Even at this level of idealization, our present formulation appears to economically provide much useful information about how spray combustor performance will depend on such inter-active factors as: injector (''atomizer'') performance (say, SMD and DSD spread), available chamber volume,Vch (irrespective of shape), inlet (feed) conditions (liquid phase and vapor phase),liquid fuel and oxidizer properties, overall propellant mixture ratio, .. and chamber pressure.