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Created by VCRWoody 2 months ago, 17 Mar 2020

Infinity 65, 30-35 knots, 3.7M, 80Kg, SS Freestyle, 87L-69x172, Azymuth

Infinity 65, 30-35 knots, 3.7M, 80Kg, SS Wizard, 105L-76x178, Azymuth

Timecode 68, 25-? knots, 4.2M, 65Kg, SS Wizard, 105L-76x178, CAN17

Timecode 68, 30-35 knots, 3.7M, 80Kg, SS Freestyle, 87L-69x172, Azymuth

Timecode 68, 30-35 knots, 3.7M, 80Kg, SS Wizard, 105L-76x178, Azymuth

Infinity 76, 5-? knots, 5.9M, Kg, SS Wizard, 125L-79x178, keith stark

Infinity 76, 5-8 knots, 7.8M, 65Kg, NP One Convertible, 134L-80x134, CAN17

Infinity 76, 5-8 knots, 7.8M, 65Kg, JP Hydrofoil, 135L-85x214, CAN17

Infinity 76, 8-10 knots, 6.5M, 80Kg, SS Wizard, 105L-76x178, Azymuth

Infinity 76, 8-? knots, 8.2M, 100Kg, SS Levitator, 160L-86x213, Johnm

Infinity 76, 10-20 knots, 5.3M, 69Kg, SS Wizard, 105L-76x178, Sambucabarnes

Infinity 76, 10-16 knots, 6.6M, 71Kg, SS Dialer, 130L-70x229, andy winky

Infinity 76, 10-? knots, 7M, 100Kg, SS Levitator, 160L-86x213, Johnm

Infinity 76, 12-20 knots, 4M, 90Kg, SS Wizard, 125L-79x178, Sunsetsailboards

Infinity 76, 14-? knots, 6.2M, 100Kg, SS Levitator, 160L-86x213, Johnm

Infinity 76, 18-25 knots, 4.2M, 65Kg, NP One Convertible, 134L-80x134, CAN17

Infinity 76, 18-25 knots, 4.2M, 65Kg, JP Hydrofoil, 135L-85x214, CAN17

Infinity 76, 20-20-Plus knots, 4M, 69Kg, SS Wizard, 105L-76x178, Sambucabarnes

Infinity 76, 20-? knots, 5.7M, 100Kg, SS Levitator, 160L-86x213, Johnm

Infinity 76, ? ? knots, 4.2M, 90Kg, SS Freestyle, 115L-71x188, Jameos

Infinity 76, ? ? knots, 5.4M, 90Kg, SS Freestyle, 115L-71x188, Jameos

Infinity 84, 5-10 knots, 7.8M, 92Kg, JP Hydrofoil, 135L-86x215, Texas foiling

Infinity 84, 5-8 knots, 8M, ?Kg, JP Hydrofoil, 155L-90x220, liquidsl55

Infinity 84, 5-15 knots, 9.6M, 85Kg, Exocet RF 91, 160L-91x230, Oscardog

Infinity 84, 8-10 knots, 6.5M, 80Kg, SS Wizard, 105L-76x178, Azymuth

Infinity 84, 9-16 knots, 5M, 92Kg, JP Hydrofoil, 135L-86x215, Texas foiling

Infinity 84, 10-? knots, 8.5M, 80Kg, SB Formula, 160L-100x210, WillyWind

Infinity 84, 10-20 knots, 7.5M, 85Kg, Exocet RF 91, 160L-91x230, Oscardog

