This paper evaluates the effect of alternative flight-path profiles on the scheduled takeoff performance of an existing, operational transport aircraft, the C-130H. An aircraft performance model was reverse-engineered and validated using publicly-available data. New profiles based on an extended climb in the second segment, as commonly used in civilian operations, were evaluated. These profiles improve the gradient and obstacle-clearance capability of the airplane, which increases the range and payload capability and expands the number of accessible runways. Significantly, the revised profiles take advantage of the existing capability of the airplane and require no changes to the airframe or engines. Additional options such as an extension of the time limit for takeoff power and dynamic overspeeds may incur non-recurring certification and/or development costs, but would further enhance the performance capabilities of the airplane.
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