Results, Test Data and Notes

The bottom-right panel of the BurnSim 4 main window carries three tabs. They share a panel but have little else in common, so pick the one you are after:

Results

The text summary BurnSim writes after each simulation, rewritten from scratch every time it runs. Any messages about the design are printed above the numbers so they cannot be missed by not scrolling, each tagged [Critical], [Warning] or [Info].

Every line it can print, in the order it prints them:

Always	Only when it applies
Designation Total impulse Burn time Peak pressure Peak thrust Avg thrust Kn max / min / avg Erosive burning Web thickness Port/throat Propellant mass Propellant length Initial free volume Peak mass flux Peak mass flow	Delivered Isp - motor has propellant Divergence loss - a divergence half-angle is set Ambient - Climbs during the burn is on CuO/Al igniter - there is burning surface to light Free-vol igniter - the motor has a core Free volume is large for this burning surface - the free-volume igniter figure overtakes the surface one

A conditional line is left out entirely when it does not apply, rather than printed as zero or "none". The panel also scrolls, and on a short window the last few lines sit below the fold - worth knowing before concluding a figure is missing.

Results Tab is the reference for all of them: what each line means, the worked numbers behind it, and the four that deliberately ignore the Imperial/Metric setting. Several have sections of their own:

• Messages - what [Critical], [Warning] and [Info] cover, and the two notes that carry no tag
• Port/throat ratio - how restrictive the aft grain's port is at ignition, the usual design targets, and what the colour bands mean
• Initial free volume - what is counted, what is not, and why the convergent cone is part of it
• Igniter mass - the two published correlations, where each was fitted, and how to read them against each other

Test Data

Import, edit and manage real measured data from a motor firing - pressure or thrust traces from a test stand. Test data can be plotted against the simulation for comparison, and is what characterization works from when deriving burn rate coefficients for a propellant.

See also Import from CSV for getting a trace out of a data logger and into BurnSim, and Data Acquisition for gathering it in the first place.

Notes

Free-text notes about the motor, saved inside the .bsx file. Anything you want to keep with the design - a load record, what you changed since the last firing, or why a field is set the way it is.