Stated versus actual Volume discrepancy

I know this isn't the first time this subject has raised it's head but the list below is from the current ISAF website http://www.sailing.org/11672.php

Why does starboard, for instance, constantly year after year quote a board's volume as say 122litres when in fact it is only 113litres - only 3 litres more than the next size down. I know the argument that volume does not translate to performance is generally used as their defence, but I would have thought there would be laws regarding false or misleading advertising.


Board / year date registered weight length width volume

ISONIC 76 2009 19/08/08 5.55 2442 547 84
ISONIC 86 2009 19/08/08 5.65 2414 562 86
ISONIC 94 2009 19/08/08 5.9 2422 585 92
ISONIC 101 2009 19/08/08 5.9 2362 636 97
ISONIC 111 2009 19/08/08 6.3 2328 683 110
ISONIC 122 2009 19/08/08 6.7 2320 750 113
ISONIC 133 2009 19/08/08 7.4 2234 850 127
ISONIC 144 2009 19/08/08 7.9 2270 850 137
ISONIC SPEED SPECIAL W44 2009 19/08/08 4.2 2290 440 53
ISONIC SPEED SPECIAL W49 2009 19/08/08 4.6 2310 490 64
ISONIC SPEED SPECIAL W53 2009 19/08/08 5 2302 530 74

PS - In case it's not apparent, I am not sponsored by Starboard but should I be I would happily defend their right to list any volume not even close to the actual

PPS- I own two *board boards and are very happy with both of them.

When looking at board sizes and comparing brands I would tend to look more at widths than volume, more width, especially in the tail will generally provide better early planning ability. Comparing the specs of the Isonic 111 and 122, the 122 is much wider and hence will plane earlier and 'feel' more like a board with 122L...

ISAF site has had typos in the past, maybe the 76 is actually 76?

They can name them whatever they like... but they should put the actual volume on their somewhere.

Anyway, I actually like the fact that the 122 is 113L, I was considering getting one, but thinking it was a bit too big at 122L.

I think that quoting marketing volume vs. real volume is BS and I find it annoying. I bought an IS111. At the time I was debating between a 111 or 122, had I known the real volume of the 122 I probably would have gone for the 122.

Its hard too know Sausage unless you have them side by side to see where the differences are. I know the IS86 has a scooped out deck around the mast track not sure about the IS76.

Haggar,
This may shed some light on the subject. Have hi-lighted a pertinent point. The more you dig the smellier that rat becomes.


