I've had the pleasure of being low level buzzed by both these great birds today. The B-17 is amazing and I've heard them fly before. It makes a very cool deep sound as it lumbers around. The B-25 however, now that one I've never heard fly and that bird is loud and super aggressive sounding. I absolutely love watching these BMF birds grace the skies. I just wish I had the scratch to take one of the flights in each one. That would be beyond cool.
BK