Author Topic: The sticky volume thread  (Read 28747 times)

Dwight (DW)

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Re: The sticky volume thread
« Reply #15 on: June 01, 2013, 04:00:51 PM »
Oh yeah,  if you know, throw in whether your volume numbers are for the shaped blank (common for software shaping dimensions) or finished board (laminates can add upwards of 10% to shaped blank volume).

Why do you want to know?

99% of consumers don't know the answer

Mine are shaped blank.
« Last Edit: June 01, 2013, 04:16:52 PM by DW »

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Re: The sticky volume thread
« Reply #16 on: June 01, 2013, 04:18:15 PM »
Oh yeah,  if you know, throw in whether your volume numbers are for the shaped blank (common for software shaping dimensions) or finished board (laminates can add upwards of 10% to shaped blank volume).

Why do you want to know?


Hi DW,

Finished board (not shaped blank) determines the actual volume.  If the board grows 1/4 inch in total thickness (very common) over the shaped blank dimension then the volume will be significantly different than the software generated figure.  Some shapers who know the results of their laminating process from experience (or who get that info from the service that does that work for them) will figure this into volume.  Others just provide the raw blank #'s.  This is a point of interest and where it is known it would be cool to get that info as well.  

Finished board volume (in liters of freshwater displaced) x 1.025 (~2.5 % to account for salinity) x 2.2 (if you need to convert to lbs) will give you a pretty good idea of how much weight it will take to submerge a board so that the board is entirely submerged with your feet at water level. 
« Last Edit: June 01, 2013, 05:03:19 PM by Admin »

sup_surf_giant

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Re: The sticky volume thread
« Reply #17 on: June 01, 2013, 04:49:26 PM »
Five hour sessions on the bigger boards are routine...
SL

You must have incredible sunscreen.
Taller than most, shorter than others.

Dwight (DW)

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Re: The sticky volume thread
« Reply #18 on: June 01, 2013, 05:53:14 PM »
Oh yeah,  if you know, throw in whether your volume numbers are for the shaped blank (common for software shaping dimensions) or finished board (laminates can add upwards of 10% to shaped blank volume).

Why do you want to know?



Hi DW,

Finished board (not shaped blank) determines the actual volume.  If the board grows 1/4 inch in total thickness (very common) over the shaped blank dimension then the volume will be significantly different than the software generated figure.  Some shapers who know the results of their laminating process from experience (or who get that info from the service that does that work for them) will figure this into volume.  Others just provide the raw blank #'s.  This is a point of interest and where it is known it would be cool to get that info as well.  

Finished board volume (in liters of freshwater displaced) x 1.025 (~2.5 % to account for salinity) x 2.2 (if you need to convert to lbs) will give you a pretty good idea of how much weight it will take to submerge a board so that the board is entirely submerged with your feet at water level. 

Haha.  I'm just curious what you're up to now 😛


Dave B

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Re: The sticky volume thread
« Reply #19 on: June 01, 2013, 07:38:29 PM »
here goes 88+9=.o5+20= 117
my boards
infinity phoenix- 135
angulo 9'0 140
new board coming next week Jp Surf 8 10 127lt

Im curious how much extra volume affects you balance you think it makes it better but does it?

Admin

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Re: The sticky volume thread
« Reply #20 on: June 02, 2013, 07:40:44 AM »
Im curious how much extra volume affects you balance you think it makes it better but does it?

That is a great question and I am sure you will get a variety of opinions.

You have been riding at ~ 40 over.  That will almost always mean that when you apply rail to rail pressure when in paddling stance that you rails are not submerging.  That can feel very stable in a way and is likely the most comforting and stable for new riders (and sometimes in majorly choppy conditions).  When you get down to an overall thickness and rail thickness where your rails are fully submerging as rail to rail pressure is applied (this will happen as you approach what I had called minimum comfortable volume above), you will find another kind of stability.  Your hips can then adjust for chop, etc. After riding a board like this for a while, if you try a full float board it might feel less stable even though it is larger.
« Last Edit: June 02, 2013, 08:03:25 AM by Admin »

Old School

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Re: The sticky volume thread
« Reply #21 on: June 03, 2013, 08:24:25 AM »
You guys amaze me.  My time on the water is very limited, but I'm at 111 + 11 + 0.5 + 20 = 143L.  That 48L below what I ride (using the term loosely).  I'd be terrified on a 143L board. 

