1325 [[Test Data Tab|Results, Test Data and Notes tabs]]
</imagemap>

== Getting Started ==
New to BurnSim? Start with [[Getting Started with a Basic Simulation]].

== Topics ==
* [[BurnSim Fields]] - full field-by-field reference for the main window
* [[Grain Types]] - the available grain geometries
* [[Propellant Characterization]] - getting the numbers BurnSim needs for a propellant
* [[Characterization Motor]] - a simple test motor for gathering burn-rate data
* [[Data Acquisition]] - instrumenting a motor test
* [[Test Data Tab]] and [[Import from CSV]] - bringing real test data into BurnSim

[[Category:BurnSim 4]]

BurnSim 3/BurnSim Fields

2026-08-10T17:04:26Z

Maintenance script:

BurnSim 3/Propellants Tab

2026-08-10T17:04:25Z

Maintenance script:

'''This page documents BurnSim 3.''' See [[Main Page]] for current BurnSim 4 documentation. This page is kept for reference by users still running BurnSim 3.

Hover over or click on various fields in the image below to get more details on each field.

<imagemap>
File:BurnSimPropellantsTab.png|700px|alt=BurnSim Main Window
default [[Main Page|Go to main page]]
rect 1050 161 1481 193 [[Propellant Name|Name of the propellant]]
rect 1061 209 1215 236 [[Propellant Standard Properties|Common propellant properties, including characterization numbers]]
rect 1226 209 1428 233 [[Propellant Pressure Varied Properties|Here you can specify propellant properties based on chamber pressure. For some propellants, properties change with chamber pressure]]
rect 1440 213 1490 235 [[Notes|Propellant Notes]]
rect 1060 244 1358 278 [[C Star|C* or Characteristic Exhaust Velocity. This can be calculated in ProPep]]
rect 1062 279 1355 310 [[Characteristic ISP|Characteristic ISP is simply another representation of C*, above]]
rect 1065 312 1281 344 [[Burn Rate Coefficient|Burn Rate Coefficient (A)]]
rect 1069 353 1278 389 [[Burn Rate Exponent|Burn Rate Coefficient (N)]]
rect 1069 388 1360 412 [[Propellant Density|Propellant Density, measured or theoretical from ProPep]]
rect 1364 247 1574 276 [[Specific Heat Ratio|Specific Heat Ratio is currently not required, will be used for Startup Transient Simulation in the future]]
rect 1364 278 1577 310 [[Molar Mass|Molar Mass is currently not required, will be used for Startup Transient Simulation in the future]]
rect 1196 486 1269 528 [[New Propellant|Click this button to add a new propellant]]
rect 1279 488 1354 526 [[Edit Propellant|Click this button to edit selected propellant]]
rect 1358 490 1444 522 [[Delete Propellant|Click this button to delete the selected propellant]]
rect 2 46 54 76 [[FileMenu|File Menu]]
rect 57 47 118 75 [[ActionMenu|Action Menu]]
rect 126 49 202 74 [[SettingsMenu|Settings Menu]]
rect 206 47 269 77 [[ViewMenu|View Menu]]
rect 272 49 317 75 [[HelpMenu|Help Menu]]
rect 18 136 316 171 [[Grain Types|Grain Type for specified/highlighted grains]]
rect 20 174 317 213 [[Propellant|Propellant for specified grain selected from propellant database]]
rect 18 221 315 262 [[Grain Length|Grain Length]]
rect 20 264 314 297 [[Grain Diameter|Grain Diameter]]
rect 13 302 315 331 [[Grain Core Diameter|Grain Core Diameter]]
rect 20 337 309 372 [[Grain Core Offset|Core Offset, Fin Thickness, etc - this field will change depending on the type of grain selected]]
rect 19 378 313 413 [[Number of Fins|Number Of Points when a star grain is selected - this field will change depending on the type of grain selected Number Of Points when a star grain is selected - this field will change depending on the type of grain selected]]
rect 24 418 310 454 [[Fin Length|Fin Length for finocyl grains - this field will change depending on the type of grain selected]]
rect 18 453 312 494 [[Inhibited Ends|Inhibited Ends - select the number of inhibited ends for the grain(s). Can be 0-2.]]
rect 20 502 94 535 [[Add Grain|Add Grain - this button adds a grain with the specified properties]]
