Hi guys, I've just purchased a new 2020 SB GT-R foil and am wondering what sail sizes for varying conditions most are using.

I'm 85kg and am using it with a 2019 Falcon LW (90 wide).

I have previously used the Naish 1150 with a 95cm alloy mast to great effect. Mainly using the Turbo 7.0 sail.

Just keen to free foil with some nice upwind / downwind angles.

Cheers!

TonyPolony

Hey Tony I love the GT-R, more manageable than Race - especially it will beam reach comfortably whereas Race will not - do you have the Plus fuselage?
I mainly use Hyperglide 8.0 with it on 91 wide board but it is super versatile, I reckon anything from 5.7 wave sail to 9.0 cammed will work on your board no problem
Enjoy!!

Thanks Pete, great to know. Might have to continue to work with the 9.0.
I only have the standard 95 fuse mate. Great to see you getting the most out of your iso at Primbee and Kanahooka

So far: I used severne FG 7.0 / FGO 6.0 and a 4.7 wave Sail, all on my SB 125 foilboard. Happy with all of them. Eventhough next board could be wider and the FG 7.0 2020 version, could have 1 batten more.

Select to expand quote

Tony Wills said..
Thanks Pete, great to know. Might have to continue to work with the 9.0.
I only have the standard 95 fuse mate. Great to see you getting the most out of your iso at Primbee and Kanahooka

Standard fuselage is fine, Plus adds tuning range but I seem to use same shim almost every time
Primbee is not easy! and for me 32 knots feels like 42 used to back in the day - BIG respect to the guys who do 40 plus bearaways in ankle deep water ......

Select to expand quote

Tony Wills said..
Hi guys, I've just purchased a new 2020 SB GT-R foil and am wondering what sail sizes for varying conditions most are using.

I'm 85kg and am using it with a 2019 Falcon LW (90 wide).

I have previously used the Naish 1150 with a 95cm alloy mast to great effect. Mainly using the Turbo 7.0 sail.

Just keen to free foil with some nice upwind / downwind angles.

Cheers!

TonyPolony

I have the same setup and use anything between 6-8m, however i would imagine you could go slightly smaller or larger sails. ie 5m and 9m as pointed out. One really nice addition to the GT-R setup is to add the 1000 front wing as this will allow you to get even more performance in lighter conditions. I use the 7m Turbo as well for most of my sessions....., great lightweight sail!. When conditions get really light i replaced the 95 fuselage with the 115 fuselage and put on the smaller tail wing.

Just got myself a fg2 8.0; seems it's going to be my goto sail !!!
so comfy and stable with those 4 cams !!
Not to mention feather light !!!

I've got an 8.6 Severne Turbo GT that I use in less than 12 knots for foil slalom racing. For foil slalom above 12 or foil course racing I use a Severne FoilGlide 7m, which is a great all-round sail to go with the GTR foil setup.For the BrisVegas foil event in January, I used GTR, 7m FoilGlide and a 130L Fanatic Falcon slalom board to race (in profile picture). It was generally about 15 knots. The biggest thing limiting my angles for the upwind/downwind was not being able to sheet in properly on the tail of the slalom board (narrower back foot width than the parallel rail of a foil board).I've since used that setup on an 87W 145L FutureFly Flying Camel, and that made a dramatic difference to my angles. I've just bought that board to use for slalom and some course racing.You can't go wrong with the FoilGlide as a free foil sail, and then if you want to sail angles upwind and downwind, make sure the board you use is wide enough at the back that you can properly sheet in. The Falcon LW looks like it has a more parallel rail than my 130L, so might be fine.

I use the GTR plus with an 8m v8 flight on the sb150 foil board.
im 86kg and find the 900 front wing is much more appropriate for my size and wind strength I use this with

I've had the 2021 GTR for about a month now and love it. I use it on an Exocet RF 71 (125 ptrs, 71 cm wide) with 4.0, 5.0, & 6.0 Ezzy Hydras and the -1.0 shim.

I learned suing low aspect foils, which were great for getting started but just wanted to go faster and chase fin riders. The GTR seems 2-4 knots faster and I feel like I can push it even harder. Looking to try it with camel sails to eke out even more speed.

A pleasant surprise was ease of turning, definitely requires more foot/rail pressure to turn, but keeps speed better in turns and relatively easy to keep flying through turns.

Select to expand quote

seanhogan said..
Just got myself a fg2 8.0; seems it's going to be my goto sail !!!
so comfy and stable with those 4 cams !!
Not to mention feather light !!!