Infinity 84, 10-20 knots, 7M, 85Kg, Exocet RF 91, 160L-91x230, Oscardog

Infinity 84, 11-17 knots, 6.5M, 90Kg, Slalom, 117L-71x?, Boardsurfr

Infinity 84, 12-18 knots, 6.5M, 83Kg, SS Wizard, 125L-79x198, Windbot/Adam2

Infinity 84, 12-18 knots, 6.4M, 100Kg, Old Formula, ?L-95x?, Awalkspoiled

Infinity 84, 12-? knots, 5.1M, 100Kg, Old Formula, ?L-95x?, Awalkspoiled

Infinity 84, 13-20 knots, 5.6M, 90Kg, Slalom, 117L-71x?, Boardsurfr

Infinity 84, 14-20 knots, 5.8M, 100Kg, Old Formula, ?L-95x?, Awalkspoiled

Infinity 84, 15-23 knots, 5M, 83Kg, SS Wizard, 125L-79x198, Windbot/Adam2

Infinity 84, 15-20 knots, 5.7M, 85Kg, Exocet RF 91, 160L-91x230, Oscardog

Infinity 84, 15-20-Plus knots, 5M, 90Kg, Formula, ?L- ?x?, Boardsurfr

Infinity 84, ? 30 knots, 4.2M, 80Kg, SB Formula, 161L-100x210, WillyWind

Infinity 99, 5-10 knots, 8M, ?Kg, JP Hydrofoil, 155L-90x220, liquidsl55

Infinity 99, 7-10 knots, 5.8M, 92Kg, SS Wizard, 125L-79x198, Coreadventuresports

RRD-ALU-2 80, 9-18 knots, 7.7M, 100Kg, Formula, 167L-N/AN/A, Foilarg

RRD-ALU-2 80, 18-? knots, 5M, 100Kg, Formula, 167L-N/AN/A, Foilarg

Infinity 99, 14-18 knots, Duotone Wing 4.0M, 90Kg, SS Outwit, 100L-64x178, Sunsetsailboards

Infinity 84, 14-18 knots, Duotone Wing 5.0M, 90Kg, SS Outwit, 100L-64x178, Sunsetsailboards

Infinity 99, 14-18 knots, Duotone Wing 4.0M, 90Kg, Fanatic Sky Sup/WS, 142L-76x211, Sunsetsailboards

Infinity 84, 14-18 knots, Duotone Wing 5.0M, 90Kg, Fanatic Sky Sup/WS, 142L-76x211, Sunsetsailboards

Horue LW, 10-12 knots, 8.5M-Sailworks,85Kg, starbord f-type, 158L-100x231-9Kg, antonmik

Horue XLW, 8-10 knots, 9.4M-Neilpryde,85Kg, starbord f-type, 158L-100x231-9Kg, antonmik

Horue XLW, 8-10 knots, 9.6M-Northwarp85Kg, starbord free formula, 198L-90x280-11Kg, antonmik

Horue XXLW, 6-8 knots, 9.4M-Neilpryde,85Kg, starbord f-type, 158L-100x231-9Kg, antonmik

Horue XXLW, 6-8 knots, 9.6M-Northwarp85Kg, starbord free formula, 198L-90x280-11Kg, antonmik

Horue XXLW, 8-10 knots, 8.5M-Sailworks,85Kg, starbord f-type, 158L-100x231-9Kg, antonmik

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Thank You all.