rect 98 500 174 531 [[Delete Grain|Delete Grain - this button will delete any grains selected in the grid]]
rect 181 501 252 538 [[Apply Grain Changes|Update Grain - this button will update any grains selected in the grid with the properties specified.]]
rect 265 502 310 532 [[Move Grain Up|Grain Up - moves the grain up in the motor]]
rect 314 502 389 534 [[Move Grain Down|Grain Down - moves the grain down in the motor]]
rect 324 138 747 491 [[Grain Table|Displayes motor grains and properties]]
rect 760 139 1016 395 [[Grain Cross Section|Image of the selected grain cross section]]
rect 779 440 1004 493 [[Motor Cross Section|Future feature where a longitudinal cross section of the motor will be displayed]]
rect 1 83 42 116 [[Open File|Open a BSX File]]
rect 47 79 83 118 [[New Motor|Start a new motor simulation]]
rect 88 79 128 118 [[Save File|Save current motor disk]]
rect 136 80 172 117 [[ENG Export|Export current motor to ENG file for use in flight simulators]]
rect 178 81 219 116 [[CSV Export|Export current motor data to CSV for consumption in other applications]]
rect 228 81 269 118 [[Run Simulation|Run simulation]]
rect 1045 124 1167 153 [[Main_Page|Enter this tab for nozzle properties]]
rect 1185 131 1268 154 [[Propellants Tab|Enter this tab for editing propellants]]
rect 1276 131 1337 154 [[Startup Tab|Options for startup transients. Not currently implemented]]
rect 1418 167 1504 203 [[Area Button|Not yet implemented]]
rect 1054 614 1145 641 [[Main_Page|Enter here to view simulation results summary]]
rect 1157 613 1251 637 [[Graph Lines Tab|Enter here to modify colors and turn graph lines on/off]]
rect 1266 614 1343 640 [[Test Data Tab|Enter here to import test data and view previously imported test data]]
rect 1058 652 1309 727 [[Kn Values|Kn values from the simulation. Kn = ratio of propellant surface area to nozzle throat area]]
rect 1058 731 1310 754 [[Volume Loading|Volume loading percentage of propellant in given motor cylinder volume]]
rect 1060 756 1308 782 [[Port Throat Area Ratio|Ratio of the bottom grain core diameter to the nozzle throat diameter]]
rect 1055 786 1304 804 [[Throat Port Area Ratio|Ratio of the nozzle throat diameter to the bottom grain core diameter]]
rect 1056 810 1300 829 [[Length Diameter Ratio|Ratio of propellant core length to diameter]]
rect 1057 830 1299 855 [[Web Thickness|Minimum thickness of propellant]]
rect 1322 652 1586 676 [[Burn Time|Simulated motor burn time]]
rect 1323 678 1587 701 [[Propellant Length|Length of all motor grains from top to bottom]]
rect 1326 702 1582 726 [[Propellant Mass|Total mass of propellant before burnt]]
rect 1322 728 1581 750 [[Total Impuse|Simulated total impuse]]
rect 1322 758 1589 775 [[Motor Class|Simulated motor Class Designation]]
rect 1326 779 1587 793 [[Delivered ISP|Simulated Delivered ISP]]
rect 1323 805 1598 835 [[Peak Mass Flux|Simulated peak max flux of current motor]]
rect 44 951 286 982 [[X Axis Start|Specify start value for X axis, useful for zooming in on specific parts of the burn]]
rect 320 954 562 980 [[X Axis End|Specify end value for X axis, useful for zooming in on specific parts of the burn]]
rect 648 947 954 987 [[End Sim Percentage|For motors with a long tail-off, can specify a % of max thrust to designate motor burnout and end the simulation]]
rect 23 597 1023 941 [[Results Graph|Simulation Results are displayed here]]
rect 21 561 75 583 [[Graph Tab|Enter here to view simulation graph]]
rect 86 562 134 585 [[Notes Tab|Notes tab for recording notes on a motor. Will be saved with the motor.]]
</imagemap>
[[Category:BurnSim 3 (Legacy)]]

BurnSim 3/Graph Lines Tab

2026-08-10T17:04:23Z

Maintenance script:

'''This page documents BurnSim 3.''' See [[Main Page]] for current BurnSim 4 documentation. This page is kept for reference by users still running BurnSim 3.

Hover over or click on various fields in the image below to get more details on each field.

