antigravity

OK! I understand that it is a good idea to make sure that the new career is what I expect it would be. My university does not have engineering departments but has the basic sciences, physics, math, etc. It is a 3-3, balanced teaching research type of school. So, I can audit some of those courses. And, I guess I can pick up a few related engineering books. I guess my interest in industrial economics, international business and strategy is kind of waning, especially from a teaching perspective. I am very interested in technical things. My hobby is learning how to fly small planes, and I really like everything about aircraft design, aircraft engines, propulsion, materials etc. Since my training has already been math and stats heavy I am thinking I will be mesmerized by the study of those things. But I understand the need to confirm. The question is, assuming my suspicions regarding interest in those matters is not unfounded, how to go about it. Do I study things on my own and write a paper if I could? Do I just take entrance exams? I think some of the schools have those. Any ideas?

I am a tenured associate professor who teaches and does research in the field of strategy and international business. I enjoy research and have a successful career. But, I am faced with a dilemma. I ended up studying business as an undergraduate as a result of doing what everyone else did during those years in my country. Followed everyone else in the graduating high school class so to speak, and ended up in the top business school in that country. Graduated as valedictorian, came to US to a top school to get MBA, got the PHD in another top school. Now years later, I realize that I made a big mistake not following my dreams. I am very math and sciences oriented, and anything about airplanes, engines and such I find interesting. As a kid I grew up taking things apart and building and tinkering. As this point in my career I am toying with the idea of going back to school to some engineering PhD. But would that even be possible! Would I have to be an undergrad again! What advice do you have? Probably, I should forget this all : ) .