ISAF APPROVED SERIES FREEWAVE/SPEED/SLALOM
PRODUCTION BOARD REGISTRATION SYSTEM
1
An ISAF Approved Series Production board or board range* is a mass produced
board or board range, made in a production run of not less than 50 Slalom/Speed
or 50 Freewave units per board in the range. Each board in the range must be
produced from identical female moulds using the same construction specification.
*A range of boards may consist of an unlimited number of size boards with
identical design purpose but varying dimensions making them suitable for
different wind/wave conditions or crew weight.
These moulds (sets) shall have been inspected (Part II registration), together
with a board from the production run, prior to the board being added to the
approved list for International, Continental or World Championships. Boards, for
which ISAF Part I registration has been applied but have not yet passed the
inspection, are eligible for National Racing only.
This shall be done by way of individual board serial numbers and copies of
shipping documents from the manufacturer being sent to the ISAF Secretariat.
Only a board 'Part II' registered by ISAF may race in Funboard Class
Windsurfing Class International events.
1. Class Rules
When a manufacturer has decided that a new design shall be made
available for competitors to compete in Funboard (Production Board)
events, he shall first check that the manufacturing procedure agrees with
the latest version of the Class Rules of the Funboard Class. In particular,
rule B.1.1 that concerns the ISAF logo, which must be displayed on each
board
For the latest version of the Class Rules please click here:
http://www.sailing.org/5671.php
ISAF APPROVED SERIES FREEWAVE/SPEED/SLALOM
PRODUCTION BOARD REGISTRATION SYSTEM
2
2. Registration Part I
Immediately when a board manufacturer starts production, excluding
prototypes, forms Part 1a & 1b must be completed. These require that a
number of measurements and the average weight and stiffness of the hull
be established. The form should be signed by a senior management
executive of the manufacturer. Please follow the link:
www.sailing.org/2114.php
The form should then be emailed or sent to the ISAF to: norbert@isaf.co.uk.
The full address is at the head of the form
On receipt of these forms, an invoice will be raised by ISAF and payment is
due for settlement within 30 days.
The fees are established as follows:
?300 British Pounds for any number of boards up to 6 of the same range
for Slalom/Speed Boards.
?300 British Pounds for any number of boards up to 6 of the same range
for Freewave Boards.
?50 British Pounds for any extra board of the same range
On settlement of this invoice the boards will be listed for National Racing.
Not less than 60 days after first receipt of form Part I the mould sets and
production boards should be available for inspection. The builder will be
required to liaise with ISAF for the inspection to be scheduled. Reasonable
pre-agreed travel costs will be paid by the builder to representative of ISAF.
3. Registration, Part II
When at least ten (10) boards have been manufactured and are ready for
inspection with the production tooling, form Part II should be completed,
noting any changes in specification from those originally stated on form Part
I. This form should then be sent to ISAF and the inspection date fixed.
Please follow the link: www.sailing.org/2114.php
ISAF APPROVED SERIES FREEWAVE/SPEED/SLALOM
PRODUCTION BOARD REGISTRATION SYSTEM
3
Registration
ISAF will enter the board on the list of ISAF Approved Series Production
Boards only when the procedure and inspection has been completed and all
invoices paid and costs settled. To see the current board list click in the link:
www.sailing.org/11671.php
4. Design or Production Changes
If any changes are made to a registered board, the ISAF must be notified
immediately. The changes may make the board liable for re-registration or
a new registration.
ISAF (International Sailing Federation):
ISAF is based in the Isle of Man, an offshore island of the UK. All payments
must be made to ISAF Ltd., Isle of Man. The administrative arm of the ISAF is
ISAF (UK) Ltd.
Contact
ISAF (UK) Ltd., Norbert Marin, Technical Coordinator, Ariadne House, Town
Quay Southampton, Hampshire, SO14 2AQ, United Kingdom.
Tel: +44 23 80635111; Fax: +44 23 80635789; Email: norbert@isaf.co.uk
________________________

i understand that the isaf have been trying to measure the latest starboard slalom kit.

problem has been that no one can catch up to them to have a decent look..

People are confusing two different types of bouyancy in some of the above posts.

Static bouyancy is volume alone. Width does not matter, nor does length. If the board is not moving the volume of foam in it determines what it will float.

Kinetic bouyancy at slow speeds is influenced by width. (1) the board will feel more bouyant at sub planing speeds due to the width (2) it will feel more laterally stable giving the illusion of more bouyancy. That si where the virtual bouyancy crap came from a few years ago.

Thus, both are important.

I think it is disgraceful that manufacturers do not provide proper volumes. There is a number of different ways they can measure it easily. It would be nice to see magazines measure the volumes in all their board tests.... if you are doing heaps of tests, and making squillions of $$$ out of selling mags to us, it would be easy to build a rig which pushes down onto the mast track to sink a board in a giant rectangular bathtub, measure the displaced water, done.


I think correct volumes are important. For eg: I want soeemthing with a bit more static bouyancy than my EVO80 and little more early planing but similar wave riding capabilities. If I pick a RRD Wave Cult 85 I know it is an earlier planer (flatter rockered). However if it is really 80L I have only gained one thing out of two that I was looking for and how would I know until I have bought it?
Manufacturers need to realise we are not all d1ckheads who fall for brochure rubbish about how the smoothness of the turn will make me feel deep within my soul and how it turns on a dime but is faster than last year's model.
Give us a figure but make it accurate.

Wouldn't a "water displacement" measurement tell you the mass of the board rather than the volume? (i.e. the board displaces an amount of water of the same mass as the board).

I guess if you know the density of the EPS core and ignore the other layers as immaterial then you could convert to volume.

Measuring the volume of an irregular-shaped solid object isn't as easy as it at first appears...

Crash,

Even if the volume is correct a 99L wave board wouldn't float you at 94kgs as you have to take into account your weight plus the weight of the board plus the weight of the rig