<imagemap>
File:BurnSimGraphLinesTab.png|700px|alt=BurnSim Main Window
default [[Main Page|Go to main page]]
rect 1050 161 1481 193 [[Propellant Name|Name of the propellant]]
rect 1061 209 1215 236 [[Propellant Standard Properties|Common propellant properties, including characterization numbers]]
rect 1226 209 1428 233 [[Propellant Pressure Varied Properties|Here you can specify propellant properties based on chamber pressure. For some propellants, properties change with chamber pressure]]
rect 1440 213 1490 235 [[Notes|Propellant Notes]]
rect 1060 244 1358 278 [[C Star|C* or Characteristic Exhaust Velocity. This can be calculated in ProPep]]
rect 1062 279 1355 310 [[Characteristic ISP|Characteristic ISP is simply another representation of C*, above]]
rect 1065 312 1281 344 [[Burn Rate Coefficient|Burn Rate Coefficient (A)]]
rect 1069 353 1278 389 [[Burn Rate Exponent|Burn Rate Coefficient (N)]]
rect 1069 388 1360 412 [[Propellant Density|Propellant Density, measured or theoretical from ProPep]]
rect 1364 247 1574 276 [[Specific Heat Ratio|Specific Heat Ratio is currently not required, will be used for Startup Transient Simulation in the future]]
rect 1364 278 1577 310 [[Molar Mass|Molar Mass is currently not required, will be used for Startup Transient Simulation in the future]]
rect 1196 486 1269 528 [[New Propellant|Click this button to add a new propellant]]
rect 1279 488 1354 526 [[Edit Propellant|Click this button to edit selected propellant]]
rect 1358 490 1444 522 [[Delete Propellant|Click this button to delete the selected propellant]]
rect 2 46 54 76 [[FileMenu|File Menu]]
rect 57 47 118 75 [[ActionMenu|Action Menu]]
rect 126 49 202 74 [[SettingsMenu|Settings Menu]]
rect 206 47 269 77 [[ViewMenu|View Menu]]
rect 272 49 317 75 [[HelpMenu|Help Menu]]
rect 18 136 316 171 [[Grain Types|Grain Type for specified/highlighted grains]]
rect 20 174 317 213 [[Propellant|Propellant for specified grain selected from propellant database]]
rect 18 221 315 262 [[Grain Length|Grain Length]]
rect 20 264 314 297 [[Grain Diameter|Grain Diameter]]
rect 13 302 315 331 [[Grain Core Diameter|Grain Core Diameter]]
rect 20 337 309 372 [[Grain Core Offset|Core Offset, Fin Thickness, etc - this field will change depending on the type of grain selected]]
rect 19 378 313 413 [[Number of Fins|Number Of Points when a star grain is selected - this field will change depending on the type of grain selected Number Of Points when a star grain is selected - this field will change depending on the type of grain selected]]
rect 24 418 310 454 [[Fin Length|Fin Length for finocyl grains - this field will change depending on the type of grain selected]]
rect 18 453 312 494 [[Inhibited Ends|Inhibited Ends - select the number of inhibited ends for the grain(s). Can be 0-2.]]
rect 20 502 94 535 [[Add Grain|Add Grain - this button adds a grain with the specified properties]]
rect 98 500 174 531 [[Delete Grain|Delete Grain - this button will delete any grains selected in the grid]]
rect 181 501 252 538 [[Apply Grain Changes|Update Grain - this button will update any grains selected in the grid with the properties specified.]]
rect 265 502 310 532 [[Move Grain Up|Grain Up - moves the grain up in the motor]]
rect 314 502 389 534 [[Move Grain Down|Grain Down - moves the grain down in the motor]]
rect 324 138 747 491 [[Grain Table|Displayes motor grains and properties]]
rect 760 139 1016 395 [[Grain Cross Section|Image of the selected grain cross section]]
rect 779 440 1004 493 [[Motor Cross Section|Future feature where a longitudinal cross section of the motor will be displayed]]
rect 1 83 42 116 [[Open File|Open a BSX File]]
rect 47 79 83 118 [[New Motor|Start a new motor simulation]]
rect 88 79 128 118 [[Save File|Save current motor disk]]
rect 136 80 172 117 [[ENG Export|Export current motor to ENG file for use in flight simulators]]
rect 178 81 219 116 [[CSV Export|Export current motor data to CSV for consumption in other applications]]
rect 228 81 269 118 [[Run Simulation|Run simulation]]
rect 1045 124 1167 153 [[Main_Page|Enter this tab for nozzle properties]]
rect 1185 131 1268 154 [[Propellants Tab|Enter this tab for editing propellants]]
rect 1276 131 1337 154 [[Startup Tab|Options for startup transients. Not currently implemented]]
rect 1418 167 1504 203 [[Area Button|Not yet implemented]]
rect 1054 614 1145 641 [[Main_Page|Enter here to view simulation results summary]]
rect 1157 613 1251 637 [[Graph Lines Tab|Enter here to modify colors and turn graph lines on/off]]
rect 1266 614 1343 640 [[Test Data Tab|Enter here to import test data and view previously imported test data]]
rect 1061 649 1173 677 [[Kn Graph Line|]]
rect 1060 682 1239 710 [[Chamber Pressure Graph Line|]]
rect 1059 712 1276 745 [[Imported Chamber Pressure Graph Line|]]
rect 1060 749 1216 775 [[Thrust Graph Line|]]
rect 1064 778 1323 805 [[Imported Thrust Graph Line|]]
rect 1064 812 1320 845 [[Mass Flux Graph Line|]]
rect 1063 844 1320 882 [[Mass Flow Graph Line|]]
rect 44 951 286 982 [[X Axis Start|Specify start value for X axis, useful for zooming in on specific parts of the burn]]
rect 320 954 562 980 [[X Axis End|Specify end value for X axis, useful for zooming in on specific parts of the burn]]
rect 648 947 954 987 [[End Sim Percentage|For motors with a long tail-off, can specify a % of max thrust to designate motor burnout and end the simulation]]
rect 23 597 1023 941 [[Results Graph|Simulation Results are displayed here]]
rect 21 561 75 583 [[Graph Tab|Enter here to view simulation graph]]
rect 86 562 134 585 [[Notes Tab|Notes tab for recording notes on a motor. Will be saved with the motor.]]
</imagemap>
[[Category:BurnSim 3 (Legacy)]]

