Date of Award


Document Type

Thesis - Open Access

Degree Name

Master of Aeronautical Science


Graduate Studies

Committee Chair

Charles Richardson

Committee Member

Melville Byington Jr.

Committee Member

James Lewis


The purpose of this study was to develop optimum engine-out procedures for the Boeing 747 and 767 on extended flights that will increase the range of the aircraft in case of engine failure. Theory suggests that an optimum amount of bank angle that will minimize drag resulting from asymmetric thrust in a multiengine airplane experiencing an engine failure, can be determined. By banking the airplane into the operative engines by that optimum bank angle, the range of the airplane can be improved significantly. Wind tunnel tests of both a Boeing 747 and a 767 model were performed to determine experimentally the increase in range that can be achieved by the zero slip position. By comparing the drag force coefficient obtained at the sideslip position that occurs due to an engine failure with the drag force coefficient obtained at the wings level condition for each airplane, the amount that their specific range will increase was determined.