Infinity 65, 30-35 knots, 3.7M, 80Kg, SS Freestyle, 87L-69x172, Azymuth

Infinity 65, 30-35 knots, 3.7M, 80Kg, SS Wizard, 105L-76x178, Azymuth

Timecode 68, 25-? knots, 4.2M, 65Kg, SS Wizard, 105L-76x178, CAN17

Timecode 68, 30-35 knots, 3.7M, 80Kg, SS Freestyle, 87L-69x172, Azymuth

Timecode 68, 30-35 knots, 3.7M, 80Kg, SS Wizard, 105L-76x178, Azymuth

Infinity 76, 5-? knots, 5.9M, Kg, SS Wizard, 125L-79x178, keith stark

Infinity 76, 5-8 knots, 7.8M, 65Kg, NP One Convertible, 134L-80x134, CAN17

Infinity 76, 5-8 knots, 7.8M, 65Kg, JP Hydrofoil, 135L-85x214, CAN17

Infinity 76, 8-10 knots, 6.5M, 80Kg, SS Wizard, 105L-76x178, Azymuth

Infinity 76, 8-? knots, 8.2M, 100Kg, SS Levitator, 160L-86x213, Johnm

Infinity 76, 10-20 knots, 5.3M, 69Kg, SS Wizard, 105L-76x178, Sambucabarnes

Infinity 76, 10-16 knots, 6.6M, 71Kg, SS Dialer, 130L-70x229, andy winky

Infinity 76, 10-? knots, 7M, 100Kg, SS Levitator, 160L-86x213, Johnm

Infinity 76, 12-20 knots, 4M, 90Kg, SS Wizard, 125L-79x178, Sunsetsailboards

Infinity 76, 14-? knots, 6.2M, 100Kg, SS Levitator, 160L-86x213, Johnm

Infinity 76, 18-25 knots, 4.2M, 65Kg, NP One Convertible, 134L-80x134, CAN17

Infinity 76, 18-25 knots, 4.2M, 65Kg, JP Hydrofoil, 135L-85x214, CAN17

Infinity 76, 20-20-Plus knots, 4M, 69Kg, SS Wizard, 105L-76x178, Sambucabarnes

Infinity 76, 20-? knots, 5.7M, 100Kg, SS Levitator, 160L-86x213, Johnm

Infinity 76, ? ? knots, 4.2M, 90Kg, SS Freestyle, 115L-71x188, Jameos

Infinity 76, ? ? knots, 5.4M, 90Kg, SS Freestyle, 115L-71x188, Jameos

Infinity 84, 5-10 knots, 7.8M, 92Kg, JP Hydrofoil, 135L-86x215, Texas foiling

Infinity 84, 5-8 knots, 8M, ?Kg, JP Hydrofoil, 155L-90x220, liquidsl55

Infinity 84, 5-15 knots, 9.6M, 85Kg, Exocet RF 91, 160L-91x230, Oscardog

Infinity 84, 8-10 knots, 6.5M, 80Kg, SS Wizard, 105L-76x178, Azymuth

Infinity 84, 9-16 knots, 5M, 92Kg, JP Hydrofoil, 135L-86x215, Texas foiling

Infinity 84, 10-? knots, 8.5M, 80Kg, SB Formula, 160L-100x210, WillyWind

Infinity 84, 10-20 knots, 7.5M, 85Kg, Exocet RF 91, 160L-91x230, Oscardog

Infinity 84, 10-20 knots, 7M, 85Kg, Exocet RF 91, 160L-91x230, Oscardog

Infinity 84, 11-17 knots, 6.5M, 90Kg, Slalom, 117L-71x?, Boardsurfr

Infinity 84, 12-18 knots, 6.5M, 83Kg, SS Wizard, 125L-79x198, Windbot/Adam2

Infinity 84, 12-18 knots, 6.4M, 100Kg, Old Formula, ?L-95x?, Awalkspoiled

Infinity 84, 12-? knots, 5.1M, 100Kg, Old Formula, ?L-95x?, Awalkspoiled

Infinity 84, 13-20 knots, 5.6M, 90Kg, Slalom, 117L-71x?, Boardsurfr

Infinity 84, 14-20 knots, 5.8M, 100Kg, Old Formula, ?L-95x?, Awalkspoiled

Infinity 84, 15-23 knots, 5M, 83Kg, SS Wizard, 125L-79x198, Windbot/Adam2

Infinity 84, 15-20 knots, 5.7M, 85Kg, Exocet RF 91, 160L-91x230, Oscardog

Infinity 84, 15-20-Plus knots, 5M, 90Kg, Formula, ?L- ?x?, Boardsurfr

Infinity 84, ? 30 knots, 4.2M, 80Kg, SB Formula, 161L-100x210, WillyWind

Infinity 99, 5-10 knots, 8M, ?Kg, JP Hydrofoil, 155L-90x220, liquidsl55

Infinity 99, 7-10 knots, 5.8M, 92Kg, SS Wizard, 125L-79x198, Coreadventuresports

RRD-ALU-2 80, 9-18 knots, 7.7M, 100Kg, Formula, 167L-N/AN/A, Foilarg

RRD-ALU-2 80, 18-? knots, 5M, 100Kg, Formula, 167L-N/AN/A, Foilarg

Infinity 99, 14-18 knots, Duotone Wing 4.0M, 90Kg, SS Outwit, 100L-64x178, Sunsetsailboards

Infinity 84, 14-18 knots, Duotone Wing 5.0M, 90Kg, SS Outwit, 100L-64x178, Sunsetsailboards

Infinity 99, 14-18 knots, Duotone Wing 4.0M, 90Kg, Fanatic Sky Sup/WS, 142L-76x211, Sunsetsailboards

Infinity 84, 14-18 knots, Duotone Wing 5.0M, 90Kg, Fanatic Sky Sup/WS, 142L-76x211, Sunsetsailboards

Thank you WCRWoody, so would you now be able to draw some graphics/lines, to extrapolate aka to cover how the wind/sail size matrix would look like for me, being a 70kg person, with an Infinity 84cm foiland the Levitator 150 board?

