Went out today with SS 84 in position "C", standard stab, 90 cm mast. Wind 10-12 knots, sail Ezzy Elite 6.8, board JP foil 155. My weight 88kg.
Perfectly balanced, two hours of unhurried bliss, not worrying about high speed injuries I often get on a race foil
It does feel quite a bit slower than 76, but I pushed it to 18 knots at times. Never breached out. For me position C seems perfect.

nerdycross said..

CoreAS said..
The 84 is phenomenal foil (76 is quick and 68 is a high wind maestro)...

foiled tonight in super flukey 8-18+ mph with a 5.0 (JP 135) and it fly's through holes like nothing else and I'm 92 kilos, have yet to foil anything else like it.

I'm looking to buy a JP 135 and a slingshot 76 do just for light wind stuff do they work ok together?
I'm 80 kilo and bin windsurfing 35 + years.

I have the setup mentioned. If your worried about how the slingshot deep tuttle head fits into the JP 135 don't be because it fits amazing. It is a match made in heaven.
I've only had two runs on it. But can say it has much better lift, stability and a lower stall speed then my old foil( NP alu blue). And much more front foot weighted which I like . Just get the board in the air and it is not very difficult to keep it there. It's very forgiving and doesn't like to breach. Would like to give a better review when I get more TOW/TOF.

nerdycross said..

I'm looking to buy a JP 135 and a slingshot 76 do just for light wind stuff do they work ok together?
I'm 80 kilo and bin windsurfing 35 + years.

You could buy a smaller board - the Infinity 76 doesn't need that much width.

That's weird Simon. Have you tried running your mast in the full rearward position? How about your footstraps further back? I have the 84 with a Wizard 125, I run it in c position with the mast foot typically fully aft or close to it and I have not had this problem. Perhaps a D position is the call as you suggest.

Windbot said..
That's weird Simon. Have you tried running your mast in the full rearward position? How about your footstraps further back? I have the 84 with a Wizard 125, I run it in c position with the mast foot typically fully aft or close to it and I have not had this problem. Perhaps a D position is the call as you suggest.

Good idea. I'll try the mast foot further back but I don't really want to change the footstrap positions as I often change wings. I like to be pretty front footed and the current footstrap positions give me that with the Infinity 76. With the Infinity 65 I'm really front footed - almost too much.

simonp123 said..

Windbot said..
That's weird Simon. Have you tried running your mast in the full rearward position? How about your footstraps further back? I have the 84 with a Wizard 125, I run it in c position with the mast foot typically fully aft or close to it and I have not had this problem. Perhaps a D position is the call as you suggest.

Good idea. I'll try the mast foot further back but I don't really want to change the footstrap positions as I often change wings. I like to be pretty front footed and the current footstrap positions give me that with the Infinity 76. With the Infinity 65 I'm really front footed - almost too much.

I believe the surf and windsurf shims are the same. Yes you don't want to be moving the straps when you change wings. I guess one suggestion would be to have the straps set up so the track is forward for the 76 and 65 and then move the track back for the 84. I had this issue on my freestyle 115, where I needed an unridable amount of back foot pressure to make the 99 work. One solution would have been to move my straps back and move where I position the foil mast (more backward) for the 76/65.

Cyber said..
I got the 84cm front wing together with the 42cm rear wing. I am a total beginner to foiling. Is that not an ideal match then? I see several of you refer to using the 84cm front wing with the larger 48cm rear wing. What does that really make of difference? And is it worth the money for me to get the 48cm already to start out with then, if difference is significant?

I am a very experienced windsurfer down to small home built sinker boards at 70 liters.
A fairly lightweight at 70 kilos. Bought the Levitator 150 board and that slingshot infinity 84cm foil to get started foiling this year. (and still waiting to get out there and try it first time...). Expecting to use sails in 5-6 m2 sizes. Dont wont to use bigger sails than that, but hope still this will suffice to go flying in lightish wind conditions, all considering my low body weight and large foil wing.

Hi Cyber. I would say you made the right choice. The large rear stabilizer is primarily for surf and sup foil and is meant to be used on the short fuselage, which I would argue is no good for windsurfing.

However, some people use the larger rear stabilizer on the long fuse, and some windsurf with the short fuse. I have tried both and do not like either.

SimonP123 said, The one side of the leading edge is nicely rounded but the side nearest the fuse has a very hard edge - more like the trailing edge on most wings / stabs. Does yours look like that?

No, Using a radius gauge I measured about a 1/32 inch radius. I wonder if your picture shows fine line due to the lighting?

lakeeffect said..
SimonP123 said, The one side of the leading edge is nicely rounded but the side nearest the fuse has a very hard edge - more like the trailing edge on most wings / stabs. Does yours look like that?

No, Using a radius gauge I measured about a 1/32 inch radius. I wonder if your picture shows fine line due to the lighting?

It's not the lighting. When I first picked up the wing to check the leading edge I thought I was looking at the trailing edge!

simonp123 said..

mot
That looks like trailing edge to me.

