how to calculate board flotation

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Obelix
Obelix
WA
1173 posts
WA, 1173 posts
11 Jan 2005 12:43pm
Can anyone tell me how to calculate the ideal board volume?

I'm 193cm tall, and weigh 100Kg (beginner/intermediate).

What volume should I look for to?

Regards,


__________________
Obelix
curac
curac
WA
1160 posts
WA, 1160 posts
11 Jan 2005 4:19pm
well it depends on what type of sailing you do really, and in what kind of wind.

1L will float 1KG so 100L board will float you.
but say if you like wave sailing you may want a smaller board
i weigh 84KG and use an 82L wave board.. but having said that i would prefer and 74L most of the time.. (i just doing have one)

errrr i hope that helps you some how

I LIKE WATER
yoyo
yoyo
WA
1646 posts
WA, 1646 posts
11 Jan 2005 4:59pm
"1L will float 1KG so 100L board will float you"

Not true!! Board will weigh at least 7kgs , rig 13kgs so even a 120ltr board will have water lapping your feet if you are not moving. Curac, comparing what a wave sailor wants is irrelevant...the guy said he was a beginner.

100kgs is not light. see if you can test (or hire) a 131 Carve from Ian (Peli) or Jez (lucky bay)and see how you go. That would be my starting point.
Obelix
Obelix
WA
1173 posts
WA, 1173 posts
11 Jan 2005 5:24pm
Thanks for the advice guys.

I need to just float for now, and my current slalom board is sinking. Once I get to some reasonable level, the flotation will be less important (I hope), so the wave advice will be useful too.

The idea of renting the 131 Carve is excellent.
I'll definitelly try that next week (as soon as my nose stops peeling off ).

Regards,


Obelix
yoyo
yoyo
WA
1646 posts
WA, 1646 posts
11 Jan 2005 5:32pm
I think Ian has a range of Carves for hire so if one is too small or large you can move up (or down ) to the next size..
pole boy
pole boy
WA
292 posts
WA, 292 posts
13 Jan 2005 2:48pm
1L = 1KG will give you nutreal bouyancy in fresh water. so you want to have more volume then overall weight. though salt water will aid you a bit it still isn't enough.

poley

why walk when u can sail?
Grumpy
Grumpy
WA
60 posts
WA, 60 posts
13 Jan 2005 8:21pm
Obelix

I come in at 107kg, and have consistently found 115 litre boards always allow me to grovel home. 105lt's, regardless of width, always sink if the wind dies. As per above, the board and rig weight something, so you need some spare volume.

If you can waterstart (ie you don't need to uphaul), I would suggest 110-120litres as a good all rounder. Another suggestion would be to go and see Simon at Go Windsurfing in Safety Bay and hire a board for an hour. I'm sure he will allow you to shift up and down a size within the time limit to see where you feel comfortable. You might even try and like some of his "for sale" kit, and there is no substitute for trying before you buy to ensure it suits you.
curac
curac
WA
1160 posts
WA, 1160 posts
14 Jan 2005 10:13am
yoyo he said beginer/intermediate,

you don't have to be advanced or what ever to wave sail,, i go wavesailing and i consider myself intermediate at best, so you see it's not irrelevant.

I had a large board 100L. and found that they make you think you are better than you are.

I LIKE WATER
decrepit
decrepit
WA
12885 posts
WA, 12885 posts
14 Jan 2005 7:24pm
Curac's right, we've got a young guy here in his second year, broke 2 boards in his first year jumping, (old boards left in the sun gone brittle), start of this season he bought himself a floaty wave board. He's still only managed a handfull of gybes, but he's out there in head high waves, charging down the line and even attempting off the lips.
I'm sure he would only regard himself as a beginer/going on intermediate.

decrepit
Obelix
Obelix
WA
1173 posts
WA, 1173 posts
15 Jan 2005 1:24pm
Thanks guys,

I'm actually a beginner who is desperatelly trying to be an intermediate, but the label is relative.

I've done the beginners course, then the straps and harness, but don't know how to water start. Still struggling to get into straps, so I step on them .

I believe an outdated gear is holding me back, but this is a lame excuse when you see Robby Naish jumping the beginners board...

I start by stepping on the board in the shallow water, then I plane if wind is sufficient (at least 20kts), and stop deliberatelly when the water is up to my waist.
Then I do a huge step (no water start yet for me) and the board sinks and turns into the wind. I then first swear, then try again, and again, and again...

Grumpy, your advice is good, however, I live NOR and Safety Bay is a long way. Try before buy sounds really tempting though...


Obelix
ccroft
ccroft
WA
2 posts
WA, 2 posts
16 Jan 2005 8:45am
Obelix

My son just recently learned on my free formula with just over 150 l, this type of board may be suitiable for you. I was 92kg and went to 100kg and now sail on a 131 carve, would need a bit more float as a beginner uphauling it though.

There is a 151l carve too, that may do too.
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