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Sup to windsup conversion

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Created by olskool 1 month ago, 15 Jun 2019
olskool
QLD, 1407 posts
15 Jun 2019 12:26PM
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Hey crew, can a Sup be easily converted to a windsup? Any rules as to placent of mast track/ insert? Thinking of doing this on a 10'6"?32" 200litre.

DavidJohn
VIC, 16145 posts
15 Jun 2019 10:22PM
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It should work ok.

If you are planing on plaining and going upwind you will need a better fin like the one shown at the beginning of this vid.

The board in the vid is a 10'10" Nalu SUP board and it's also about 200ltrs.

You should check with a local Naish dealer and see if they have a 10'6" Nalu and measure distance the mast base hole is from the tail.

My 11' Nalu has a mast hole that's about 78" (200cm) from the tail.

515
201 posts
16 Jun 2019 4:46AM
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Yes there are some sup that have a mast hole to screw your base in. As above Naish but also Starboard and Fanatic but double check.
Easy enough to insert high density pvc, mast track then glass over.
Sup is great for getting more time on water. My brother fishes off his with handline and lure
Once you get a taste of waves then choose sail or paddle for days conditions.
Enjoy mate

Tardy
3025 posts
16 Jun 2019 1:40PM
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good size for wind-sup 200 litres .
i have a 10.6 Nalu with a factory mast insert ,i can give measurements of placement if you want ,
a mast track would be good though ,.

olskool
QLD, 1407 posts
16 Jun 2019 4:12PM
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Tardy said..
good size for wind-sup 200 litres .
i have a 10.6 Nalu with a factory mast insert ,i can give measurements of placement if you want ,
a mast track would be good though ,.


Dude swing me the measurements from your Nalu. Will instal mastrack in similar position.

Mark _australia
WA, 19257 posts
16 Jun 2019 2:35PM
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Anything better than the dinky little plastic insert on the JP's.

I wonder how many of the Cobra made boards have the same thing, it was shockingly bad. I think for any serious wave use on any SUP its worth the time and router work.....

Tardy
3025 posts
16 Jun 2019 4:16PM
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From the nose ,it's 1.325 mtrs
mines 30 wide ,yours will be a bit more stabile being 32 .good fun in little waves or flat ..
i wear boots so I don't have to put wax over my nice bamboo.
it surfs really good these nalu's .longboard style .

olskool
QLD, 1407 posts
16 Jun 2019 7:22PM
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^Thanks Dude Will measure up n see how it looks.

forceten
730 posts
16 Jun 2019 10:30PM
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I would use the mast location , as noted by a very similar length. I used a full size mast track in case I needed adjustment.
i had to remove the carry handle.

LeeD
533 posts
17 Jun 2019 1:59AM
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I'd not bother to fully reinforce a mast box. The reason for the tiny plug on lots of SUP's is to allow them to rip out on a hard fall in the waves, as you know the power of whitewater on a long wide light board.
Consider 60" from the tail, a typical longbox adding around 9 more inches.
SUP's have thin tails and often spend time in displacement mode.

NordRoi
273 posts
17 Jun 2019 7:23AM
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olskool said..
Hey crew, can a Sup be easily converted to a windsup? Any rules as to placent of mast track/ insert? Thinking of doing this on a 10'6"?32" 200litre.


Depend what you want to do.
a big windsurfing board can also do a good sup for exploring and just chilling..
All depend on what you want to do with the SUP.

I have a Nalu about 200L as a sup and it's super fun, in waves and on flat water.
I have a windsurfing board, the starboard Go Board 170, on flat water I pass my Nalu and I take the Go and go explore.

For windsurfing the Go is quite good and can also initiate friends etc

I have a AHD 8'3" sealion, windsup/Sup 135L. Very very very fun as a SUP in wave and even more as a windsup in waves.

If surf and waves is what you are going to do....I'll go with a compact shape.
if it's only for gliding a 10'6 will do the job, but Mast track. Insert will probably pop-up after a while.
Also, a cheap old windsurfing board wil do as good for exploring and crusing.

