What are the good makes of weed fins out there for speed and slalom.
Can you typically get away with a smaller fin if its weed given that the area of the foil is bigger?
What anglewill give you sufficent weed clearance?
What are the good makes of weed fins out there for speed and slalom.
MFC, JP (I use the freerides), Leading Edge (rare as rocking horse poo nowadays as no longer in production)
Choco are rumored to be making a speed weed, have seen the test ones (which look good) but as with everything to do with Choco "Jesus is delivering them"
Can you typically get away with a smaller fin if its weed given that the area of the foil is bigger?
Yes, however the lift generated by the fin is reduced, this allows you to be able to go quickish on larger weedies. I generally use a 23cm 45° weedy couldn't comprehend using that size pointer.
What angle will give you sufficient weed clearance?
Depends a hell of a lot on what you are sailing through.
One season we were going through Hardies run with pointers and being able to see our trails in the weed from earlier runs.
But then when we get the snot fields starting around spring time which gives 45º fins grief when going slowly.
30-45º would be a reasonable range.
Some personal observations on weed fins
The KA production speed fins have enough rake (30deg leading edge from memory) to shed light to moderate weed at speed. They are also exceptionally fast!
The smaller two sizes (20and 21.5cm) are starboard tack asymmetrical only. The 23cm version comes in assy. and symmetrical which is a very good all round weedy speed fin and about equal in area to a 26cm pointer.