OptimalFPA:

 Compute the optimal flight path angle as a function of altitude.
 The goal is a circular orbit. This script computes the optimal flight
 path angle at the time of separation after the second stage burn, to be
 on the desired transfer orbit to the final circular orbit. An angle of
 zero would indicate the perigee of a Hohmann transfer ellipse. The script
 allows for multiple burn segments with different exhaust velocities and
 thrust.

 The engines in the example are a Merlin first stage, a J-2X second stage,
 and an AJ26-58 third stage.

 The script also sizes an ellipsoid that can contain the volume of H2 and
 O2, based on the altitude with the minimum delta-V. This is needed by
 some drag models.
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  See also RHSOptimalFPA, SurfaceAreaEllipsoidRevolution
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Children:

ACPro: ACUtils/SurfaceAreaEllipsoidRevolution
Common: Atmosphere/StdAtm
Common: Database/Constant
Common: Graphics/Plot2D
LaunchVehicle: TSTO/RHSOptimalFPA