Hi
I propose this topic as I've had some trifin boards which turn well, but I prefer the grip of the quads in choppy/on wave conditions. I know I should increase the size of the side fins to improve the grip of trifins, but if you do it, the fins must be asymmetric and have some toe in to continue being loose in the turns, and if you include some toe in you add some drag.
I've had some toe in fins but I'm not an expert. However I had two side 13 cm production fins in a trifin board which were asymmetric but no toe in. I haven't seen others like these. I think they were big but didn't need toe in to turn well. Of course trying the same board with 2? toe in fins turned better, but you get less planning performance.
I'd appreciate examples of trifin configurations with similar grip as quads and experiences of big side asymmetric fins with no toe in.
Tsch?ss
Check out Witchcraft, they don't make quad fin wave boards and some of their boards have 14.5cm sides, they also use twisted fins, slightly different to the K4 fins but same sort of concept.
Use the rail more? Here, a stock 17 cm center with 10 cm sides on a 77 L board that has rails that bite quite well.
Select to expand quoteTaavi said..
Use the rail more? Here, a stock 17 cm center with 10 cm sides on a 77 L board that has rails that bite quite well.
And for a comparison, the quad setup I am riding has a pretty similar hold and feel in the turns. Nearly 10 L bigger than the thruster above, 9 cm fronts and 14 cm rears, with a narrow chord and pretty small area, the MFC K300 series.
Select to expand quoteSideshore said..
I'd appreciate examples of trifin configurations with similar grip as quads and experiences of big side asymmetric fins with no toe in.
Assymetric fins without any toe-in are effectively toe-out. On the assymetric K4 fins this means that you need about 1 degree of toe-in in order for the fin to be "neutral" when sailing.
I like the AI fins from K4, 10-11cm in length and 1.5-2 degrees of toe-in.
Select to expand quoteSideshore said..
Hi
I propose this topic as I've had some trifin boards which turn well, but I prefer the grip of the quads in choppy/on wave conditions.
You can use bigger asym sidefins without toe, it is just gonna be more hit and miss in the turn entries and generally a more edgy feel. So if you're already into fine tuning the feel in turns, you just gonna have some decent toe in (and I in fact prefer a bit of cant too). With a flat inside asym fin, in total just above 3 degrees is the way to go. The toe in give a bit of a "slip" in the turn entry which delays the moment of grip generation a bit which allows you to set the turn and get in positions before the board kind of locks into the turn. This makes the whole sailing much more free, and you can develop your lines and react to the wave better. 13cm is pretty big for side fins but can work if the conditions are a bit slower. But then I would advice to go much smaller than you think with the rear fin. In particularly if you're not jumping. If you're gonna utilize the side fins for turning grip, you in fact want to kind of minimize the influence of the rear fin. You could for example take one of your quad rears and use as a center fin, ie something like a 14 or 15.
On my Goya Nitro with no toe-in in the boxes i used 13 cm K4 Ezzys with 2 dgree toe-in together with the stock 21 center MFC. Loose feeling and with a lot of grip in the turns and not feeling draggy. And much more spinout resistant than the stock 10cm MFC sidefins.
Select to expand quoteOla H said..Sideshore said..
Hi
I propose this topic as I've had some trifin boards which turn well, but I prefer the grip of the quads in choppy/on wave conditions.
You can use bigger asym sidefins without toe, it is just gonna be more hit and miss in the turn entries and generally a more edgy feel. So if you're already into fine tuning the feel in turns, you just gonna have some decent toe in (and I in fact prefer a bit of cant too). With a flat inside asym fin, in total just above 3 degrees is the way to go. The toe in give a bit of a "slip" in the turn entry which delays the moment of grip generation a bit which allows you to set the turn and get in positions before the board kind of locks into the turn. This makes the whole sailing much more free, and you can develop your lines and react to the wave better. 13cm is pretty big for side fins but can work if the conditions are a bit slower. But then I would advice to go much smaller than you think with the rear fin. In particularly if you're not jumping. If you're gonna utilize the side fins for turning grip, you in fact want to kind of minimize the influence of the rear fin. You could for example take one of your quad rears and use as a center fin, ie something like a 14 or 15.
I agree 100% with Ola in this... and when i can speak for myself and can add something i feel that quad has more pure grip in the top turn and a thruster set up (with small center fin) is more loose and pivoty in the top turn.
But this can depent from shape to shape end bottom shape...