I would assume that the body weight, foil wing size and then the sail size would be the main denominators to draw that curve and less so the board itself (though its weight adds to the equation). Hence, I would think you would be able to get to the logic conclusion better if you simply converted the board info into the weight instead and added that together with the body weight.

If I were you I'd start with more sail - like a 6-something - in decent wind, with the wing in C and the mastfoot pretty far back, like 41.5" from the front bolt, because with that setup you'll for sure be flying. Eventually at your light weight I bet you'll want to move the wing back a little to B and drop way down in sail size but that initial setup will give you time in the air at least.

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Cyber - other more experienced foilers may have another perspective, but from what I've observed, at your size with that massive wing your success will depend far less on board or sail size than on how well you pump. Lots of skilled sailors hereabouts will not foil on anything bigger than about 4.7 on the little SS Freestyle, in 10knots or even less, because they're up and planing so quickly. Since you're used to small wave-gear my guess is you'll need very little more sail than that once you're past the first few days' struggle (And I think the Levitator will feel big quickly too).

If I were you I'd start with more sail - like a 6-something - in decent wind, with the wing in C and the mastfoot pretty far back, like 41.5" from the front bolt, because with that setup you'll for sure be flying. Eventually at your light weight I bet you'll want to move the wing back a little to B and drop way down in sail size but that initial setup will give you time in the air at least.

Wow Walkspoiled, that sounds exactly to be what I am really looking so much forward to experience!

The last many years of wave windsurfing I never even owned a sail larger than 5 m2, and I had no uphaul line on either, as my boards were so small that doing an uphaul start was not even possible. So waterstarts and non-stop planning was required to stay 'alive out there'. ;o)

Now all I dream about is just getting back out there on the water, enjoy easy planning without the need for crazy windy conditions. And also without the requirement for big heavy sails and equipment. But I have though also bought a 6 m2 sail next to a 5 m2 sail (both Ezzy Hydra, the masts to fit and boom to exact fit), so hope that will suffice to get me started.

So you are probably very right about the Levitator 150 may quickly start to feel like a block of cement on my feet, but wanted also to assure I could start with this foiling venture in a comfortable way without too many exhausting splashes into the water.

I will try and do some data extrapolation of the numbers that VCRWoody and all of you so kindly compiled, but just looking at first glance, it does indeed look as great chance for planning for me with the 6 m2 sail in potentially less than 8-10 knot winds?!?

Are you proposing that I should start out with the Infinity wing in position B?

Look at the I76 data for the low wind range, the I86 should be able to use smaller sail sizes.

Copy and paste data to a spreadsheet. For LibreOffice I use "Data-Text to column" check the comma box option for Separator.

Graph to your hearts content!

I would suggest review skills for FINNING Non-planing Gybes and Tacks. Lots of good Youtube tutorial videos.

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Cyber - other more experienced foilers may have another perspective, but from what I've observed, at your size with that massive wing your success will depend far less on board or sail size than on how well you pump. Lots of skilled sailors hereabouts will not foil on anything bigger than about 4.7 on the little SS Freestyle, in 10knots or even less, because they're up and planing so quickly. Since you're used to small wave-gear my guess is you'll need very little more sail than that once you're past the first few days' struggle (And I think the Levitator will feel big quickly too).

If I were you I'd start with more sail - like a 6-something - in decent wind, with the wing in C and the mastfoot pretty far back, like 41.5" from the front bolt, because with that setup you'll for sure be flying. Eventually at your light weight I bet you'll want to move the wing back a little to B and drop way down in sail size but that initial setup will give you time in the air at least.

Wow Walkspoiled, that sounds exactly to be what I am really looking so much forward to experience!

The last many years of wave windsurfing I never even owned a sail larger than 5 m2, and I had no uphaul line on either, as my boards were so small that doing an uphaul start was not even possible. So waterstarts and non-stop planning was required to stay 'alive out there'. ;o)

Now all I dream about is just getting back out there on the water, enjoy easy planning without the need for crazy windy conditions. And also without the requirement for big heavy sails and equipment. But I have though also bought a 6 m2 sail next to a 5 m2 sail (both Ezzy Hydra, the masts to fit and boom to exact fit), so hope that will suffice to get me started.