My G4 8.0 is arriving tomorrow

Keen to hear how the 8.0 works with the GTR as I have 7.0 & 8.5 Hydras that I can use for it as well. Just been too windy for those so far this year , but light wind season is coming

First ride on the GT-R with the Severne HG4 8.0 today. Was super light with a mate and myself basically chasing gusts.

The 8.0 and the GTR went extremely well albeit I need to take my mast position forward about 1.5cm.

Select to expand quote

Tony Wills said..
First ride on the GT-R with the Severne HG4 8.0 today. Was super light with a mate and myself basically chasing gusts.

The 8.0 and the GTR went extremely well albeit I need to take my mast position forward about 1.5cm.

Great to hear. I find with my Hydras I move the sail mast foot forward about 1 cm for every 1.0 meter upsize in sail.

How to you find the rotation on the HG4 8.0?? I am considering those as well.

Select to expand quote

Tony Wills said..
First ride on the GT-R with the Severne HG4 8.0 today. Was super light with a mate and myself basically chasing gusts.

The 8.0 and the GTR went extremely well albeit I need to take my mast position forward about 1.5cm.

pictures or it didn't happen

Tried the GTR+ with old SB 177, HGO 9.5, and -1.5 shim today just as an experiment, in NNW patches on the lake, and wanted more beam reaching in case the wind died - a few decent runs, it works fine, just with a bit more sensitive trimming than 115 fuselage as you would expect

Select to expand quote

seanhogan said..

Tony Wills said..
First ride on the GT-R with the Severne HG4 8.0 today. Was super light with a mate and myself basically chasing gusts.

The 8.0 and the GTR went extremely well albeit I need to take my mast position forward about 1.5cm.

pictures or it didn't happen

Sean, it may as well not have happened as the conditions were really (really) light. I do however have some shots of my new toys!

tswei99, I am using the old 75% Severne mast that has a slightly larger diameter than the current Apex and Arcs. Whilst it does rotate, it needs a decent pull and shock to make the cams rotate. I have since ordered one of the new type 490 masts which should make life even sweeter than it already is.

Oh, and I've also ordered the HG4 in the 7.0 as well

Select to expand quote

Tony Wills said..

seanhogan said..

Tony Wills said..
First ride on the GT-R with the Severne HG4 8.0 today. Was super light with a mate and myself basically chasing gusts.

The 8.0 and the GTR went extremely well albeit I need to take my mast position forward about 1.5cm.

pictures or it didn't happen

Sean, it may as well not have happened as the conditions were really (really) light. I do however have some shots of my new toys!

tswei99, I am using the old 75% Severne mast that has a slightly larger diameter than the current Apex and Arcs. Whilst it does rotate, it needs a decent pull and shock to make the cams rotate. I have since ordered one of the new type 490 masts which should make life even sweeter than it already is.

Oh, and I've also ordered the HG4 in the 7.0 as well

Oh man!! That sail looks sweet. I am very envious. We have light wind season coming up (lots of 8-15 knot days). Great to hear that you are getting so much versatility out of the GTR. I actually think its the 800 wing that is so great, I have the GTR configuration and I also set it up with the 105+ fuse and 255 tail which makes it even rangier. Bit harder to jibe the smaller tail, but overall more range. Gonna test it out with large sails soon.

What "8-15" days?
It's Aug. 9th and Tues well powered on 4.5 and 95 liter bump board.
That would mean 3.0 windfoil.

Beauty Anthony ! that sail looks sweet !!!

Any intention of going full carbon on the foil ? definitely should !

Select to expand quote

seanhogan said..
Beauty Anthony ! that sail looks sweet !!!

Any intention of going full carbon on the foil ? definitely should !

I would second that thought. I sprung for the IQ mast this year and sooooo glad I did. Really, really stable, just makes everything easier to control and higher performance.

I think that HG Race sail is begging you for a carbon mast

You guys are terrible

come on ! it's not like if you were going overseas anytime soon !!

So after a couple of sessions on the GTR, I'm finding it quite difficult to prevent the foil from continuing to gain height without some serious forward hip movement. The mast base is probably 75% forward in the track and I have my foot straps in their most forward holes. Used it today in 12-20 gusty NW breeze with the HG4 7.0 and for most of the flights my rear foot was sitting forward of the rear strap.



