core material...was Clam sandwich review (ANTI-COMish)
- View SourceI've used EPS(expanded poly styrene), XPS(extruded polystyrene), and
PVC(divinicell, herex, etc.). Most wakeboards are made from 2-part
Polyurathane. I haven't used that.
PVC is the best and most costly.
PRO's- doesn't absorb water
high sheer strength
conforms to curves easily
CON's 5lb density is relatively heavy
Tony Fin of liquid force told me the polyurathane core in his average
wakeboard costs $6....compared to about $75 for a PVC core.
Polyurathane absorbs water(not as fast as EPS), and loses sheer strength
after repeated flexing...therefora a 2-year old board is more likely to
Now, I'm no engineer, so please don't hand me any trigonometry,
Dave&Dave, but I have done a lot of board building and testing and
research, and these have been my findings.
Initial testing of factory prototypes is INCREDIBLE...rode over granite
rocks w/ no damage!
- View Source--- In firstname.lastname@example.org, David Turner <windwave@p...> wrote:
> Tony Fin of liquid force told me the polyurathane core in hisaverage
> wakeboard costs $6....compared to about $75 for a PVC core.Ok. No trig. But a sheet (8'x4') of 3/4" divinycell H80 is something
> Now, I'm no engineer, so please don't hand me any trigonometry,
like $120 at fiberglass supply. How many cores can you get out of
I bet it's more than 1.6 8-)
I think the most widely available polyurethane foam (other than clark
foam) here in the states is last-a-foam. It's a bit cheaper ($52 for
8'x2' sheet) but nowhere near as good as divinycell for material
properties. Is that what the wakeboard makers use?