So you are probably very right about the Levitator 150 may quickly start to feel like a block of cement on my feet, but wanted also to assure I could start with this foiling venture in a comfortable way without too many exhausting splashes into the water.

I will try and do some data extrapolation of the numbers that VCRWoody and all of you so kindly compiled, but just looking at first glance, it does indeed look as great chance for planning for me with the 6 m2 sail in potentially less than 8-10 knot winds?!?

Are you proposing that I should start out with the Infinity wing in position B?

No, I think you should definitely start with the wing in C just because you'll have to work so much less to get it flying. Likewise starting with a bigger sail, in stronger than minimal winds. My reasoning is that it's a LOT more fun and a lot less frustrating if you're trying to stay down than if you're trying to get up. You won't foil out all that much even if you're a little overpowered, because believe me, you're going to freak out and power down long before you foil out, at least at first. So, if I were you I'd start with the 6m Hydra in like 12-14 - in other words nearly planing conditions, and just get the feel of flying. I do think you'll wind up with the foil back in B (and probably wind up with an i76 or even smaller wing), but don't start there.

Foiling in LESS than 8 seems to be more about huge sails, pumping efficiency and efficient, expensive foils, but I bet you can get that Ezzy up in 10 once you've got a little sense of how it all works.

Can observe that some data points are clearly outliers and that we do not yet have sufficient data points and sufficient quality on them (most probably the wind speed, as many reported a very high range of those, aka high uncertainty. So here I took towards the highest point within the range quoted, to assure solid planning/flying speed was present)

As we start to get more data, then these trends should become clearer.

Maybe wishful thinking, but we should start to observe parallel lines between the different surfer body weights. going from top left and across down to bottom right. This will then also start to give us indicators on what body weight has of impact on appropriate sail size for any given wind speed.

And ultimately, we can then also start to benchmark one foil wing versus another, so as to says what sail size is required for each foil wing size with aka the same wind strength.

you can plug in my weight where it is missing.

Am thinking I was the cause of blue 85kg line on your chart going perpendicular to what it should. That is because my large 9.6 Gaastra Vapor sail was not good for foiling. Now that I have had some time on my new 7.0 Severne Foil Glide, won't be foiling on my 9.6 Gaastra Vapor again. The 7.0 will be for 8-20mph, and 5.7 for 15-25mph.

Added also a trend line for each weight group. Which in theory ought to give us a linear line for each. But for both the 85kg and 100kg segments we have just few observation points, where we also appear to have some radical outliers, aka where one group are sailing in less wind with a smaller sail and another group is sailing in stronger winds with an even bigger sail. So in principle against 'normal logic'. Maybe pure luck, but both the 80kg and the 90kg segments are lining up fairly well and follow same angle of trend in terms of required sail size by wind speed !

I still think that the biggest 'unknown' to us, or the cause for variance, is the challenge to observe the wind speed correctly. Quite a tricky thing to do, that also very experienced sailors are challenged to get right, if not using a calibrated anemometer tool.

Over time as we get more and more data points accumulated, then this type of mapping out will also then start to provide a more consistent and certain result that we can rely on.

Select to expand quote

Cyber - other more experienced foilers may have another perspective, but from what I've observed, at your size with that massive wing your success will depend far less on board or sail size than on how well you pump. Lots of skilled sailors hereabouts will not foil on anything bigger than about 4.7 on the little SS Freestyle, in 10knots or even less, because they're up and planing so quickly. Since you're used to small wave-gear my guess is you'll need very little more sail than that once you're past the first few days' struggle (And I think the Levitator will feel big quickly too).

If I were you I'd start with more sail - like a 6-something - in decent wind, with the wing in C and the mastfoot pretty far back, like 41.5" from the front bolt, because with that setup you'll for sure be flying. Eventually at your light weight I bet you'll want to move the wing back a little to B and drop way down in sail size but that initial setup will give you time in the air at least.

Wow Walkspoiled, that sounds exactly to be what I am really looking so much forward to experience!