BurnSim 3/Main Page

2026-08-10T17:04:22Z

Maintenance script:

'''This page documents BurnSim 3.''' See [[Main Page]] for current BurnSim 4 documentation. This page is kept for reference by users still running BurnSim 3.

Welcome to the BurnSim Wiki! Here you will find the current documentation on how to use the [https://BurnSim.com BurnSim] software as well as other subjects related to Experimental Solid propellants including Propellant Characterization, Motor Testing and Data Aquisition, and more!

Hover over or click on various fields in the image below to get more details on each field in BurnSim.

<imagemap>
File:BurnSimMain.png|700px|alt=BurnSim Main Window
default [[Main Page|Go to main page]]
rect 2 46 54 76 [[FileMenu|File Menu]]
rect 57 47 118 75 [[ActionMenu|Action Menu]]
rect 126 49 202 74 [[SettingsMenu|Settings Menu]]
rect 206 47 269 77 [[ViewMenu|View Menu]]
rect 272 49 317 75 [[HelpMenu|Help Menu]]
rect 18 136 316 171 [[Grain Types|Grain Type for specified/highlighted grains]]
rect 20 174 317 213 [[Propellant|Propellant for specified grain selected from propellant database]]
rect 18 221 315 262 [[Grain Length|Grain Length]]
rect 20 264 314 297 [[Grain Diameter|Grain Diameter]]
rect 13 302 315 331 [[Grain Core Diameter|Grain Core Diameter]]
rect 20 337 309 372 [[Grain Core Offset|Core Offset, Fin Thickness, etc - this field will change depending on the type of grain selected]]
rect 19 378 313 413 [[Number of Fins|Number Of Points when a star grain is selected - this field will change depending on the type of grain selected Number Of Points when a star grain is selected - this field will change depending on the type of grain selected]]
rect 24 418 310 454 [[Fin Length|Fin Length for finocyl grains - this field will change depending on the type of grain selected]]
rect 18 453 312 494 [[Inhibited Ends|Inhibited Ends - select the number of inhibited ends for the grain(s). Can be 0-2.]]
rect 20 502 94 535 [[Add Grain|Add Grain - this button adds a grain with the specified properties]]
rect 98 500 174 531 [[Delete Grain|Delete Grain - this button will delete any grains selected in the grid]]
rect 181 501 252 538 [[Apply Grain Changes|Update Grain - this button will update any grains selected in the grid with the properties specified.]]
rect 265 502 310 532 [[Move Grain Up|Grain Up - moves the grain up in the motor]]
rect 314 502 389 534 [[Move Grain Down|Grain Down - moves the grain down in the motor]]
rect 324 138 747 491 [[Grain Table|Displayes motor grains and properties]]
rect 760 139 1016 395 [[Grain Cross Section|Image of the selected grain cross section]]
rect 779 440 1004 493 [[Motor Cross Section|Future feature where a longitudinal cross section of the motor will be displayed]]
rect 1 83 42 116 [[Open File|Open a BSX File]]
rect 47 79 83 118 [[New Motor|Start a new motor simulation]]
rect 88 79 128 118 [[Save File|Save current motor disk]]
rect 136 80 172 117 [[ENG Export|Export current motor to ENG file for use in flight simulators]]
rect 178 81 219 116 [[CSV Export|Export current motor data to CSV for consumption in other applications]]
rect 228 81 269 118 [[Run Simulation|Run simulation]]
rect 271 80 308 116 [[Nozzle Optimization|Clicking this button will run multiple simulations to find the optimum (highest thrust) nozzle dimensions given the nozzle throat diameter.]]
