Ellipse-Based Tail Templates

I have been working on ellipse-based surfboard design techniques for several years.  This year I came up with an ellipse-based method for re-designing the earlier/first versions of this tail shape.

For information about the origins of this tail template concept, click these links:
http://bgboard.blogspot.com/2013/08/angular-dolphin-tail-or-wingtail.html
http://bgboard.blogspot.com/2015/03/dolphinwing-tail-evolution-aka.html




Links to the other elliptic surfboard design posts:

Ellipse-based rails
http://ellipticsurfboard.blogspot.com/2015/11/ellipse-based-rail-profile.html
Ellipse-based rocker
http://ellipticsurfboard.blogspot.com/2015/11/ellipse-based-surfboard-rocker_13.html
Ellipse-based fin
http://ellipticsurfboard.blogspot.com/2016/03/ellipse-based-surfboard-fin.html
Ellipse-based planshape
http://ellipticsurfboard.blogspot.com/2015/11/ellipse-based-surfboard-planshape.html