Lewis
* Ace Member *
Why is it that discs become less stable as they're broken (or beaten) in? I figure it must have something to do with drag, but I wonder if anybody can offer a nice explanation of the phenomenon.
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[Question] Question of physics
- Thread starter Lewis
- Start date
jedwards
Eagle Member
There was an earlier thread called "Breaking a disc in" that covered this as well -- hope it helps: http://www.dgcoursereview.com/forums/showthread.php?t=236
High Flyer
Newbie
It's so hard to find a good explanation on this.
Here's my thoughts on the matter. There's 2 things that cause a disc to change bank: gyroscopic procession and asymetric lift.
A sharp edged, well tuned disc will have very little asymetric lift, and what you are left with is the gyroscopic procession (as the disc rotation slows, it will "fade"), this is considered overstable.
A blunt edged, or out of tune disc will have much more asymetric lift (the side moving with the direction of flight will have a higher speed relative to the air, and will create more lift, creating "turn"). Where the asymetric lift is more dominant than the gyroscopic forces, we consider the disc understable.
A couple things I have noticed about worn in discs. The leading edges are either bent down or blunt, and the lifting surface has often become concave or uneven. Thus, they become understable.
Here's an interesting video on "tuning" a disc:
http://s307.photobucket.com/albums/nn287/geoloseth/?action=view¤t=DiscTuning.flv
Here's my thoughts on the matter. There's 2 things that cause a disc to change bank: gyroscopic procession and asymetric lift.
A sharp edged, well tuned disc will have very little asymetric lift, and what you are left with is the gyroscopic procession (as the disc rotation slows, it will "fade"), this is considered overstable.
A blunt edged, or out of tune disc will have much more asymetric lift (the side moving with the direction of flight will have a higher speed relative to the air, and will create more lift, creating "turn"). Where the asymetric lift is more dominant than the gyroscopic forces, we consider the disc understable.
A couple things I have noticed about worn in discs. The leading edges are either bent down or blunt, and the lifting surface has often become concave or uneven. Thus, they become understable.
Here's an interesting video on "tuning" a disc:
http://s307.photobucket.com/albums/nn287/geoloseth/?action=view¤t=DiscTuning.flv
Last edited:
Thanks man...I just did that tuning shit with my DX Wolf. TOTALLY fucked it up!
Never tune DX, my man! Tuning is for premo plastic only.
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