rect 1045 124 1167 153 [[Main_Page|Enter this tab for nozzle properties]]
rect 1185 131 1268 154 [[Propellants Tab|Enter this tab for editing propellants]]
rect 1276 131 1337 154 [[Startup Tab|Options for startup transients. Not currently implemented]]
rect 1418 167 1504 203 [[Area Button|Not yet implemented]]
rect 1053 166 1389 206 [[Nozzle Throat Diameter|Diameter of nozzle throat]]
rect 1050 211 1272 232 [[Use Nozzle Calculations|Use Nozzle Calculations - when selected this will calculate thrust coefficient based on nozzle dimensions]]
rect 1053 242 1400 270 [[Nozzle Exit Diameter|Exit Diameter of the nozzle]]
rect 1055 276 1388 317 [[Nozzle Expansion Ratio|Expansion Ratio of the nozzle]]
rect 1057 320 1388 356 [[Ambient Pressure|Ambient atmospheric pressure]]
rect 1058 359 1388 393 [[Nozzle Efficiency|Efficiency - Thrust calculations are based on ideal conditions which are not normally encountered in real life. Select a value here like 90% as needed.]]
rect 1054 399 1393 428 [[Nozzle Diameter Erosion|Nozzle Erosion - Erosion of the nozzle throat diameter over time]]
rect 1052 441 1330 511 [[Use Thrust Coefficient|Thrust Coefficient - Specify this if you wish to use a given thrust coefficient for thrust calculations instead of calculating from nozzle dimensions.]]
rect 1054 614 1145 641 [[Sim Results Tab|Enter here to view simulation results summary]]
rect 1157 613 1251 637 [[Graph Lines Tab|Enter here to modify colors and turn graph lines on/off]]
rect 1266 614 1343 640 [[Test Data Tab|Enter here to import test data and view previously imported test data]]
rect 1058 652 1309 727 [[Kn Values|Kn values from the simulation. Kn = ratio of propellant surface area to nozzle throat area]]
rect 1058 731 1310 754 [[Volume Loading|Volume loading percentage of propellant in given motor cylinder volume]]
rect 1060 756 1308 782 [[Port Throat Area Ratio|Ratio of the bottom grain core diameter to the nozzle throat diameter]]
rect 1055 786 1304 804 [[Throat Port Area Ratio|Ratio of the nozzle throat diameter to the bottom grain core diameter]]
rect 1056 810 1300 829 [[Length Diameter Ratio|Ratio of propellant core length to diameter]]
rect 1057 830 1299 855 [[Web Thickness|Minimum thickness of propellant]]
rect 1322 652 1586 676 [[Burn Time|Simulated motor burn time]]
rect 1323 678 1587 701 [[Propellant Length|Length of all motor grains from top to bottom]]
rect 1326 702 1582 726 [[Propellant Mass|Total mass of propellant before burnt]]
rect 1322 728 1581 750 [[Total Impuse|Simulated total impuse]]
rect 1322 758 1589 775 [[Motor Class|Simulated motor Class Designation]]
rect 1326 779 1587 793 [[Delivered ISP|Simulated Delivered ISP]]
rect 1323 805 1598 835 [[Peak Mass Flux|Simulated peak max flux of current motor]]
rect 44 951 286 982 [[X Axis Start|Specify start value for X axis, useful for zooming in on specific parts of the burn]]
rect 320 954 562 980 [[X Axis End|Specify end value for X axis, useful for zooming in on specific parts of the burn]]
rect 648 947 954 987 [[End Sim Percentage|For motors with a long tail-off, can specify a % of max thrust to designate motor burnout and end the simulation]]
rect 23 597 1023 941 [[Results Graph|Simulation Results are displayed here]]
rect 21 561 75 583 [[Graph Tab|Enter here to view simulation graph]]
rect 86 562 134 585 [[Notes Tab|Notes tab for recording notes on a motor. Will be saved with the motor.]]
</imagemap>