It does look like a trailing edge but this is the leading edge. The trailing edge is much narrower as you would expect. I've never seen a leading edge like this.

Is your leading edge rounded without a well defined line?

Here's some pictures from a different angle:

My first generation Lok?foil (2016 Envol) had wings which looked like that, to be honest, back then I didnt really have much of a problem with it. The next gen Lok? wings which were more rounded were faster, but with the older wings I didnt have any cavitation or stuff like that. Don't think that is your problem although I'd still check whether its right ;).

Dcharlton said..
I like the 48 stabilizer for the 84, it's a heck of a lot more stable when the wind gets gusty or picks up, really controls breaching for me. If you're doing well with the 42, don't rock the boat, but if you're breaching a lot in gusty conditions, you may want to look at the 48.

DC

Good to know, I guess the large stabilizer resist the lift of the front wing.

You using the long fuse?

Hey guys,

Very interesting thread.


I bought the the NP RS:One foil back in 2018 (price was just unbeatable) and sailed about 6-7 times with it that summer, with my SB Formula 147 and a 7.3 2 cams sail (North S-type). Although I had some fun and did a couple of nice flights, in general, I had issues to stay up ; I just felt that the foil lacked of lift for the 10-12 knots range I was trying to sail in most of the time. I was surprised I could bring the board into planing without the foil even lifting the board at all ; If the wind was app. 15 knot ish, I could even windudsurf / plane normally (but a little bit slow due to the full foil and board drag)

So basically I needed to pump on the a plane. And then even pump further to lift (with max pressure on back foot) ... My conclusion is that this foil needs a lot of speed to get up, and it's not a light wind solution. 12 knots is seemed the minimum range, even when pumping. ( I weigh 170 lbs)


In the end, I felt like I lost about 2 knots (or maybe even 3) vs my formula setup and 9.8 sail.So I gave up.... and did mountain biking last summer.

But now I see that new/better wings came out on the market, in particular the Slingshot infinity 84, which has a very large surface area ( 2066 cm2). That's much more than my RS:One foil which has a surface of app 850 cm2 (rough guess since NP does not seem populate this spec) . This should make a huge difference. It looks like you guys have been trying the SS infinity 84 . How do you think it compares with the NP RS:One ? How many knots would I gain on the low end (with pumping).

At 170 Lbs, do you think could I get easily going in 10 knots ? Is a 7.3 sail m2 sail worth it, or 5.8 m2 would be enough ?

Do you think a formula board would work relatively well with this foil (i.e Wing in position C) ? The middle of the back foot strap aligned with the front screw of the tuttle box. So a little bit further forward than on the wizard 125 (for which the deep tuttle box seems direclty aligned with the back foot strap)

What about the the Infinity 99 ? Is it worth it for a relatively light guy ?

I am assuming that the inifnity 76 is a good option, but not the best for light wind. In any case, if could buy it later if this wing is much better for 15-20 knots.

There is also a used Horu Vini pro XLW foil available for sale in my area. How do you think it compares with the SS I84 for light wind ?


Thanks in advance for your advice,

Max.

@ Oscarddog : Do you have the I76 as well, or just the 84 ? I am looking for someone having both to make a comparison. According to Slingshot, the 84 covers 1 knot more on the low end.

170Lbs actually equals to 77kg... So I am afraid that the I76t is a little too small light wind.

Can you enjoy the 84 up to app. 20 knots of wind ? Or does it become a pain to ride beyond 15 knots ?

What do you think should be my next sail down after 5.8 ? Do you think I can go down to 4.7 , or is 5.2 relevant ?


Max.

Hi

Thanks Paducah. Well the RS:one foil works, but it requires so much speed to lift.... In the meantime, read a few other post on the forum which said the same thing. In general, this foil lacks of lift (small wing) and is very back foot heavy. Not really a light wind option. And fuselage is on the short side.


So I will change for a Moses or a Slingshot.The big question is which wing(s) should I get.

The 790/I76 or the 873/I84... or both.

Any thoughts ?

Poimax05 said..
Hi

Thanks Paducah. Well the RS:one foil works, but it requires so much speed to lift.... In the meantime, read a few other post on the forum which said the same thing. In general, this foil lacks of lift (small wing) and is very back foot heavy. Not really a light wind option. And fuselage is on the short side.


So I will change for a Moses or a Slingshot.The big question is which wing(s) should I get.

The 790/I76 or the 873/I84... or both.

Any thoughts ?

I have or had all 4 infinity wings. If you are a big dude I would get the 84 (unless you plan to get the 99 in the future). But if you are a regular dude, who knows how to pump the sail, I would recommend the 76 as it has the largest wind range of all the infinitys (IMHO). Yes you will miss some of the early planning of the 84, but this means you need to schlog a little further to the wind-line or wait a bit more for the wind to come up.

I personally don't feel the slight early foiling of the 84 offsets the loss of maximum speed relative to the 76, unless you live in a chronic lightwind area (meaning your smallest sail for windsurfing is 7.0), but If you want to push the light wind envelope you should probably get the 99 (99 and 76 is a great combo), but the 99 needs a board with tracks.