Open reilleya opened 5 years ago
The method given for correcting port pressure assumes that core area does not change over the length of the motor, so I'm not sure if it is appropriate for all motors oM allows users to make. Rogers does mention that section 6.5.2 of Space Propulsion Analysis describes a method for tapered cores.
Use nozzle stagnation pressure for thrust instead of chamber pressure. See figure 16 of Chuck Roger's departures from ideal performance.