Hall Consulting's
Gas Gun Design Tool


Main Window Output

The main window of GGDT is horizontally divided in two regions. The upper portion contains all user gun-specific imulation input. The lower portion contains all simulation output. Obviously, this page is concerned with the lower portion.

Warnings
Let's face it, sometimes things go wrong in the simulation. GGDT tries to inform the user of any problems encountered during run-time in this text box. A problem may take the form of a warning or an error. Warnings are just that; warnings. Maybe everything is OK. Maybe the user meant for "that" to happen. In such cases, GGDT makes a note of the event and continues on. Errors are a bit more serious. Errors pop up when GGDT sees something that simply doesn't make sense in the physical world (example: a projectile with a larger diameter than the barrel bore). A listing of the possible warnings/errors and their precise meaning may be found here.

Results -> Travel Time
The travel time is defined as the time ellapsed from the moment the valve started to open and the projectile cleared the barrel's muzzle.

Results -> Pressure Drop
Nothing more than a display of the pressure drop experienced in the reservoir up to the moment the projectile clears the muzzle.

Results -> Energy Eff
The gun's energy efficiency. Or more to the point, the percentage of the energy stored in the reservoir possessed by the projectile (in the form of kinetic energy) at the moment the projectile clears the muzzle.

Results -> Muzzle Energy
The projectile's kinetic energy as it clears the muzzle.

Results -> Muzzle Velocity
The projectile's velocity as it clears the muzzle.

Plotted Data Axes -> Y Axis
The right-hand side of the output portion of the main window is dominated by a plot of simulation output data. A 16 different plots are available for viewing. The Y axis pulldown menu controls which variables are displayed on the Y axis.

Plotted Data Axe s-> X Axis
The right-hand side of the output portion of the main window is dominated by a plot of simulation output data. A 16 different plots are available for viewing. The X axis pulldown menu controls which variables are displayed on the X axis.


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