Dual Single Fin ?

General Discussion
1

For my upcoming board project, I need the center bottom line free of any obstacles, which does not work with the preferred single fin setup.
Googling around I found this: http://comparesurfboards.com/reviews/allrounders/neal-purchase-jnr-duo-dual-single-fin-surfboard-review
Sounds rather interesting to me and would work for my intended build.
Anybody into it and got some thoughts, hints, ideas o the subject?

Referring to vortex tunnel fins I already came up with the idea of setting them up quite narrow and foil the inside to get a vertical vortex effect, which may allow to got straight faster…, but maybe its bullshit…

2

Surfdude, Bill Thrailkill and others have done this before. It is called a ‘twingle’ on Swaylocks (search for this word) if the fins are relatively close 1 or 2 inches (25-50mm).

3

Thanks for this, thought I’m going a new pass :frowning:
Just read some threads on “Twingle”, think I will go for one (or better two haha)

4

Twingle’s are friggin fun. Thanks to Bill Thrailkill for getting me into them. I’m toying with the idea of doing a twingle longboard next. Possibly assymetrical as well.

5

@surfdude, read up on the science. Better yet, try to have the experience.