where:

 

image\PERF1132_wmf.gif

is the propeller efficiency.

 

image\PERF1133_wmf.gif

is the aircraft lift coefficient at the given flight condition.

 

image\PERF1134_wmf.gif

is the ratio of the air density at take-off altitude and ISA temperature, to the air density at sea level, ISA.

 

image\PERF1135_wmf.gif

is a factor accounting for the number of engines on the aircraft.

 

image\PERF1136_wmf.gif

is the Military landing climb gradient requirement with gear up at 50 ft obstacle.

 

image\PERF1137_wmf.gif

is the aircraft drag coefficient at the given flight condition.

 

image\PERF1138_wmf.gif

is the aircraft lift coefficient at the given flight condition.

 

image\PERF1139_wmf.gif

is the aircraft landing weight.

 

image\PERF1140_wmf.gif

is the aircraft take-off weight.

 

image\PERF1141_wmf.gif

 

is the wing loading at take-off.