Preferences

Dialog window Preferences can be used to set up global configuration parameters. Click the item Help, and then Preferences in main bar to open the window.

Dialog window "Preferences"

Mark the checkbox "Clear log before start analysis" to force the cleaning the analysis log before each run, or leave it unmarked to let the log accumulate the messages from all runs.

You can define the default output units that will be used by the program to display the results of analysis, selecting either Metric system (SI) or U.S. Customary system on the list Output units.

If selected Metric system (SI), the following units will be used:

Parameter	Unit
Temperature	K (of reaction products)
Temperature	K (of propellant components)
Pressure	MPa
Specific impulse	m/s
Velocity	m/s
Mass flow rate	kg/s
Mass flux	kg/m2-s
Thrust	N, kN
Density	kg/m3
Enthalpy	kJ/kg, J/mol
Entropy, Specific heat, Gas constant	kJ/kg-K, J/mol-K

If selected U.S. Customary system, the following units will be used:

Parameter	Unit
Temperature	F (of reaction products)
Temperature	R (of propellant components)
Pressure	psi
Specific impulse	ft/s
Velocity	ft/s
Mass flow rate	lbm/s
Mass flux	lbm/ft2-s
Thrust	lbf
Density	lbm/ft3
Enthalpy	Btu/lbm, Btu/lb-mol
Entropy, Specific heat, Gas constant	Btu/lbm-R, Btu/lb-mol-R

Mark the checkbox "Check RPA website for updates" to force the program to check for available updates, or leave it unmarked to disable this function. You can also define how often should the program perform the check, selecting one of the following items on the list "Once per":

• RPA start-up
• 1 day, 1 week
• 1 month

In order to force the program to check for available updates, click the item Help, and then Check for Updates in main bar.

Last modified: September 22, 2011