The new V2 mast by Gofoil is out now. Still the same solid AF high modulus pre preg carbon as day 1, same mast, fuse, plate one piece and only 2 screws for the wings. BUT Alex has shifted the fuselage forward on the mast join. Iv found this gives greater lift allowing you to ride smaller foils than before, on the pump projects you forward, it's faster as the mast profile has changed. The chord is 140mm and 14mm thick. Available in 70,75,80,90,100cm
Here's a good simple clip to explain.
I've been riding a new 80cm V2 mast for a few weeks now.
Winging and downwind sup foil only so far.
Hoping to test on the kitefoil and windfoil in coming weeks.
Initial Thoughts and Feels are..
Faster Winging, around 4km/h peak speed increased according to Garmin.
This is around a 10% speed gain average from V1.5.
Based on my PB speeds using stock RS1000 and FTL14.5.
For SUP Downwind it pumps easier than my previous GoFoil mast and feels more efficient through the water.
More testing in waves is needed, but overall I only feel positives from the upgrade from the previous great mast. The Stiffness and quality is ideal for me at 85kg and I use this one setup for all foil disciplines.
Masts now come with a fuse sock and better quality covers.
80cm V2 mast and fuse = 2.88kg
Full Foil setup (1000/17FTS) = 3.80kg
Fuse length overall = 600mm end to end
Fuse length = 380mm socket to socket
Fuse length in front of mast = 93mm
Fuse length behind mast = 147mm
Mast chord = 140mm
Mast length is top of base plate to underside of fuse = 800mm
RS1000 setup (my current GoTo wing setup)
Fixed tail short = 675mm overall fuse length
Fixed tail long = 765mm overall fuse length
Measured front of wing to back of tail
Any more impressions on the new mast for aggressive prone surf and the stiffness of the fuse for heavy weight riders?
it seems like the mast back might stabalize
things too much for me, I like being mast forward and loose. Also the mast back setup puts more pressure on the fuse so I have some stiffness concerns.
thanks!
Select to expand quoteTooMuchEpoxy said..
Any more impressions on the new mast for aggressive prone surf and the stiffness of the fuse for heavy weight riders?
it seems like the mast back might stabalize
things too much for me, I like being mast forward and loose. Also the mast back setup puts more pressure on the fuse so I have some stiffness concerns.
thanks!
You will not like it as you don't like anything 
I have both 1.5 and 2 in 80cm I am 105kg. The 2 is a good improvement in most areas as Baldy says above plus I feel it turns better as well. I notice it when I go back on the 1.5. Looking to upgrade the 1.5 to a 2 as soon as I can.
Select to expand quotehilly said..TooMuchEpoxy said..
Any more impressions on the new mast for aggressive prone surf and the stiffness of the fuse for heavy weight riders?
it seems like the mast back might stabalize
things too much for me, I like being mast forward and loose. Also the mast back setup puts more pressure on the fuse so I have some stiffness concerns.
thanks!
You will not like it as you don't like anything
I have both 1.5 and 2 in 80cm I am 105kg. The 2 is a good improvement in most areas as Baldy says above plus I feel it turns better as well. I notice it when I go back on the 1.5. Looking to upgrade the 1.5 to a 2 as soon as I can.
I just really like my mast position. It's the starting point for my tune - I start with that forward pivot and shim to get it riding where I want. Can't see myself moving it back 2 in in the boxes which I'm thinking would mean shimming the tail significantly for less lift more glide.
I love my 1210 custom cedrus setup now! Just want something for bigger days prone so I need gofoil to get that skinny mast efficiency to make the small wings pumpable with the system stiffness I require. - but yes, I'm highly critical of gear and if something doesn't work for me you'll hear about it!
I am a light guy so I was keeping quiet but here is my experience as no one seems to have too much technical to say.
The v2 definitely has much better pump and the turning felt more powerful but very hard to explain maybe even more surfy which is weird. The mast profile felt very silky and noticeably smoother and faster through the water. Very nice feeling.
Because I am light I am already over foiled on the rs850 and the v2 mast seemed to make me more overfoiled but a little less after going to a smaller tail in the 10.5 tail.
My conclusion is that the mast going further back on the fuselage might be very good for heavier guys allowing to size down a wing and get the better pump but interestingly it seemed to allow for less tail. It also made me realise that against my belief longer fuselage with smaller wingspan tails might be much better than going shorter all the time. So yes you will likely run a smaller tail but I don't agree with shimming the lift out so much as rather chop the tail as a better option if too draggy.