Gestalt
QLD, 12082 posts
17 Jun 2019 12:59PM
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10'10" is a pretty big board.

The Nitshke Longboards custom windsup (mast track 9'8" x 33") I have is a lot of fun. It has a mal rocker line so it carves pretty well on a wave and surfs well in more hollow waves as well as fuller runners. switching from a big single fin to a 2+1 give it a lot of versatility.

my son is using a fanatic 9'2" allwave. it's a little big for him but he really likes it in small surf. I use it as a sup as well and wouldn't want to go much smaller for my weight and skill as a sup. for me at 9'2 it's a little slow paddling into small waves where as the 9'8 glides better.

as a windsup smaller works. i'm trying to go down to a mid 8' board as soon as one comes up at a good price. the only issue with using sups as windsurfers is the construction is lighter and they don't take punishment as well. not only the mast connection but the area at the nose where the boom hits.

olskool
QLD, 1407 posts
17 Jun 2019 3:38PM
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So heres what ive got
C4 Waterman 10'6"?32.
Carry handle in centre of board length. So i think mastrack just in front of that? (As pictured) Only thing which concerns me is this board has about 75mm tail rocker extending quite a way forward. Tardys Nalu came in at 1325mm from nose. Looks a bit too far forward on this board. Most of the Bic stuff is central of board length. Wonder if i could drop a threaded plate into carry handle T shaped void, n use a rubber door stop. So when plate pulls up to underside of T the rubber bulges n also prevents movement? Might be ok for test sail. Whats ya thoughts guys?

Tardy
3025 posts
17 Jun 2019 3:31PM
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Just thought I'd give you a complete photo ..so where I paddle it it where the handle is mid section

so it's pretty spot on for this board ,but it is more of a sinker than yours ..at 160 litres .

but looking at yours it does seem too far forward ..I would paddle it to see where you stand ,and go from there ..

olskool
QLD, 1407 posts
17 Jun 2019 6:43PM
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^ thanks Dude. So when i paddle flatwater im standing forward of the handle. Almost as far forward as your mastfoot location. This keeps the nose from lifting too much when paddled strongly.The sweet spot i guess. Fair bit of tail rocker. Ive got a 10" mastrack so i guess itll be ok.

forceten
730 posts
17 Jun 2019 9:25PM
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NordRoi said..

olskool said..
Hey crew, can a Sup be easily converted to a windsup? Any rules as to placent of mast track/ insert? Thinking of doing this on a 10'6"?32" 200litre.



Depend what you want to do.
a big windsurfing board can also do a good sup for exploring and just chilling..
All depend on what you want to do with the SUP.

I have a Nalu about 200L as a sup and it's super fun, in waves and on flat water.
I have a windsurfing board, the starboard Go Board 170, on flat water I pass my Nalu and I take the Go and go explore.

For windsurfing the Go is quite good and can also initiate friends etc

I have a AHD 8'3" sealion, windsup/Sup 135L. Very very very fun as a SUP in wave and even more as a windsup in waves.

If surf and waves is what you are going to do....I'll go with a compact shape.
if it's only for gliding a 10'6 will do the job, but Mast track. Insert will probably pop-up after a while.
Also, a cheap old windsurfing board wil do as good for exploring and crusing.


The Bic in my photos, was replaced with a 135 l Sea Lion. It's very close to a Windsurf board , brilliant board.

Use the mast track position , I'll say again on a similar length factory board.
If you want time on the water when the wind is lighter or practice sail flips etc. install the track.

olskool
QLD, 1407 posts
18 Jun 2019 12:50AM
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^ Forceten, all the boards ive looked at are 10'6". Including Tardys. But they vary about 300mm in position. Guess it comes down to rockerline n plan shape.

forceten
730 posts
17 Jun 2019 11:38PM
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olskool said..
^ Forceten, all the boards ive looked at are 10'6". Including Tardys. But they vary about 300mm in position. Guess it comes down to rockerline n plan shape.


