FX-ONE tuning help

On the outside it was blowing 15-30 and in about the 20 kt range I could smoke just about anything else on the water.

Thanks to all the people that called and emailed.

Basic trim sheet Nacra F17 #1

The information that we provide comes directly from our international Nacra team sailors.

Mast Rake:
Basic setting for now is the upper screw of the rudder spring on the
transom. To measure, you take the bridletankputting as a
reference with your trapeze-line.
You swing the trapeze line to the back and hold it against the
transom of the boat to see where it touches.

Rudder-rake/angle:
You turn the adjustable eye that is screwed into
the lower rudder casting 28 mm out. You measure
between the black rudder case to the center of
this adjustable eye.

Spreader-angle:
With 79 kgs on board, we recommend that you use 55 mm of spreader rake.
With 85 kgs on board, we recommend that you use 50 mm of spreader rake.
With 90 kgs on board, we recommend that you use 45 mm of spreader rake.
With 95+ kgs on board, we recommend that you use 40 mm of spreader rake.
Measure between the mast-track and diamond wires.(you place a sail batten from wire
to wire and measure the distance)If you weigh more or less you can
have more or less spreader-rake.

Diamond tension:
To measure the tension of the diamond wires we use a Loose & Co tension gauge which
you put onto the wire and let go. (The expensive one with the two wheels)
This one gives you the most accurate readings. The number that we work with on this
tension meter is:
34-38, until 15 knots
38-41, from 15 to 25 knots
41-43, from 25 plus

Mast Rotation:
Skipper sitting on the side> mast rotator pointing at middle of daggerboard case.
Skipper hiking almost on trapeze > mast rotator pointing at end of daggerboard case.
Skipper on trapeze > mast rotator pointing in the middle between rear beam and
daggerboard case.
Skipper on trapeze and full cunningham> mast rotator pointing at intersection of
rear beam and outside of the hull.

Daggerboards:
Upwind:
-Skipper sitting on the side> Boards totally down.
- Skipper hiking almost on trapeze > Boards totally down.
- Skipper on trapeze > Boards totally down.
- Skipper on trapeze and full cunningham > Raise the boards 30 cm up above the deck.

Downwind:
-Always raise the leeward board about 60 cm up above the deck and the weather board all the
way leaving 30mm below the hull.
-Mast rotation always fully opened/released and enjoy the ride!

Bob Curry
Team Nacra USA, F17

It took me a year to really get my FXone dialed in...

Fact or fiction, but I was told that is when the luff of the sail and the bend of the mast are a match that is the result you'll get.