My son was 93kg riding the v2 mast as a gofoil team rider and said he would never go back to the v1.5. He loves it. He rides 850 mostly and some times 1000. Dedicated proner and a pretty good one.
I agree with hilly though, you need to try it as knowing you I would not want to be the one who convinced you. ;-) You should be on the 850 as it is a lift 120 just much better according to some who have both but you won't have a bar of it.
I didn't agree when I first saw what Alex did with the v2 but it may make a lot of sense for bigger guys to have an efficient tune and still have a little front foot pressure for control. The v2 didn't suit my needs as at my weight I need an rs700 like the 850 just smaller and the v2 just made the 850 stronger. I do love the 850 but it is mostly too powerful for my weight in our waves. 65kg.
You need to try it as it is very controversial design change among some technicians but I also would love to know your feed back after you tune it as I do agree with a lot of your experiences and I think it could work great. You will either love it or hate it. :-)
hope all this **** helps somehow
Select to expand quoteTooMuchEpoxy said..hilly said..TooMuchEpoxy said..
Any more impressions on the new mast for aggressive prone surf and the stiffness of the fuse for heavy weight riders?
it seems like the mast back might stabalize
things too much for me, I like being mast forward and loose. Also the mast back setup puts more pressure on the fuse so I have some stiffness concerns.
thanks!
You will not like it as you don't like anything
I have both 1.5 and 2 in 80cm I am 105kg. The 2 is a good improvement in most areas as Baldy says above plus I feel it turns better as well. I notice it when I go back on the 1.5. Looking to upgrade the 1.5 to a 2 as soon as I can.
I just really like my mast position. It's the starting point for my tune - I start with that forward pivot and shim to get it riding where I want. Can't see myself moving it back 2 in in the boxes which I'm thinking would mean shimming the tail significantly for less lift more glide.
I love my 1210 custom cedrus setup now! Just want something for bigger days prone so I need gofoil to get that skinny mast efficiency to make the small wings pumpable with the system stiffness I require. - but yes, I'm highly critical of gear and if something doesn't work for me you'll hear about it!
I don't recall stiffness was ever an issue with GoFoil's masts, never had an issue myself. I'm on the heavier side as
well at 90+ and riding GF setups both on Cedrus (custom alu fuse) and on V2 mast since it was available.
V1.5 was noticeably draggy, even compared with the Cedrus, that's the reason I was riding GF with Cedrus.
The V2 is a worthy upgrade. I was riding RS 1150, 1075 and 850 and the switch to the V2 was flawless.
Can't tell you if it's going to fit your style or preference but if you have any stiffness or drag issues it would be the
first time I hear about it. That said, Cedrus V2 is just around the corner. skinny and stiff is the mission behind it...
I've got a chance to demo the new mast and a foil or two. At 88kg using the 80cm for prone in slow waist to chest and wing 4m with chop; or supfoil and wing 6m with a priority on pumping/carving and riding swells over outright speed, which two foils and tails should I ask for? RS 850/1150? Should I try the GT 1400?
Really appeciate the advice (in advance!)
Well shoot, this thread and my question sure tanked... I only got to use it winging, but I see no reason this mast geometry won't work perfectly for me prone also.
Looks like there is another thread about the foils (RS) so I won't go on other than to say the new mast is really good. With an RS 1150 pumping is fun! Long climbs, and plenty of glide. I also tried the RS 1075 (my new favorite wing foil) What I found (and unexpectedly since I was always under the impression GF masts were stiff) is that the mast (80cm) is pretty flexy. So is the foil. I actually like flex when done properly (and it is), and combined with the more rearward mast position, I felt like turns were more carvy and the feel of the foils is such that you get a lot of input when carving and pumping, but also great straight line stability and speed if you keep the foil level. The mast is very slippery (fast) and it's super easy to get on foil due to the angle of attack with a flat rockered board. Also, the hardware, and fit and finish are flawless, as is the fuse to foil connections. It's really a good foil system. I'm sold!
Select to expand quoteHwy1North said..
Well shoot, this thread and my question sure tanked... I only got to use it winging, but I see no reason this mast geometry won't work perfectly for me prone also.
