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Can someone explain to me why some discs are rated differently in different plastics and others not?  Like the X XL is 1.0, ESP is 1.2,  and Z XL is 1.5? Do they really fly different in each plastic?

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A little late to the party, but this should help:


The best flight chart, in my honest opinion, is the marshall street chart.


From purely an X vs. Y / distance vs. net stability perspective, it's the only thing like it out there (at least for now) and we like it a lot too from that standpoint.  That said, check out the third quote down:



In reply to Southpaw about the science of overstable and understable. Here's the science behind it in very basic and extremely condensed terms. Now if we can just get some mad scientist to create the ultimate flying disc LOL. 

I was hoping for some lengthy mathmatical equation ;p

LOL. The phenomenon of banking left or right has always baffled me. I guess all discs will bank left when thrown RHBH and will bank right when thrown overhand regardless of the stability rating. This is due to rotation. If I throw an understable disc at full "snap" it will turnover, go right, and hit the ground, but if I throw that same disc at moderate speed with reduced "snap" it will bank left. I understand the theory of center of lift Vs. the center of gravity and how it affects the "degree" of stability 1.0. 1.5, 2.0 etc, but I remain completely baffled on why increased spin causes a disc to bank right. I need to do some more studying LOL.

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