Surfboard flex

The very best way to have a board flex is throughout the board not just in the tail. The way we build wooden boards since 1995 is to make them flex throughout, this is achieved via a suitable length to thickness ratio and a parallel profile which prevents excessive ( stiff ) thickness through the middle of the board. tJust having the tips flex is not as good, it won't give the board drive and projection like a board which bends like a bow, and it will generally make an inefficient accelerating rocker under load.The Blake/Jensen/Fishbone method isn't ideal for flexible boards as it isn't designed to handle the stresses involved and is better as a thicker stiff structure.Generally our more flexible boards deflect about 2 to 4 inches on a land test using the rider's body weight.Here's a flex test on a longboard: http://www.olosurfer.com/flexy.wmv.