Looks like there is another thread about the foils (RS) so I won't go on other than to say the new mast is really good. With an RS 1150 pumping is fun! Long climbs, and plenty of glide. I also tried the RS 1075 (my new favorite wing foil) What I found (and unexpectedly since I was always under the impression GF masts were stiff) is that the mast (80cm) is pretty flexy. So is the foil. I actually like flex when done properly (and it is), and combined with the more rearward mast position, I felt like turns were more carvy and the feel of the foils is such that you get a lot of input when carving and pumping, but also great straight line stability and speed if you keep the foil level. The mast is very slippery (fast) and it's super easy to get on foil due to the angle of attack with a flat rockered board. Also, the hardware, and fit and finish are flawless, as is the fuse to foil connections. It's really a good foil system. I'm sold!
Based on your previous post, I would have suggested trying the GT-1250 and GT-1400.
Thanks DWF. I watched your video and agree that mid aspect has it's place. No doubt that adapting riding style to an HA foil often means loosing some of the forgiveness and fun for moderate gains in pumping and glide. With the mast further back, I think pitch sensitivity is reduced a bit. Hopefully I'll get a demo on the 1250 and 850HA for comparision sake.
Just ordered a new 80cm v2. Going to do some precise measurement including angles against a late 2022 1.5 a buddy has as well as some back to back testing.
Same angles, just fuse set back 50mm far as I can tell.
I think the reason most people find the 50mm setback is equal to a new balance point about 35mm back in the tracks compared to V1.5 is due to the fact that the mast has less drag so slightly less pitching moment in the system.
Select to expand quoteJu_foil said..
Same angles, just fuse set back 50mm far as I can tell.
I think the reason most people find the 50mm setback is equal to a new balance point about 35mm back in the tracks compared to V1.5 is due to the fact that the mast has less drag so slightly less pitching moment in the system.
Ju_foil, any theories on why the V2 may have lower drag than previous versions? Any difference in chord length or thickness?
There's a very long thread going on about mast drag over here, To my mind, all completely inconclusive but very interesting;
forum.progressionproject.com/t/opinions-no-limitz-v2-especially-vs-new-f-one-hm-14-mast/2886/45
The Go Foil mast (V1.5), has a massive chord length, 135mm compared to most on the market. It's pretty svelte though at 14.5mm thickness. Just changing the profile shape from what it was to what it is now would have minimal impact on drag.
The V2 mast has a wider chord. Around 138-139mm. The profile is more of a race shape. Thickest point at around 40%. I think the v1.5 mast was more 50/50. Based on my feels on the water the new mast it is faster and less drag.
Select to expand quotebaldy123 said..
The V2 mast has a wider chord. Around 138-139mm. The profile is more of a race shape. Thickest point at around 40%. I think the v1.5 mast was more 50/50. Based on my feels on the water the new mast it is faster and less drag.
In the Prog. forum thread I linked above, wetted surface area (chord length) was determined to be the biggest factor affecting drag (arguably). Even the experts can't seem to agree on which numbers to plug into the equation.
Just now looking at a V1.5 mast, the leading edge is extremely wide and blunt. I'd call it 3mm of semi rounded blunt area. Safer but the most blunt LE of any of the masts I have. You could shave with the LE of a Mikes Lab mast. Seems like that might play a role.
One nice trick with the v2 mast is it doesn't collect weeds. It also doesn't pee water off the back and make noise. It must be slippery.
Select to expand quoteThatspec said..baldy123 said..
The V2 mast has a wider chord. Around 138-139mm. The profile is more of a race shape. Thickest point at around 40%. I think the v1.5 mast was more 50/50. Based on my feels on the water the new mast it is faster and less drag.
In the Prog. forum thread I linked above, wetted surface area (chord length) was determined to be the biggest factor affecting drag (arguably). Even the experts can't seem to agree on which numbers to plug into the equation.
Just now looking at a V1.5 mast, the leading edge is extremely wide and blunt. I'd call it 3mm of semi rounded blunt area. Safer but the most blunt LE of any of the masts I have. You could shave with the LE of a Mikes Lab mast. Seems like that might play a role.
Yeah, from what I can gather playing around with foil sim shortening chord is the best way to reduce drag.provided you can't make the mast any thinner. But it looks like thinner wins. The difference between 10% t/c and 15$ is almost equivalent to doubling chord. How to make a mast thinner and also stiff enough? Carbon all the way through - so heavier..and here we are.
