Well, my serious response, if you're in a 400 level Aerodynamics class, you should be able to study for 12 hours and still at least pass the exam....I mean, clearly to get to that difficult of a course you're rather intelligent to start with, and while it may not be close to the grade you would ideally get, it's better than failing your exam. I've had the same issue with courses I've taken, hell, one this semester even. Human Pharmacology, I'm an undergraduate but its a mix of grad students and undergrad students. This exam is multiple choice, but it's not one where you can eliminate the obvious choices and narrow it down. You have to know every single statement and every aspect of the material in order to do well. Didn't realize I had one coming up that next week, and I only got like 2 days of studying in for it. Ended up getting an A-. Granted, I didn't learn the material at all like I should have, and I'm basically going to have to re-study everything come time for the final, but at least the cramming saved me there. Granted, I got lucky as crap with that grade, we were curved to a 45% average, sooo yeah. I should have actually had like a C I believe.
Anyway, TL:DR - Cram the fuck out of the material for the short while you have, and pray to everything holy that there is a steep curve. If you have no curve, just do your best not to fail.