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Newbie fin question?

Posted: Wed Aug 24, 2016 9:42 pm
by yabbadabba
Hello to all,

I have just purchased a Mega Intruder and not played with fins before.

As a starting guide is there any suggestions as to how many fins to use and what position?

Re: Newbie fin question?

Posted: Thu Aug 25, 2016 8:08 am
by Jim Tait
This page is a good starting point

http://www.surfkayakskills.com/fins.php

The exact process you use will depend on your approach to fiddling with things...... I know of people who spent a session adjusting the fin position time after time. Personally, I started off with them about 1/8 of the way back, then adjusted them between sessions - If it felt too loose I moved them back again.
And then you start wonderig about fin size, and if I should try smaller ones.........a whole new can of worms opened !!

Jim

Re: Newbie fin question?

Posted: Thu Aug 25, 2016 8:15 am
by yabbadabba
Ah thanks Jim, will have a read then go for a play when the surf allows :-)

Re: Newbie fin question?

Posted: Thu Aug 25, 2016 3:27 pm
by Daker
Just to add, you will likely find that to start off you want to use the standard (maybe 3.5 inch ?) fins that come with most boats as they provide a really solid grip and are unlikely to slip-out as you get used to the boat + waves.

Once you get a bit better and have experimented with moving them forward to loosen up the boat, it may then be worth experimenting with smaller fins which will definitely make the boat easier to turn and slip the tail. But, in clumsy hands, they are also more likely to lose grip on a bottom turn which can make life interesting if you are out in bigger conditions.

So, play around with then and just see what works best for you in the confidence v. control v. ease of turning stakes.

Re: Newbie fin question?

Posted: Tue Sep 06, 2016 8:27 pm
by Junior
I paddle the Fluid Element which uses a quad set up. Which fins should be symmetrical and which should be asymmetrical?

The Element fins I ordered from 4WFS are all asymmetrical?

Re: Newbie fin question?

Posted: Tue Sep 06, 2016 10:43 pm
by Daker
Generally the middle fin on a Tri setup is symmetrical, the others can be sym or aesymetrical.

On a quad having them all ae makes sense as they are closer to the rails and only generating lift in one direction (unlike the centre fin on a Tri that has to work all the time)

Re: Newbie fin question?

Posted: Wed Sep 07, 2016 7:56 am
by Junior
Sorry, I got that the wrong way round!

All the fins that came through were symmetrical

Re: Newbie fin question?

Posted: Wed Sep 07, 2016 10:39 am
by Just_Surf
On a quad the front fins should always be asymmetric, for the rear fins you should use asymmetric if you want more drive, symmetric if you are finding the boat hard to transfer from rail-to-rail.

Re: Newbie fin question?

Posted: Thu Sep 08, 2016 12:11 pm
by Junior
So how will my boat react if the quads are all symmetrical?

Re: Newbie fin question?

Posted: Thu Sep 08, 2016 6:49 pm
by Just_Surf
You'll have less drive through the turns, especially bottom turns, but it should flow really well from rail-to-rail. Of course, a lot depends on the design of the boat too, I've not surfed an Element, but that's a generalisation for any boat running quads; all asymmetric = loads of drive but a bit stickier going from rail-to-rail, all symmetric = fast transitions but less drive.

Re: Newbie fin question?

Posted: Thu Sep 08, 2016 7:40 pm
by Junior
Am I right in thinking 'drive' is the force that propels you out of the turn?

Re: Newbie fin question?

Posted: Fri Sep 09, 2016 8:03 pm
by Just_Surf
Kind of, it's an acceleration through the turn, that feeling of speeding up as you go through the turn, you accelerate towards the centre of the turning arc.