The last many years of wave windsurfing I never even owned a sail larger than 5 m2, and I had no uphaul line on either, as my boards were so small that doing an uphaul start was not even possible. So waterstarts and non-stop planning was required to stay 'alive out there'. ;o)

Now all I dream about is just getting back out there on the water, enjoy easy planning without the need for crazy windy conditions. And also without the requirement for big heavy sails and equipment. But I have though also bought a 6 m2 sail next to a 5 m2 sail (both Ezzy Hydra, the masts to fit and boom to exact fit), so hope that will suffice to get me started.

So you are probably very right about the Levitator 150 may quickly start to feel like a block of cement on my feet, but wanted also to assure I could start with this foiling venture in a comfortable way without too many exhausting splashes into the water.

I will try and do some data extrapolation of the numbers that VCRWoody and all of you so kindly compiled, but just looking at first glance, it does indeed look as great chance for planning for me with the 6 m2 sail in potentially less than 8-10 knot winds?!?

Are you proposing that I should start out with the Infinity wing in position B?

I don't thing you will find the levitator a block of cement. I use it as my lightwind board with 99 and i really appreciate the volume and stability for schlogging to the wind line and uphauling. I have my masttrack pretty far back and it is plenty turny. If you do intend to foil in normal bump and jump winds then adding a smaller board might be ideal, but i get the impression that is not your goal.

- I76 graph (maybe a year from now a I99 graph)

- for each 80kg and 90kg graph I76 vs I84.

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Goodwork Cyber. Some fun with numbers.

- I76 graph (maybe a year from now a I99 graph)

- for each 80kg and 90kg graph I76 vs I84.

OK Woody,

Thanks for the challenge. So you want me to add more foil options also, into same graph?

Aka to benchmark how much sail size for various windspeed, for sailors at same weight but then on the 76cm vs the 84 cm wing?

We may indeed have sufficient data points for the 80kg and 90kg data series to make something valuable out of it.

Will give it a try this evening!

Used approximation for the wind speed for some data points, as quoted ranges were very broad...

Here is mine (roughly, in aqua) for the 76 (I don't have the 84) at 65kg/140lbs

Strapless on custom 110L board, in reality my smallest used was flat 3.7 KS3 in 25 knots but could have used a 3.0 for sure.

Indeed, we can add more foils and weights going forward, but suggest we do that first when we have a broader set of data points observed by more windfoilers out there. Already those we have now are borderline, as we only have like 3-4 data points for each.

But you are indeed picking out the very interesting patterns that starts to appear from the graph:

Aka, on same foil size and in same wind strength, then a person weighing 10kg less can do with a sail size appox. 1.0 m2 smaller.

Likewise, a person needs approx. 8 knots more of wind with same sail size, if switching from the 84cm foil to the 76cm foil.

Or can do fine in same wind with 1.5m2 less sail size if going from 76cm to the 84 cm foil.

(all assumptions based on these very limited data points that we have so far of course... )

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Thank you drlazone!

Indeed, we can add more foils and weights going forward, but suggest we do that first when we have a broader set of data points observed by more windfoilers out there. Already those we have now are borderline, as we only have like 3-4 data points for each.

But you are indeed picking out the very interesting patterns that starts to appear from the graph:

Aka, on same foil size and in same wind strength, then a person weighing 10kg less can do with a sail size appox. 1.0 m2 smaller.

Likewise, a person needs approx. 8 knots more of wind with same sail size, if switching from the 84cm foil to the 76cm foil.

Or can do fine in same wind with 1.5m2 less sail size if going from 76cm to the 84 cm foil.

(all assumptions based on these very limited data points that we have so far of course... )

I appreciate the work, hopefully you'll get more data

Meanwhile I though I'd share how I see my graph according to sail size and wind speed (KS3 5.8/4.9/4.3/3.7/3.4), sorry very messy

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Thank you drlazone!

Indeed, we can add more foils and weights going forward, but suggest we do that first when we have a broader set of data points observed by more windfoilers out there. Already those we have now are borderline, as we only have like 3-4 data points for each.

But you are indeed picking out the very interesting patterns that starts to appear from the graph:

Aka, on same foil size and in same wind strength, then a person weighing 10kg less can do with a sail size appox. 1.0 m2 smaller.

Likewise, a person needs approx. 8 knots more of wind with same sail size, if switching from the 84cm foil to the 76cm foil.

Or can do fine in same wind with 1.5m2 less sail size if going from 76cm to the 84 cm foil.

