View Full Version : fin size Ultrasonic

28th August 2011, 04:51 PM
Could anyone recommend me the fin size for the ultrasonic with:

North s-type 9,5
North RAM 8,5
North S-type 7,8

I have a C3 sting 48 will this do for the S-type 7,8?
and the standard drake R13 58 for the 9,5 and the 8,5?

(my weight is 95kg and lenght 1,95m)

thnx in advance

mark h
28th August 2011, 07:34 PM
Some good reading here:



Do you find your S-Type 9.5m has a lot more power than your Ram F10 9m? I been thinking of getting a S-type 9.5m just for super light days:)

30th August 2011, 06:02 PM
Mark, thanks for your reply.

And yes there is much difference in lowend power. The Ram is more stable in the high-end and the S-type has a massive power in the low-end. You can see the difference when you rig the sails. The s-type has much more a belly. The RAM is more flat

I like both the sails very much. Easy rigging and both stable sails.

mark h
30th August 2011, 09:41 PM
Excellent news because I bought the S-type 9.5m this morning:) I love my Warp 9m/iS137, but at 100kg, it is best in 12k to 20k warm winds, lower winds feel slow and underpowered. Hopefully the S-Type 9.5m will solve this problem out. My Warp 10m is high wind Formula, so it is no more powerfull than my 9m Warp.