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is the propeller efficiency.
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is the aircraft lift coefficient at the given flight condition.
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is the ratio of the air density at take-off altitude and ISA temperature, to the air density at sea level, ISA.
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is a factor accounting for the number of engines on the aircraft.
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is the Military landing climb gradient requirement with gear up at 50 ft obstacle.
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is the aircraft drag coefficient at the given flight condition.
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is the aircraft lift coefficient at the given flight condition.
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is the aircraft landing weight.
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is the aircraft take-off weight.
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is the wing loading at take-off.
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