View Full Version : Which sail with 8.5 and Ultrasonic ?
19th August 2011, 08:18 PM
I have no experience with very big sail and i want a new sail with my Ultrasonic
Actually my biggest sail is Overdrive 8.5.
So I don't know what to choose between an Overdrive 9.7m or an Overdrive 11m !
9.7 may be too small
11m maybe too big
Help, I am lost !
Thank you for any advices .
My weight is 79kg.
19th August 2011, 10:13 PM
Get the Ultrasonic...... put your 8.5 Overdrive on it (rigged full).
THEN decide if you want/need a bigger sail.
I've sailed the US 147 with 9.1 Sailworks NX fw and 8.5 Sailworks NX 4 and found that I can
get fully on plane in < 10 knots. I weigh 77 KG.
Can't stay on plane in lulls < 8 knots with the 8.5 m2 NX4, but can on the 9.1m2.
You may find you don't need > 9.5- 10.0 m2.
It is hard to find sails with good low end in > 9.5 m2 as most sails that big are designed for high wind
The Overdrive is better as it's more Jr/Youth medium wind oriented.
20th August 2011, 04:07 AM
I suppose you see already the Video of Steve Alen on the UltraSonic 147 with 9.7 Overdrive, can beat easy a Formula with 11 on reach in very light winds and get better and better when the wind pick up. For a 80 kgs rider is the best combination from 7 to 15 knots after with your 8.5 you can use it until 20/25 knots depend of your skill.
All the best
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