where:

 

image\PERF0377_wmf.gif

is the aircraft landing weight.

 

image\PERF0378_wmf.gif

is the aircraft take-off weight.

 

image\PERF0379_wmf.gif

is the FAR 25.121 One Engine Inoperative climb gradient at landing requirement.

 

image\PERF0380_wmf.gif

is the drag coefficient.

 

image\PERF0381_wmf.gif

is the windmilling engine drag coefficient.

 

image\PERF0382_wmf.gif

is the lift coefficient.

 

image\PERF0383_wmf.gif

is the number of engines on the aircraft.