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This variable convergent exhaust nozzle schedules the relative throat area to a Power Lever Angle (PLA )setting.

 

Both the ENP Ref(erence) the Nozzle rel(ative) Area schedule must be ascending. Note that this component uses a first order equation for the calculation of the ENP (Exhaust Nozzle Pressure), for which opening and closing rates can be defined.

 

ENP rate opening

F trim reset to 0 after EPR error crosses 0 +/- dead band

 

ENP rate closing

 

ENP rate time const.

 

ENP free play