Originally Posted by Dave242
But, assuming the that flight plates are the same weight, wouldn't a narrow rim disc have more angular momentum since the rim weight is concentrated closer to the edge of the disc (a smaller cross-section triangle)?
I suspect the wider rims provide more stability due to the aerodynamics of a wider wing.
Haven't read the whole thread, but I wanted to jump in and correct this. The flight plates aren't the same weight. Flight plates on wide-rimmed discs tend to be thinner to compensate for the extra mass at the edge. The plastic density is what's generally common across molds.
The aerodynamics of a wider wing (mostly the decreased drag) don't have a huge effect. Some wide wings generate more lift -> more turn but others are designed not to generate as much lift and are thus more HSS. It seems like most of the newer ones released are leaning more toward the more lift / less stable variety though.