I am a hobbyist metalworker and I'm working on some gyroscopes for family for X-mas, and realized that there was something I did not understand completely with regard to gyroscopes, and while there is lots of information online, I'm struggling to find an answer to the following.
I generally get the sense that having absolutely as much mass as possible towards the outside edge of our spinning disk, with minimal mass towards the inside (center of the disk) is ideal, based on every gyroscope toy I've ever seen having some type of central mass reduction in place.
Why wouldn't a solid disk be better than say one with a thin center area(, often seen with cutouts like on the classic gyroscope toys)? Said another way, does having as much mass towards the outside, with extra mass towards the inside/center help or harm the gyroscopic effect?
Assuming you can get both to the same RPM having the extra mass would make for a better gyroscope, wouldn't it?
And if that is the case, then why are soo many gyroscopes thinner towards the center?