(all assumptions based on these very limited data points that we have so far of course... )

I appreciate the work, hopefully you'll get more data

Meanwhile I though I'd share how I see my graph according to sail size and wind speed (KS3 5.8/4.9/4.3/3.7/3.4), sorry very messy

Oh sorry drlazone,

I did not understand from your initial post that you had indeed already several data points. So with those I am of course OK to update the graph to get those included!

Please just confirm the following data points, as trying to read from your markers on the graph:

Windfoil: Infinity 76cm.

Weight: 65 kg.

21knots / 3.2m2.

19knots / 3.6m2.

17knots / 4.2m2.

14knots / 4.9m2.

12knots / 5.7m2.

5 - 20 Knot, 5.7 - 9.6 M, Exocet RF 91 160L-91x230

5 - 25 Knot, 4.2 - 7.8 M, JP Hydrofoil 135L-85x214

5 - 25 Knot, 4.2 - 7.8 M, NP One Convertible 134L-80x134

5 - 23 Knot, 4.0 - 6.5 M, SS Wizard 125L-79x178

8 - 20 Knot, 5.7 - 8.2 M, SS Levitator 160L-86x213

8 - 35 Knot, 3.7 - 6.5 M, SS Wizard 105L-76x178

10 - 30 Knot, 4.2 - 8.5 M, SB Formula 161L-100x210

10 - 16 Knot, ?? - 6.6 M, SS Dialer 130L-70x229

11 - 20 Knot, 5.6 - 6.5 M, Slalom 117L-71x?

12 - 20 Knot, 5.1 - 6.4 M, Formula

18 - 20 Knot, 3.7 - ?? M, SB Go 122L-72x246

30 - 35 Knot, 3.7 - 5.2 M, SS Freestyle 87L-69x172

Thanks for doing the graph, you have certainly gone beyond my origiinal expection of the information. If you wish to continue; I would suggest you specify exactly the data/format that will make it easier for you;. Post the specification with the graph. Update the graph only when there's at least 3 or 4 new datasets. I would also request additional data on I65, I99 or weight class and when appropriate stop collecting data where there is a trend...Cheers

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I did not understand from your initial post that you had indeed already several data points. So with those I am of course OK to update the graph to get those included!

Please just confirm the following data points, as trying to read from your markers on the graph:

Windfoil: Infinity 76cm.

Weight: 65 kg.

21knots / 3.2m2.

19knots / 3.6m2.

17knots / 4.2m2.

14knots / 4.9m2.

12knots / 5.7m2.

Yes, very approximative wind range.I find foils allows for much wider range in sails

Those are my (now distant) memory from sessions last year.I did not keep track of actual wind speed.Also I don't look at the minimum wind speed but at the gusts.I rig for gusts, which gets me going, then once foiling, low end of the speed does not matter. This allows for much smaller sail sizes (typically 2 size smaller , or about at least 1m less than on fin).

Indeed a foil allows for a way bigger windrange for a given sail then is possible with a fin, I often rig 3.8 or 3.0 to go freeride foiling with mates and then switch to 9.0 (4-cam foilrace) when my racing buddies arrive in the same exact conditions. I can use my 9.0 and 7.0 (freeride 1cam) on the foil in resp. 5 or 8 knots until way over what would be comfortable on a normal board (25+ knots for both my 9.0 and 7.0)!!!

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I'm a statician and plots get me excited, I'd go with a 3D plot, X axis windspeed, Y axis sailsize and Z axis rider weight ;). ggplot in R should be able to make that possible for you without too much difficulty (dont know what maths software you use).

Indeed a foil allows for a way bigger windrange for a given sail then is possible with a fin, I often rig 3.8 or 3.0 to go freeride foiling with mates and then switch to 9.0 (4-cam foilrace) when my racing buddies arrive in the same exact conditions. I can use my 9.0 and 7.0 (freeride 1cam) on the foil in resp. 5 or 8 knots until way over what would be comfortable on a normal board (25+ knots for both my 9.0 and 7.0)!!!

Ha! I am a messing around with r and ggplot right now. Have not tried a 3D plot but you just motivated me to give it a go.

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I'm a statician and plots get me excited, I'd go with a 3D plot, X axis windspeed, Y axis sailsize and Z axis rider weight ;). ggplot in R should be able to make that possible for you without too much difficulty (dont know what maths software you use).

