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Board volume for weight

Created by Marvin Marvin  > 9 months ago, 20 Dec 2012
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Marvin
Marvin

WA

725 posts

20 Dec 2012 7:33am
I have just been through the process of buying a new board.

Along the cyberway I came across this useful reckoner as to what a board's volume means for stability given your weight (from http://supconnect.mylocallineup.com/SUP-How-tos-Techniques/how-to-understand-volume-on-standup-paddle-boards.html). Here is the snip:



I also read somewhere else that you can adjust the factor for your height - add a kg to your weight for every inch that you are over 5'9". I weigh 88 kgs and am 6'5" high, so my adjusted weight is 95 kgs. I have just bought a 146 litre board, giving a guild factor of 1.5.

I find this a challenge, without being hard work. About right for me, as Goldilocks said.
surfanimal
surfanimal

NSW

1662 posts

20 Dec 2012 10:56am
Nice post. Thanks.
CMC
CMC

CMC

QLD

3954 posts

20 Dec 2012 10:01am
While these kinds of general calculators make sense it should also be assumed that intelligent board design has been used.

Take for example 2 boards of 10'0 x 30 x 4 1/4 and let's say 145 litres. These boards on paper should be the same but in reality one of them could be much more stable than the other. Oulines, wide point position, rail shape, bottom contour and rocker also play a major part in stability.

Volume is just another measure used in board design and only relative when combined as a function of other more vital dimensions.
WINDY MILLER
WINDY MILLER

WA

3183 posts

20 Dec 2012 8:06am
take no notice of this at all !!!!!


speak to robdog and he will put u straight onto your ideal board!



to get the ideal literage,,it's something to do with how many cans of VB you can drink in a weekend ??
husq2100
husq2100

QLD

2031 posts

20 Dec 2012 10:34am
Select to expand quote
CMC said...
While these kinds of general calculators make sense it should also be assumed that intelligent board design has been used.

Take for example 2 boards of 10'0 x 30 x 4 1/4 and let's say 145 litres. These boards on paper should be the same but in reality one of them could be much more stable than the other. Oulines, wide point position, rail shape, bottom contour and rocker also play a major part in stability.

Volume is just another measure used in board design and only relative when combined as a function of other more vital dimensions.


Your on to it Chris....back when I first demo'd some boards and were down to my final 2, both same length and width etc, they felt hugely different....ergo volume is just BS, more crap for the web jockies to toss over.

Jradedmondo
Jradedmondo

NSW

637 posts

20 Dec 2012 11:37am
this is a good rough guide, but you just gotta demo boards and find what you like and what suit you

Jarryd
Marvin
Marvin

WA

725 posts

20 Dec 2012 8:54am
I forgot to mention, there is also an adjustment for the moron factor.

Take 2 litres off for every mm your little finger exceeds 28 mm in circumference.
husq2100
husq2100

QLD

2031 posts

20 Dec 2012 11:40am
Select to expand quote
Marvin said...
I forgot to mention, there is also an adjustment for the moron factor.

Take 2 litres off for every mm your little finger exceeds 28 mm in circumference.


Tip or base?....most girl just like the tip, some want the base but never admit it.

So tell me, how many litres should a 9 foot board be so I can get vertical, hack some buckets and cut back like a 50s hair cut???

hilly
hilly

WA

7979 posts

20 Dec 2012 9:49am
Select to expand quote
husq2100 said...
Marvin said...
I forgot to mention, there is also an adjustment for the moron factor.

Take 2 litres off for every mm your little finger exceeds 28 mm in circumference.


Tip or base?....most girl just like the tip, some want the base but never admit it.

So tell me, how many litres should a 9 foot board be so I can get vertical, hack some buckets and cut back like a 50s hair cut???




87.674432
Marvin
Marvin

WA

725 posts

21 Dec 2012 2:35pm
Select to expand quote
husq2100 said...

So tell me, how many litres should a 9 foot board be so I can get vertical, hack some buckets and cut back like a 50s hair cut???




Sounds like '1.3' type behaviour, so assuming you weigh 100kgs (er, makes it easy) and are around average height, then somewhere between 125 and 135 litres approx?

That assumes a fairly modern volume distribution, and not some specialised shape like a hull paddler.

And no doubts, as someone so kindly pointed out, probably best to demo, but that is a luxury not everyone has, all the time.

And really, it is more a tip for the less knowledgeable, not something for up there types to jump all over.
HGFish
HGFish

NSW

148 posts

21 Dec 2012 6:09pm
Thanks Marvin, it's a useful guide for buoyancy, which counts depending on skill level as I have found out.

While 2 boards with similar dimensions and the same volume may feel different - pure physics would say that they would both float you equally as well. Not to be confused with stability here it's all shape and volume distribution.

kitesurfbali
kitesurfbali

WA

531 posts

23 Dec 2012 5:15pm
This table is ok but can be perfected and should be applied for wave surfing, as for racing doesn't work...
First we have to add Total Beginner (1st timer) need at least 2,3 times the weight.
Then you need to add an Advance category with Guild at 1,5.
Change the Expert in PRO as no way at 70 kilos I can use a 91 liters board!!!!

So:
First timer: weight x 2,3 = ideal volume
Beginners: weight x 2 = ideal volume
Intermediate: weight x 1,7 = ideal volume
Advance: weight x 1,5 = ideal volume
Pro riders: weight x 1,3 = ideal volume

And I also would start to add the 1 kg every 2 cm only for people very told 185 +..
My observation come from 5 years of teaching and renting boards!
Bye Jankie
laceys lane
laceys lane

QLD

19804 posts

23 Dec 2012 7:32pm
Select to expand quote
kitesurfbali said...
This table is ok but can be perfected and should be applied for wave surfing, as for racing doesn't work...
First we have to add Total Beginner (1st timer) need at least 2,3 times the weight.
Then you need to add an Advance category with Guild at 1,5.
Change the Expert in PRO as no way at 70 kilos I can use a 91 liters board!!!!

So:
First timer: weight x 2,3 = ideal volume
Beginners: weight x 2 = ideal volume
Intermediate: weight x 1,7 = ideal volume
Advance: weight x 1,5 = ideal volume
Pro riders: weight x 1,3 = ideal volume

And I also would start to add the 1 kg every 2 cm only for people very told 185 +..
My observation come from 5 years of teaching and renting boards!
Bye Jankie



agree with the advanced and pro rating. by that stage you should know what you want.

i've done under the 1.3 and heaps of guys have. but in rough conditions the fun factor disappears very quickly.

i like riding the small ones, hate paddling them in the rough. mind you coming off race boards and not surfing regularly doesn't help

and i've seen australias best on 10' ers if the waves aren't ideal

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