{{#tree:
*[[Main_Page|BurnSim WIKI]]
**[[Getting Started with a Basic Simulation]]
**[[Propellant_Characterization]]
**[[Data_Acquisition]]
}}
[[Category:BurnSim 3 (Legacy)]]

BurnSim 3/Getting Started with a Basic Simulation

2026-08-10T17:04:21Z

Maintenance script:

'''This page documents BurnSim 3.''' See [[Main Page]] for current BurnSim 4 documentation. This page is kept for reference by users still running BurnSim 3.

BurnSim was created for simulating solid rocket motors, with the goal being making it as simple as possible for a user to do so while being accurate as possible given valid inputs. To get started, the first step is to open BurnSim, where you'll see the main form:

[[File:Burnsimstart.jpg]]

Next, we need to get a propellant grain or two in there. For this test, we'll simulate a 54mm BATES grain motor. To add the grain, select "BATES" from the Grain Type drop down in the upper left, then choose a propellant in the drop down below that, give a length of 3 inches, Diameter of 1.825 inches, and a core diameter of 0.5. Finally, click the 'Add' button below the grain fields and you will have a single grain added to the motor, like below.

[[File:Onegrain.jpg]]

Finally, we need to specify a nozzle throat in order to complete the motor. To do this, simply click on the field in the upper right labelled 'Nozzle Throat Dia' and enter 0.25. As you type the value in you'll notice the simulation start to run immediately. Now that there is a grain defined as well as a nozzle, BurnSim has enough data to simulate a burn.

[[File:Onegraindone.jpg]]

From this point you can add grains, change their geometry, select different propellants, modify nozzle geometry, and so on, observing the change in simulation results. Explore and enjoy!
[[Category:BurnSim 3 (Legacy)]]

BurnSim 3/Test Data Tab

2026-08-10T17:04:19Z

Maintenance script:

'''This page documents BurnSim 3.''' See [[Main Page]] for current BurnSim 4 documentation. This page is kept for reference by users still running BurnSim 3.

Hover over or click on various fields in the image below to get more details on each field.

<imagemap>
File:BurnSimTestDataTab.png|700px|alt=BurnSim Main Window
default [[Main Page|Go to main page]]
rect 1073 651 1584 706 [[Test Data Dataset|Select an already imported dataset saved to the current motor file]]
rect 1078 711 1186 752 [[Graph Test Data Checkbox|Select this box to include the selected dataset in the simulation graph]]
rect 1191 711 1345 756 [[Import from Clipboard|Import test data from clipboard]]
rect 1351 711 1494 763 [[Import from CSV|Import test data from CSV file]]
rect 1088 762 1186 816 [[Delete Test Data|Delete selected dataset]]
rect 1196 761 1288 813 [[Trim Test Data|Trim rows from selected dataset]]
rect 1092 825 1582 979 [[Imported Dataset|Display of imported dataset]]

rect 1418 167 1504 203 [[Area Button|Not yet implemented]]
rect 1053 166 1389 206 [[Nozzle Throat Diameter|Diameter of nozzle throat]]
rect 1050 211 1272 232 [[Use Nozzle Calculations|Use Nozzle Calculations - when selected this will calculate thrust coefficient based on nozzle dimensions]]
rect 1053 242 1400 270 [[Nozzle Exit Diameter|Exit Diameter of the nozzle]]
rect 1055 276 1388 317 [[Nozzle Expansion Ratio|Expansion Ratio of the nozzle]]
rect 1057 320 1388 356 [[Ambient Pressure|Ambient atmospheric pressure]]
rect 1058 359 1388 393 [[Nozzle Efficiency|Efficiency - Thrust calculations are based on ideal conditions which are not normally encountered in real life. Select a value here like 90% as needed.]]
rect 1054 399 1393 428 [[Nozzle Diameter Erosion|Nozzle Erosion - Erosion of the nozzle throat diameter over time]]
rect 1052 441 1330 511 [[Use Thrust Coefficient|Thrust Coefficient - Specify this if you wish to use a given thrust coefficient for thrust calculations instead of calculating from nozzle dimensions.]]

