AeroSpike

AeroSpike performs an expansion-wave analysis from the throat of the thruster nozzle, where Mn = 1.0, to the thruster nozzle internal-exit as a series of simple wave expansions.

Then, for the external ramp AeroSpike performs a series of Prandtl-Meyer expansions from the lip of the cowl, where R=Re, to the entire length of the external ramp of the aerospike nozzle.