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BoardS shown:

6'0" Tri-plane Hull - round tail :: 20.5" x 2-7/8" :: black opaque resin tint, polished gloss :: Glass-on 9" Greenough Stage 4A by True Ames.

7'0"" Tri-plane Hull - round tail :: 21.5" x 3" :: khaki green opaque, wet-sanded gloss :: 9"" volan Greenough 4A by Fibreglas Fin Co.

6'0" Tri-plane Hull - round tail :: 20.5" x 2-7/8" :: khaki resin tint, wet-sanded gloss :: 9" Liddle Flex by Fibreglas Fin Co.

 

 

tri-plane hulls

The Greenough tri-plane hull design is a very fast and efficient bottom contour, featuring a rolled hull entry blending into three planing surfaces. A tri-plane is easier to surf than deeply rolled displacement hull, with flatter planing surfaces to drive off of. The tri-plane panels displace water and provides lift as it flows towards the tail, much like the longitudinal cross-section of a tear-drop---the ideal fluid-dynamic form. As water flows towards the tail, the three panels blend back into one single plane---a low-rockered, thin, and flexible tail.

I combine a modern rail profile with a bit of edge starting at the leading edge of the fin to provide a more accessible hull experience. The S-deck keeps volume under your belly-button for efficient paddling and under your feet for a balanced and sensitive foil. Tapered stringers and glass-on fins amplify integrated flex and twist...

The shorter templates with round tails are really fast and loose in surf that's head high and under, while the pintails are more stable and can be driven harder in overhead surf.

Using a proper flex fin with these designs is crucial, and having a quiver of flex fins adds a lot of variety to the hull experience. The Greenough 4A is a good fin to start with, as they have a stiffer base and more surface area to drive off of. As you develop the muscle memory to inititate extended bottom turns by loading up the flex fin and using the rail as a fin, try using fins with less base area and more concave flex, like the Liddle templates.

~ 100% hand-shaped

~ available 5'10" to 7'0"

<---That's Justin Adams on a 6'8" tri-plane hull...

These boards came from a desire to do what George Greenough was doing on his kneeboard, but standing up.

To learn more about the origins of the shortboard revolution and the history of Greenough's designs, check out FLEXSPOON.COM

Humble thanks to MARC ANDREINI and GEORGE GREENOUGH...