rect 2 46 54 76 [[FileMenu|File Menu]]
rect 57 47 118 75 [[ActionMenu|Action Menu]]
rect 126 49 202 74 [[SettingsMenu|Settings Menu]]
rect 206 47 269 77 [[ViewMenu|View Menu]]
rect 272 49 317 75 [[HelpMenu|Help Menu]]
rect 18 136 316 171 [[Grain Types|Grain Type for specified/highlighted grains]]
rect 20 174 317 213 [[Propellant|Propellant for specified grain selected from propellant database]]
rect 18 221 315 262 [[Grain Length|Grain Length]]
rect 20 264 314 297 [[Grain Diameter|Grain Diameter]]
rect 13 302 315 331 [[Grain Core Diameter|Grain Core Diameter]]
rect 20 337 309 372 [[Grain Core Offset|Core Offset, Fin Thickness, etc - this field will change depending on the type of grain selected]]
rect 19 378 313 413 [[Number of Fins|Number Of Points when a star grain is selected - this field will change depending on the type of grain selected Number Of Points when a star grain is selected - this field will change depending on the type of grain selected]]
rect 24 418 310 454 [[Fin Length|Fin Length for finocyl grains - this field will change depending on the type of grain selected]]
rect 18 453 312 494 [[Inhibited Ends|Inhibited Ends - select the number of inhibited ends for the grain(s). Can be 0-2.]]
rect 20 502 94 535 [[Add Grain|Add Grain - this button adds a grain with the specified properties]]
rect 98 500 174 531 [[Delete Grain|Delete Grain - this button will delete any grains selected in the grid]]
rect 181 501 252 538 [[Apply Grain Changes|Update Grain - this button will update any grains selected in the grid with the properties specified.]]
rect 265 502 310 532 [[Move Grain Up|Grain Up - moves the grain up in the motor]]
rect 314 502 389 534 [[Move Grain Down|Grain Down - moves the grain down in the motor]]
rect 324 138 747 491 [[Grain Table|Displayes motor grains and properties]]
rect 760 139 1016 395 [[Grain Cross Section|Image of the selected grain cross section]]
rect 779 440 1004 493 [[Motor Cross Section|Future feature where a longitudinal cross section of the motor will be displayed]]
rect 1 83 42 116 [[Open File|Open a BSX File]]
rect 47 79 83 118 [[New Motor|Start a new motor simulation]]
rect 88 79 128 118 [[Save File|Save current motor disk]]
rect 136 80 172 117 [[ENG Export|Export current motor to ENG file for use in flight simulators]]
rect 178 81 219 116 [[CSV Export|Export current motor data to CSV for consumption in other applications]]
rect 228 81 269 118 [[Run Simulation|Run simulation]]
rect 1045 124 1167 153 [[Main_Page|Enter this tab for nozzle properties]]
rect 1185 131 1268 154 [[Propellants Tab|Enter this tab for editing propellants]]
rect 1276 131 1337 154 [[Startup Tab|Options for startup transients. Not currently implemented]]
rect 1418 167 1504 203 [[Area Button|Not yet implemented]]
rect 1054 614 1145 641 [[Main_Page|Enter here to view simulation results summary]]
rect 1157 613 1251 637 [[Graph Lines Tab|Enter here to modify colors and turn graph lines on/off]]
rect 1266 614 1343 640 [[Test Data Tab|Enter here to import test data and view previously imported test data]]
rect 44 951 286 982 [[X Axis Start|Specify start value for X axis, useful for zooming in on specific parts of the burn]]
rect 320 954 562 980 [[X Axis End|Specify end value for X axis, useful for zooming in on specific parts of the burn]]
rect 648 947 954 987 [[End Sim Percentage|For motors with a long tail-off, can specify a % of max thrust to designate motor burnout and end the simulation]]
rect 23 597 1023 941 [[Results Graph|Simulation Results are displayed here]]
rect 21 561 75 583 [[Graph Tab|Enter here to view simulation graph]]
rect 86 562 134 585 [[Notes Tab|Notes tab for recording notes on a motor. Will be saved with the motor.]]
</imagemap>
[[Category:BurnSim 3 (Legacy)]]