Hull riders and shapers take note

griffinsurfboard

Duke status
Oct 31, 2004
25,653
6,905
113
Palm Coast , Florida
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Convex Tri
My Andreini does not have any concave.

The bottom is convex to vee.
Convex bottom consisting of a slight Tri Plane with very slight concave in the center blending to Vee then double concave thru the fin .

This bottom was adapted by another- very famous - for his Downrails around 1973 and most top shapers used a variation of this for up to 17 years .
 

Duffy LaCoronilla

Duke status
Apr 27, 2016
38,637
27,968
113
Convex Tri

Convex bottom consisting of a slight Tri Plane with very slight concave in the center blending to Vee then double concave thru the fin .

This bottom was adapted by another- very famous - for his Downrails around 1973 and most top shapers used a variation of this for up to 17 years .
I’ll take a closer look at it with a straight edge.