Indeed a foil allows for a way bigger windrange for a given sail then is possible with a fin, I often rig 3.8 or 3.0 to go freeride foiling with mates and then switch to 9.0 (4-cam foilrace) when my racing buddies arrive in the same exact conditions. I can use my 9.0 and 7.0 (freeride 1cam) on the foil in resp. 5 or 8 knots until way over what would be comfortable on a normal board (25+ knots for both my 9.0 and 7.0)!!!

Ha! I am a messing around with r and ggplot right now. Have not tried a 3D plot but you just motivated me to give it a go.

Good to hear WhiteofHeart, I work with biostats in human healthcare, so we can go wild deep into tech and fancy tools. Though think we will not need to roll out the big cannons just yet to capture and illustrate what we need here for the windfoiling. But maybe thedorr will come back with some fancy 3d interactive graphic modeling that we all can take a ride into?

Could of course have been fun and cool with an interactive and live 3-d graph options, but then the webserver would need to have that plugged in to work for us and the web visitors...

So instead here below just a boring 2-d update on the data so far...

But it is obvious that the data points for the 84cm fin are questionable, as a heavy foiler has reported using smaller sail size in same wind, versus a lighter foiler in same wind reporting using a bigger sail. (the orange and the red are for the 84cm wing. By default, one would expect to have the lighter foiler (orange line) to have been below the red line of the heavier foiler. I am still seriously doubtful (sorry no offense to any individual out there) about the accuracy with which the wind speed has been reported here. It truly takes many years of experience just to 'sense that' and also use of a anemometer to truly get it correct. Most windsurfers tended always to overestimate when assessing the windspeed versus what it truly was when measured accurately with a calibrated tool.

The dark blue is for the heavier windfoiler on the 76cm wing and the light blue is the lighter windfoiler on that same wing. The linear lines representing these are placed as expected, with the dark red heavier above the lighter orange below. And both lines fairly parallel also.

As we now have many data points for the 65kg 76cm wing, then I removed the two data points that we had for the 70kg of this. and wait until we have minimum 4 data points confirmed before plotting them in.

Likewise I updated the graph so now all observed data points are shown as dotted points in the graph and only the linear trend line is marked up, to represent that wing size and weight by best fit through all the observed data points.

I also switched the wind versus sail size axis, so its more intuitive now to read the graph as sail size as function of the windspeed.

(btw personally I always used m/s here in Europe, so this 'knots' for windspeed is really a foreign substance for me to relate to... But I could of course also add an additional axis unit next to it, to have both in same... ;o) )

Sailor weight.

Infinity wing size.

Wind speed.

Sail size.

Infinity 84 / 8-13 knots - Ezzy Hydra Pro 8.5 / 10-16 knots Ezzy Hydra Pro 7.0

Infinity 76 / 12-16 knots Ezzy Hydra Pro 7.0 / 14-18 knots 5.7 / 18-22 knots 4.5 / 22+ need something smaller!

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1. Possibly the sample of heavy i84 foilers are better pumpers than the sample of light i84 foilers

2. I am 85kg and use 7m in 8 through 15 knots, and a 5.8 in 15-20knots, and am not a great pumper. Of course, to support your point on uncertainty of wind speed reporting, above i reported "The 7.0 will be for 8-20mph, and 5.7 for 15-25mph."

I added the additional data points to the graph and also created the new group of 84cm foil and 90 kg with data from fast505 to it!

Still surprised about the variation about wind strength and sail size used compared between the different windfoilers and their weight classes. But at least we now got more data points included where the 84cm 90kg class is using bigger sails in same wind versus the 80kg class. And they are still indicating also 'the expected logic' that a same weight windfoiler on a 76cm foil needs more wind versus when he/she is on the 84cm foil and using same sail size.

As I still have to even try it myself the first time, this might be a silly question, but here we go:

Is the sensitivity for being sail-overpowered on a windfoil the same as on traditional windsurfing?

If the windfoiling is less sensitive, then it might explain why some appear to go out in higher winds despite keeping a big sail on still? Or do you think that is ore a sign of a still 'newish windfoil beginner' who needs this (too much) power to get lifted out of the water to get to fly mode, while more experienced and good pumpers knows how to accomplish this with less sail and thereby have the advantage of more 'right sized sail' when getting into the fly mode?