PonoBill

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Re: The sticky volume thread
« Reply #22 on: June 03, 2013, 08:49:10 AM »
138 for me, 8'8 x 32 x 4 1/2 x 150L SIMSUP3 -- could have gone a little smaller and still been comfortable. Deck is awash, but the board is stable.
Foote 10'4X34", SIC 17.5 V1 hollow and an EPS one in Hood River. Foote 9'0" x 31", L41 8'8", 18' Speedboard, etc. etc.

Cardiff Sweeper

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Re: The sticky volume thread
« Reply #23 on: June 03, 2013, 09:10:27 AM »
Me 81.5
Board 6.5
Paddle .45
Liters +20

108.4 L

Actual board volume: 92L

16.4 L deficit

Mathematically, does this mean my board doesn't float me?

Admin

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Re: The sticky volume thread
« Reply #24 on: June 03, 2013, 09:24:40 AM »
Me 81.5
Board 6.5
Paddle .45
Liters +20

108.4 L

Actual board volume: 92L

16.4 L deficit

Mathematically, does this mean my board doesn't float me?

Hey Cardiff

You + board + gear = 88.45.  That would mean you are riding 3.5 over.  

In terms of floating you, your board at 92L x 1.025 (to factor in the extra float that you get from salt water) would take 94.3 Kilos to sink to where your feet would be at water level with no board showing*.   For you that leaves a margin of 5.85 liters or 12.87 lbs.  You can still eat a few cheeseburgers.  

*if your board were evenly weighted and perfectly flat and at rest (no forward motion).  As boards are not flat you would actually have your feet deeper than water level (think up to your ankles) and the nose and possibly tail showing a bit (depending on board profile).  A board that is actually at or under the volume of the load that is on it will be essentially fully submerged.  If you have a board that is under the load that is on it and it is not fully submerged (with the caveats above) then one of the other measures would be incorrect (board volume, rider weight, etc).
« Last Edit: June 03, 2013, 09:40:51 AM by Admin »

TallDude

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Re: The sticky volume thread
« Reply #25 on: June 03, 2013, 09:45:07 AM »
106 + 11.7 + .53 = 118 + 20L= 138L
Smallest I can currently handle in marginal chop is 125L
13L deficit

It's not overhead to me!
8'8" L-41 ST and a whole pile of boards I rarely use.

supthecreek

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Re: The sticky volume thread
« Reply #26 on: June 03, 2013, 09:53:34 AM »
98 + 4.5 + .5 + 10 + 20 = 133
                      My board is 145 ltrs
                                       +12 ltrs at the moment

Plenty of float... paddles well... very stable in the lineup
I could go lower without issue with the right shape

endlessfight

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Re: The sticky volume thread
« Reply #27 on: June 03, 2013, 09:55:17 AM »
nice, calculation came in right around 115L and the board i just got is 115L and about as low as i want to go right now. however i am riding fresh water, which is less floaty then salt water, so that has to be taken into consideration imo

Bean

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Re: The sticky volume thread
« Reply #28 on: June 03, 2013, 10:17:52 AM »
(Rider + board + paddle + 20 L = minimum volume - Metric)

Me: 99+7+.5+20=126.5L riding a Phoenix V2, 7'10" x 30.5x4 at 110L


PabstSUP

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Re: The sticky volume thread
« Reply #29 on: June 03, 2013, 11:09:09 AM »
86 + 10 + .7 + 20L = 117 L

Just got an 8'10" Allwave at 146L which is very stable for me.  Also have an 110L Imagine Enigma which is difficult to stay up on unless it's completely glassy and takes a lot of effort away from surfing. 
Hobie Raw 8'11
Sunova Flow 8'4"
Sunova Speeed 8'10
SIC Bullet 14' ASS

 


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