On my calcs, it depends on speed. Using 18mm thick and 150 mm chord as the starting point. At low speeds (10knots) reducing the chord by 25% (to 120mm) or reducing the thickness by 25% ( to14.4 mm) results in similar small drag decrease by both. But at higher speeds 20-30 knots I get that the drag reduction for the reduced chord is almost twice that of the reduced thickness... Depends on the section used as well though, I didn't optimise the selected airfoil, just used the NACA00xx series.
Should add, this assumes fairly turbulent water at Ncrit=2
As an average foiler riding at 25 to 30 kph I do not notice a huge reduction in drag compared to the V1.5. I do notice more lift and better turning and it feels smoother. It is a refinement rather than a game changer. Saying that I will upgrade my second mast to a V2 as changing between the 2 is noticeable. I use one for sup and one for wing set up on 2 different boards.
Select to expand quotePrfctChaos said..
On my calcs, it depends on speed. Using 18mm thick and 150 mm chord as the starting point. At low speeds (10knots) reducing the chord by 25% (to 120mm) or reducing the thickness by 25% ( to14.4 mm) results in similar small drag decrease by both. But at higher speeds 20-30 knots I get that the drag reduction for the reduced chord is almost twice that of the reduced thickness... Depends on the section used as well though, I didn't optimise the selected airfoil, just used the NACA00xx series.
Should add, this assumes fairly turbulent water at Ncrit=2
How do these calculator deal with different surfaces textures?
Gloss vs various grades of wet sanded surfaces? Then there is the sharpness of the leading edge... AND like mentioned above the various speeds .
You read about experts who say cord has X value and thickness only has Y much impact. Just seems like these two relationships would vary greatly, depending on all those other factors.
Select to expand quoteFishdude said..PrfctChaos said..
On my calcs, it depends on speed. Using 18mm thick and 150 mm chord as the starting point. At low speeds (10knots) reducing the chord by 25% (to 120mm) or reducing the thickness by 25% ( to14.4 mm) results in similar small drag decrease by both. But at higher speeds 20-30 knots I get that the drag reduction for the reduced chord is almost twice that of the reduced thickness... Depends on the section used as well though, I didn't optimise the selected airfoil, just used the NACA00xx series.
Should add, this assumes fairly turbulent water at Ncrit=2
How do these calculator deal with different surfaces textures?
Gloss vs various grades of wet sanded surfaces? Then there is the sharpness of the leading edge... AND like mentioned above the various speeds .
You read about experts who say cord has X value and thickness only has Y much impact. Just seems like these two relationships would vary greatly, depending on all those other factors.
CFD accounts for the form (fluid passing through a defined 3D mesh resolving pressure and velocity) and typically approximates viscous drag (skin friction) based on surface roughness.
I've been spending some time on the v2 mast and the v1.5 mast back to back. 95kg, prone, riding the 850 and 10.5 FTL on 80cm masts.
I find the v2 mast glides *slightly* better. Barely noticeable prone but there's something there.
the 1.5 is more stable on pop-up and pumping and I'm able to more consistently put in power pumping and in turns. I think the v2 fuse is flexing more, increasing the angle of attack of the front wing in more loaded scenarios - turns, pumping, etc. I'm finding I need to ride it more than 2" back. Probably closer to 2.5 To account for the extra AOA on pop up, etc. this results in more back foot pressure than I want in the less critical moments.
if anyone in the US wants a screaming deal on the v2 or any other part of the setup let me know, I'm eager to rid myself of it.
That's intereesting you say that TooMuchEpoxy, I've replaced both my V1.5's for the V2 & use it for all foil disciplines from prone, tow, downwind, sup, ding & tow & I love the lift & pump from it...I do agree I move it further back then I ever did with the V1.5 if I use the same front wing that I would have used on the V1.5 or otherwise I leave it in the same place & go a smaller front wing... I a super gusty ding on it yesterday & didn't feel any flex through turns...
Select to expand quoteTooMuchEpoxy said..
I've been spending some time on the v2 mast and the v1.5 mast back to back. 95kg, prone, riding the 850 and 10.5 FTL on 80cm masts.
I find the v2 mast glides *slightly* better. Barely noticeable prone but there's something there.
the 1.5 is more stable on pop-up and pumping and I'm able to more consistently put in power pumping and in turns. I think the v2 fuse is flexing more, increasing the angle of attack of the front wing in more loaded scenarios - turns, pumping, etc. I'm finding I need to ride it more than 2" back. Probably closer to 2.5 To account for the extra AOA on pop up, etc. this results in more back foot pressure than I want in the less critical moments.
if anyone in the US wants a screaming deal on the v2 or any other part of the setup let me know, I'm eager to rid myself of it.