Select to expand quoteOla H said..Sideshore said..
Hi
I propose this topic as I've had some trifin boards which turn well, but I prefer the grip of the quads in choppy/on wave conditions.
You can use bigger asym sidefins without toe, it is just gonna be more hit and miss in the turn entries and generally a more edgy feel. So if you're already into fine tuning the feel in turns, you just gonna have some decent toe in (and I in fact prefer a bit of cant too). With a flat inside asym fin, in total just above 3 degrees is the way to go. The toe in give a bit of a "slip" in the turn entry which delays the moment of grip generation a bit which allows you to set the turn and get in positions before the board kind of locks into the turn. This makes the whole sailing much more free, and you can develop your lines and react to the wave better. 13cm is pretty big for side fins but can work if the conditions are a bit slower. But then I would advice to go much smaller than you think with the rear fin. In particularly if you're not jumping. If you're gonna utilize the side fins for turning grip, you in fact want to kind of minimize the influence of the rear fin. You could for example take one of your quad rears and use as a center fin, ie something like a 14 or 15.
3 degrees total or 3 degrees per side?
I've used the K4 Ezzy in 1 and 2 degree. I'd like to try the AI in 2 or 3 to see if they are a bit more efficient for onshore.
Select to expand quoteGrantmac said..Ola H said..Sideshore said..
Hi
I propose this topic as I've had some trifin boards which turn well, but I prefer the grip of the quads in choppy/on wave conditions.
You can use bigger asym sidefins without toe, it is just gonna be more hit and miss in the turn entries and generally a more edgy feel. So if you're already into fine tuning the feel in turns, you just gonna have some decent toe in (and I in fact prefer a bit of cant too). With a flat inside asym fin, in total just above 3 degrees is the way to go. The toe in give a bit of a "slip" in the turn entry which delays the moment of grip generation a bit which allows you to set the turn and get in positions before the board kind of locks into the turn. This makes the whole sailing much more free, and you can develop your lines and react to the wave better. 13cm is pretty big for side fins but can work if the conditions are a bit slower. But then I would advice to go much smaller than you think with the rear fin. In particularly if you're not jumping. If you're gonna utilize the side fins for turning grip, you in fact want to kind of minimize the influence of the rear fin. You could for example take one of your quad rears and use as a center fin, ie something like a 14 or 15.
3 degrees total or 3 degrees per side?
I've used the K4 Ezzy in 1 and 2 degree. I'd like to try the AI in 2 or 3 to see if they are a bit more efficient for onshore.
3 degrees per side. The AI if I recall is something like a 80-20 profile while the Ezzy is basically a flat inside surf style fin. The AI likes a degree or so less toe in my experience. In fact,I prefer the Ezzy for my type of sailing.
Select to expand quoteOla H said..Grantmac said..Ola H said..Sideshore said..
Hi
I propose this topic as I've had some trifin boards which turn well, but I prefer the grip of the quads in choppy/on wave conditions.
You can use bigger asym sidefins without toe, it is just gonna be more hit and miss in the turn entries and generally a more edgy feel. So if you're already into fine tuning the feel in turns, you just gonna have some decent toe in (and I in fact prefer a bit of cant too). With a flat inside asym fin, in total just above 3 degrees is the way to go. The toe in give a bit of a "slip" in the turn entry which delays the moment of grip generation a bit which allows you to set the turn and get in positions before the board kind of locks into the turn. This makes the whole sailing much more free, and you can develop your lines and react to the wave better. 13cm is pretty big for side fins but can work if the conditions are a bit slower. But then I would advice to go much smaller than you think with the rear fin. In particularly if you're not jumping. If you're gonna utilize the side fins for turning grip, you in fact want to kind of minimize the influence of the rear fin. You could for example take one of your quad rears and use as a center fin, ie something like a 14 or 15.
3 degrees total or 3 degrees per side?
I've used the K4 Ezzy in 1 and 2 degree. I'd like to try the AI in 2 or 3 to see if they are a bit more efficient for onshore.
3 degrees per side. The AI if I recall is something like a 80-20 profile while the Ezzy is basically a flat inside surf style fin. The AI likes a degree or so less toe in my experience. In fact,I prefer the Ezzy for my type of sailing.
I believe my Quantum is ~0.75 degree per side when I calculated it. I quite like the Ezzy 2 degree 10cm on it both as a quad and tri.
I will likely try the AI as a 2 degree fin as well.
