Ohio State's AE graduate program, which is ranked in the top 20 nationally, is changing the way we think about flight. Our students are developing pressure-sensitive paint for aerodynamic measurements, creating the tech for distributed aircraft engine control implementation, improving the performance of supersonic aircraft, and much more. Your work at Ohio State will help you soar to new heights. There are two potential paths for students pursuing a PhD in the Aerospace Engineering graduate program: a BS-PhD path and a MS-PhD path. Students on the BS-PhD path begin work toward a Doctoral degree directly after receiving a baccalaureate degree. Students on the MS-PhD path begin work toward a Doctoral degree after receiving a master's degree. A minimum of 80 graduate credit hours beyond the baccalaureate degree, including coursework and a dissertation, are required to obtain a doctoral degree. If a student has obtained a master's degree at Ohio State or elsewhere, then a minimum of 50 graduate credit hours beyond the master's is required. The entire work for the PhD degree must be completed within a period of nine calendar years