The Solid Propellant Rocket Motor Performance Computer Program SPP 5.0X^TM is the export version of the U.S. Standard SPP Code.  Both codes use the standard JANNAF methods for performance predictions of Solid Propellant Rocket Motors.  The analysis consists of two parts: nozzle performance and motor performance.  The SPP 5.0X^TM nozzle module analyzes and summarizes the performance loss mechanisms into four categories: Combustion chamber losses, Boundary Layer losses, Chemical Kinetics losses, Particle and Divergence losses.  The motor performance analysis consists of a generalized 3-D grain design module coupled to an internal ballistics module.  Several MACROs have been included to help the user specify standard shapes, such as a Star, WagonWheel, DogBone, Dendrite, Finocyl, Conocyl, etc.  These MACROs include a Domes treatment, which allows a head end or aft end taper or transition.  The grain design module is internally linked with the one-dimensional motor ballistics modules.  The motor stability can be analyzed with the axial-mode Standard Stability Prediction (SSP) code that is internally linked with the 3-D grain design and ballistic modules to define burn rates, motor surface, and port areas required by the SSP.

The SPP 5.0X^TM is fast and robust enough to provide performance predictions for extensive parametric studies and sufficiently accurate to provide flow field and performance solutions for detailed studies.  The following is a list of features and capabilities of the SPP 5.0X^TM.

• Uses the ODE (NASA LeRC CET) module to calculate ideal nozzle performance.
• Uses the ODK module to calculate the finite rate gas phase chemistry losses.
• Uses the TD2P module to calculate the divergence and particle losses.
• Uses the BLM Finite Difference Boundary Layer Module to calculate boundary layer losses.
• The axial mode SSP is linked to the 3-D Grain Design and Ballistic Module.
• Provides a post processor with color graphics, with supports PostScript and HP LaserJet hard copies.
• Wetted Perimeter Calculation, Segmented Motor, and Insulation Exposure options recently added.
• Improved user diagnostics.
• Improved print out, including auxiliary ASCII files with tabulated and summary data.  Includes both SI and EE units for input and output.
• Improved file-handling routines, which reduces disk space and keep track of results files.