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11-29-2009 | 11:37 AM

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doublesixes

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From: santa ana, CA

RE: What is 3D/4D mean?

Although I fully understand what type of flying 3D represents, I don't know exactly the origin of the word. Is it somewhat related to 3d as in 3 dimensions or is it simply a competition class like F3A, F5B, etc?

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