Because the wing is further from the mast on the v2 it creates a greater turning moment around the mast that results in more front foot pressure. Now the turning moment will increase slightly more dramatically with speed on the v2 than a mast with the wing closer to the mast. It's not flex I don't think as the forces in the angle of attack plane are the best supported for flex. This feel is desirable for most as power increases with speed.
Trying to setup any gofoil let alone the v2 with back foot pressure is self defeating in any power or speed circumstances. Maybe the gutless circumstances you ride in have allowed an extreme setup that is no longer tolerant of much.
I prefer the V2 for ding but not so much sup in waves. Lift when dropping in was harder to control than V1.5.
Select to expand quoteAnyBoard said..TooMuchEpoxy said..
I've been spending some time on the v2 mast and the v1.5 mast back to back. 95kg, prone, riding the 850 and 10.5 FTL on 80cm masts.
I find the v2 mast glides *slightly* better. Barely noticeable prone but there's something there.
the 1.5 is more stable on pop-up and pumping and I'm able to more consistently put in power pumping and in turns. I think the v2 fuse is flexing more, increasing the angle of attack of the front wing in more loaded scenarios - turns, pumping, etc. I'm finding I need to ride it more than 2" back. Probably closer to 2.5 To account for the extra AOA on pop up, etc. this results in more back foot pressure than I want in the less critical moments.
if anyone in the US wants a screaming deal on the v2 or any other part of the setup let me know, I'm eager to rid myself of it.
Because the wing is further from the mast on the v2 it creates a greater turning moment around the mast that results in more front foot pressure. Now the turning moment will increase slightly more dramatically with speed on the v2 than a mast with the wing closer to the mast. It's not flex I don't think as the forces in the angle of attack plane are the best supported for flex. This feel is desirable for most as power increases with speed.
Trying to setup any gofoil let alone the v2 with back foot pressure is self defeating in any power or speed circumstances. Maybe the gutless circumstances you ride in have allowed an extreme setup that is no longer tolerant of much.
I'm not trying for back foot, I'm trying to get rid of it! My point is I'm getting so much extra lift on takeoff(from the fuse flex I think) I have to move the mast back too far resulting in back foot pressure when cruising. I'm riding with it as far forward as I can without blowing up my pop up. Honestly I'm almost 100% sure it's fuse flex. That v2 mast geometry is putting at least 2x force on that part.
I'm sure it's better on wing - I can absolutely tell Aguera designed this based on his personal riding objectives on wing without significant prone input.
Select to expand quoteTooMuchEpoxy said..
I'm not trying for back foot, I'm trying to get rid of it! My point is I'm getting so much extra lift on takeoff(from the fuse flex I think) I have to move the mast back too far resulting in back foot pressure when cruising. I'm riding with it as far forward as I can without blowing up my pop up. Honestly I'm almost 100% sure it's fuse flex. That v2 mast geometry is putting at least 2x force on that part.
I'm sure it's better on wing - I can absolutely tell Aguera designed this based on his personal riding objectives on wing without significant prone input.
I think its the 850 that's flexing and you feel it more on the v2? First time I rode it I thought my bolts were loose... I'm used to flexy stuff so no big deal, and it's not tracking wierd or anything. Maybe you are feeling the back foot due to the 10.5 being a bit small for you and you need more spasticity control!? The 850 has a lot of lift....
Select to expand quoteHwy1North said..TooMuchEpoxy said..
I'm not trying for back foot, I'm trying to get rid of it! My point is I'm getting so much extra lift on takeoff(from the fuse flex I think) I have to move the mast back too far resulting in back foot pressure when cruising. I'm riding with it as far forward as I can without blowing up my pop up. Honestly I'm almost 100% sure it's fuse flex. That v2 mast geometry is putting at least 2x force on that part.
I'm sure it's better on wing - I can absolutely tell Aguera designed this based on his personal riding objectives on wing without significant prone input.
I think its the 850 that's flexing and you feel it more on the v2? First time I rode it I thought my bolts were loose... I'm used to flexy stuff so no big deal, and it's not tracking wierd or anything. Maybe you are feeling the back foot due to the 10.5 being a bit small for you and you need more spasticity control!? The 850 has a lot of lift....
The 1300 was a flexy foil. Felt weird compared to the 1075.
