ILCA Sail Setup in Hiking Conditions

Once hiking conditions arrive, a balanced boat with appropriate rig setup becomes particularly important. The goal is to maximize hiking effort into productive speed.

The sail is set up for only about five degrees of weather helm and with a wide enough groove to accommodate steering for conditions, or to accommodate very gusty and shifty conditions.

Set weather helm for five degrees

The first objective, whether in flat water, waves, gusty, or steady wind, is to have just a small amount of weather helm. The rudder should do minimum work and should not create significant drag just to travel in a straight line.

As wind increases and more power is pushed into the sail, the center of effort is pushed aft. Sail draft moves aft of the underwater pivot point and wants to turn the boat upwind. That is weather helm. As wind gets stronger, this force gets worse unless action is taken. A boat with too much helm is unbalanced, requires a lot of rudder pull, creates excessive drag, makes hiking harder, and is tiring on the arms.

Aim for about five degrees of weather helm. The tiller is up just a bit from centerline to keep the boat moving straight, and it hardly requires effort. We do not eliminate it completely; if you let go of the tiller, the boat should still want to round up into the wind.

Waves and balance

In waves, it can be harder to get right. Even with good setup, every time you slam into a wave your apparent wind moves back. If you do not accommodate that, you feel added weather helm and steer up. Slam into a few in a row without steering down and you end up pinching even when the sail setup is good.

In waves, set up to balance yourself inside the steering groove. If you bear away and get wound up, and it is hard to drive down the wave backs, there is probably too much helm. Conversely, if the boat does not want to come back to your average desired angle after steering down, you may not have enough. You want to feel some loading that brings you back, but the helm should not feel mushy.

Flat water and steady wind

Since flat water and steady wind do not require as much absorption or tolerance in the rig, set up a little more critically. Use cunningham to keep the draft reasonably positioned, and vang as needed to reduce camber and rig loads while maintaining heel angle.

With a finer entry angle and flatter sail, angle of attack becomes more critical. The best tool for keeping up with changing angle of attack is often sheeting rather than steering, so be more active with the sheet when the sail is flatter. This is a fast, efficient, low-drag setup.

Waves or gusty/shifty conditions

Very shifty or gusty conditions, or the presence of waves, call for a more automatic and forgiving rig with a wider groove. You will steer more and need to maintain good flow over the sail through angle changes.

Cunningham is the primary tool. More cunningham promotes twist up top to keep power low where it belongs, reducing leverage on you, making hiking easier, and reducing weather helm as the draft moves forward. A tighter cunningham also increases entry angle as the draft moves forward, allowing attachment over a larger range of angle-of-attack changes made through steering or sheeting.

The outhaul reduces drag and flattens the leech exit. Keep the sail looking relatively even from top to bottom and apply outhaul alongside the other controls as necessary. The tighter the outhaul gets, the more critical the rig becomes, so be mindful before strapping it too tight.

Apply vang as necessary. As power increases, vang helps keep weather helm and rig loads under control through camber reduction and sheeting. Unfortunately, flattening narrows the entry and makes the rig less forgiving again, but it reduces rig loads and gives you the ability to sheet out effectively. Be more active with the sheet when using a lot of vang, because the flatter setup cannot maintain flow over as wide a steering range automatically.

Takeaway

With a balanced boat and an appropriate rig setup for the conditions, you can sail faster and more easily. Experiment with these shapes and notice the difference in feel and performance.