You are saying that the center of the mast track or little bolt thing varies by 30cm /300mm on boards that are the same length ?

using my Sea Lions track and Tardys, for the CENTER OF THE BOX, the average location is .58 of the length , FROM the tail.
your length being 10.6 feet , 270 cm . 270 x .58 is 159cm to the center. Tardys from the TAIL is 138cm. Mine 156cm.You might average those again giving you 147cm from tail. Using a 25cm box , the mast length could be adjusted from 100cm to 172cm minus a little for the bolt, depending on which brand , single or double.
mast tracks come in 20 or 25cm lengths.

verify the first sentence please



olskool
QLD, 1407 posts
18 Jun 2019 7:41AM
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Forceten, ive got one of these new fandangled things called a tape measure.
10'6" DOESNT = 270cm.
I ran the tape over my board n actually got 318cm = 10'4". Board has 10'6" scribed on the underside.
As stated earlier the Bic windsups are smack in the middle of the board length. Hence the offset handle id guess.
Tardy measured his at 132.5cm from nose on a 10'6" Nalu.(323cm)
159cm is centre of my board. Handle is from nose 165 thru to 175cm. Tail biased. As id like to leave the handle, im suggesting i place the 25cm chinook finbox starting at 136 thru to 163cm from the nose.
So in the rear position of track mastfoot would be in central position of board. Sliding forward itd fall 4cm short of Tardys 132cm measurement.
Please CLARIFY what measuring system you use.
CLEARLY it isnt Metric nor is it Imperial.
Whatchu drinkin Man?

forceten
730 posts
18 Jun 2019 9:03AM
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You are correct, I mess up my inches to cm. It's a pita to use meters inches cm mm in one computation. As well nose , when I always use tail.,

question exists still how do all the boards you measured vary by 30cm?

i assume that Tardys has a screw no track ?

on your board 320cm, half way point , I don't care about. If you installed the 25cm box at Tardys measure 132cm from the nose, you would have a adjustment from 119cm --144cm, that covers his screw center each way by 12.5 cm.

your handle is 165-175cm from nose. It's not in the way.
Tardys from nose is . 40 of length. If you use that .40 on your slightly shorter length the mast center would be 128cm from nose.

I used the mistake measuring system of converting feet to cm, rather than inches to cm, 1 inch X 2.54 = 2.54 cm.

DavidJohn
VIC, 16145 posts
19 Jun 2019 5:19PM
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I'd be measuring it from the tail.. Not the nose.

olskool
QLD, 1407 posts
19 Jun 2019 6:27PM
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^^ Why is that? What changes? Apart from the numbers. Is that the standard/ norm to measure or ?
The box goes just forward of centre?

olskool
QLD, 1407 posts
19 Jun 2019 6:42PM
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Forceten. Tardys board with non adjustable position is 132cm from nose. Well forward of centre.
Bic Windsups are centrally located on board length. Roughly 162cm to centre of track on a 324cm (10'6").
162-132=30.

ducati
QLD, 421 posts
19 Jun 2019 7:11PM
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DavidJohn said..
I'd be measuring it from the tail.. Not the nose.


I've got a 11'6 (350cm) Bic windsup and a 10'9 (328cm) Jp windsup and both are the same,
1950cm from the tail to the centre of the mast track

olskool
QLD, 1407 posts
19 Jun 2019 7:36PM
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Cheers Ducati will run the tape n check it out.
1950 from tail to centre of box. Wow !! That doesnt look right on this board. Very far forward. Only 1220mm from nose to centre of box.
Got any pix of yours?

Mark _australia
WA, 19257 posts
19 Jun 2019 6:25PM
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Agree with DJ, if comparing boards its always from the tail.
The back half is the business end of rocker, where its working when you are riding a wave.
You will find very little variation in footstrap insert and mast track position on windsurf waveboards, kiteboards and SUP.
Anyone could cut a few inches off a Sup then lift the nose and it would near enough ride the same...... but your stance position (or mast track) would not change much, if at all.

