You need to conduct an experiment!

Aim:

Determine board volume.

Apparatus:

beer x 10 cartons
board

Method:

Weigh one bottle of beer.
Head to your nearest windsuring spot.
Put board in knee deep water.
Place beer on board, one at a time until it sinks.

Results:

Multiply weight of single beer by the number of beers it took to make your board sink. Bingo, volume.

Discussion:

Drink beer with all windsurfers who took part in experiement or observed from beach.

PS: I am in Perth, let me know when and where you will be doing experiment

Cheers

Sorry to quibble, but as well as the adjustment for fresh/salt water. You've also got to add the weight of the board to get volume. The weight of beers just gives you it's floatation/buoyancy

Perhaps I shouldn't say "just" it's buoyancy we're really interested in.

If I do this in my pool, how much difference is there between sea and pool (fresh) water?

Dunno, never tried it with beer.

quote:

---

Originally posted by REN658



If I do this in my pool, how much difference is there between sea and pool (fresh) water?

Cheers Simon.

---

From my ancient memory it takes about 10% more weight to sink in seawater

or stop looking so deeply into things and just go bloody sailing instead

no one actually knows the volume of any board on the planet,
of all the years i've seen catalogues and propaganda, never have i seen evidence of a submersion tank or any apparatus which proves volume! most shapers on maui i've met go "hey dude, lets call this shape the 96, its got a good ring to it"
my 93 is your 102!

quote:

---

Originally posted by nebbian



Seawater is about 3% denser than fresh water (just googled it).

---

So much for my memory, perhaps I was retrieving the dead sea figures???

For my own boards I weigh the shaped blank, (known density) then add on the extra sandwich volume.
That's going to be close enough.

I thought IFCA/ISAF have a submersion tank. Theirs is the most reliable source of volume and it sometimes differs a fair bit from the manufacturer. Fanatic's excuse with the 05 Falcons is that volume is a marketing tool then when they actually designed the board it had less than the marketed volume but they kept it and said it's "virtual volume". Unfortunately with the falcon virtual volume didnt really work cause they spread it too thin. I do believe in virtual volume- hypersonics convinced me of that.

Bah bloody board manufacturers- nothing is constant. Take length for example some manufacturers take it as length along rocker others take it as straight length... how about some damn consistency. I'd say up to 5L difference in boards is acceptable, I was surprised that my f2 SX is 5L out but figured that maybe volume figures were calculated on CAD outside dimensions and then with the cutouts and all the rest 5L was eaten up.

If you are concerned about volume or any other measurement of a new board- race, slalom, speed, freewave/freestyle and wave are all covered on IFCA list. Old boards, just compare and take it for a sail with similar sized boards and you will get a pretty good ballpark figure.