My next step is to take the mast all the way forward and after that, insert a rubber shim to increase the stabiliser's angle of attack in order to maintain stability at speed and to prevent the foil from wanting to gain too much height.

For those who have some decent experience on the GTR, I would appreciate their advice.

Hey Tony - try a shim to DECREASE AofA of stabiliser, not increase it (that will force tail down/nose up), I find each 0.5 increment on SB shim set makes noticeable difference so keep it subtle and experiment

Also angle of foil mast in box may need change in rake as you have mismatch of brands ... others will know more than me on that one but maybe mast needs to sit more angled toward nose (which decreases AofA of wings when board is flat)

Hi Pete, I actually decreased the Angle of Attack (AoA) for my session on Wednesday. I had a small rubber o'ring between the stab and the fuselage (underneath) the most aft screw. Not sure of what angle it gave but the lift from the foil was unmanageable. Removed this o'ring for today's session and it was better but not perfect. My understanding is (like an aircraft), an increase in AoA for the stabiliser will lower the pitch of the aircraft (foil). This of course only occurs once the foil is at speed. An aircraft will initially have high rear stab AoA when taxiing for takeoff but will quickly feather that out. Acknowledge the angle of the mast so will possibly shim this with some rubber o'rings in due course.

Thanks for the words of wisdom mate. Hoping we can catch up soon and have a sail together.

Regardless, enjoying this first world problem

Select to expand quote

Tony Wills said..
Hi Pete, I actually decreased the Angle of Attack (AoA) for my session on Wednesday. I had a small rubber o'ring between the stab and the fuselage (underneath) the most aft screw. Not sure of what angle it gave but the lift from the foil was unmanageable. Removed this o'ring for today's session and it was better but not perfect. My understanding is (like an aircraft), an increase in AoA for the stabiliser will lower the pitch of the aircraft (foil). This of course only occurs once the foil is at speed. An aircraft will initially have high rear stab AoA when taxiing for takeoff but will quickly feather that out. Acknowledge the angle of the mast so will possibly shim this with some rubber o'rings in due course.

Thanks for the words of wisdom mate. Hoping we can catch up soon and have a sail together.

Regardless, enjoying this first world problem

To DECREASE the AOA the shim needs to be underneath the MIDDLE screw.
But beware of the thickness of the shim : 1 mm max should suffice .
Otherwise you risk cracking the body of the stab by the induced tension.

Still better to get a + fuselage with the shims combined with a 255 -2 stab .

Don't be afraid of the stab.
I see a lot of new foilers unused to the power of the foil and are in a hurry to reduce the rear stab angle, thinking of it as a power switch. what often happens is reducing the stab angle reduces the pitch stability and then you end up on a see saw. Remember it is called a stab for a reason ( stability)
We all have been at the stage thinking we are fully committing and cannot possibly hold the foil down. With TOW you realise how much more you can hold. ( even on speed runs my rear stab has plus 1 shim :)

Lol, that sounds like me for sure. Last outing on my GTR + was my 3rd and I could hold the front down just but would really have to hang my wait forward hard off the boom and my front foot to do so. My straps are full forward, mast base 2/3 forward and -1.0 shim. Felt on the edge, but the extra speed was fun. I was thinking next outing I'd go even further forward with mast base and -1.5 shim.

Select to expand quote

Peter Hands said..
Hey Tony - try a shim to DECREASE AofA of stabiliser, not increase it (that will force tail down/nose up), I find each 0.5 increment on SB shim set makes noticeable difference so keep it subtle and experiment

Also angle of foil mast in box may need change in rake as you have mismatch of brands ... others will know more than me on that one but maybe mast needs to sit more angled toward nose (which decreases AofA of wings when board is flat)

Second that. I had both the 2020 and the 2021 GTR+ setups. The new Plus fuselages with the shims are really really nice. The negative shims create stability, and lots of range. I found the -1.5 to be perfect for all around riding in 15-25 knots. I did try -0.5 on a lighter day and while it lifted early it also was much easier to breach. I am 90 KG and ride 5.0-6.0 typically.

The 95+ fuse is avail as an upgrade. Comes with shims from +1.0 to -2.0.

Third that. I use Moses with shims. I always shim to decrease the down angle of the stab. This lets me control the lift with my feet. I control it rather than it controls me. This also keeps the lift more constant with changing speed.

Don't overdo this, however. You do want the stab to do its job of stabilizing the angle of attack of the front wing. If you shim it too much to reduce the down angle, the stab is flying along without doing any work. This does not work.