Position on a wave board will be different to a cruiser and kinda in between for an allrounder. However try not to overthink it- you have a fair bit of adjustment in a track, plus its only to get you out there and then not use the rig at all on a wave. If you were 4: off, you can move your stance by 4" so its not going to be fatal (like really bad footstrap placement on a WS board for example)

I say use the same length board with similar rocker in the back half as a guide. If the midpoint to tail rocker is +/- say 10mm then use same track position

olskool
QLD, 1407 posts
19 Jun 2019 8:36PM
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Mark, the Bics ive seen have a lot flatter tail rocker than mine. This thing turns pretty easily. Will try get some rocker measurements 2moz n post em.

forceten
730 posts
19 Jun 2019 10:24PM
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ducati said..

DavidJohn said..
I'd be measuring it from the tail.. Not the nose.



I've got a 11'6 (350cm) Bic windsup and a 10'9 (328cm) Jp windsup and both are the same,
1950cm from the tail to the centre of the mast track


The board is 328cm/350 cm long, the measure you are giving is 1950cm ...to the center of the box

how is dah ?.

forceten
730 posts
19 Jun 2019 11:07PM
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DavidJohn said..
I'd be measuring it from the tail.. Not the nose.


I have only seen 1 board company ever, make measures from the nose, Patrik, exception may be the 30cm nose with.
everyone else uses the tail to measure, all measures, yes that's almost 100%.

TARDYS center placement from tail is 187.5cm. I still don't care when half way is, but 320 /2 = ....

Next, why someone makes a statement with feet and inches, then measures from the nose in meters, and others then continue to add fuel to a fire using weird ****, including me, who confuses himself, with nose meters , when it should be tail. Cm should be the measure and from the tail . Because SUP people don't understand cm, they label the boards in inches.

the carry handle , is stated at half way, 160cm, then it's stated as 165cm-175 cm, confused if it's now from nose or tail.

the board was made as a SUP, the carry handle will probably be in the way of a mast track. BIC , I purchased mine because my company sold them, at a wholesale price to employees. It was ok, it was fun.
i placed the mast track as a Exocet windsup had theirs , my board length compared to it. I lost the carry handle in installation.

Your priority may differ on placement. My opinion is I didn't want the carry handle as much as I wanted the track in the correct place.

I would start with a clean slate.

You never addressed that measures made on different boards the same length by 30cm?


olskool
QLD, 1407 posts
20 Jun 2019 1:15AM
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olskool said..
Forceten. Tardys board with non adjustable position is 132cm from nose. Well forward of centre.
Bic Windsups are centrally located on board length. Roughly 162cm to centre of track on a 324cm (10'6").
162-132=30.



FORCETEN
Theres the Math again. I used from nose measurement bcoz Tardy did so.
Ducati then says his are both the same measurement from tail for two vastly different length board, just to make it even more confusing/ apparent.
Im an Aussie tradie n can actually measure in metric or imperial.
Also comfy with conversion from one to the other. Easy peasy.
Mark has since explained why its measured from the tail. Makes sense. He also says rocker will effect placement. All good.
You keeping up with all this ?? This is exactly why i posted this thread, To find the standard n some actual measurements for location on boards. The handle in a sup is actually placed where the the board balances. Which due to 3 fins n finboxes weight, would naturally be slightly closer to tail.
Dont worry your little ol brain about it.

forceten
730 posts
19 Jun 2019 11:34PM
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Select to expand quote
olskool said..

olskool said..
Forceten. Tardys board with non adjustable position is 132cm from nose. Well forward of centre.
Bic Windsups are centrally located on board length. Roughly 162cm to centre of track on a 324cm (10'6").
162-132=30.



Forceten im a big boy n can measure in matric or


Kool matric... not metric, the prob is being compounded



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"Sup to windsup conversion" started by olskool