Tuesday, April 30, 2013

Blowing 20+ Today so You Better Start Hiking.

We are still practicing.  Team Trials do not begin until Thursday.  The wind has been light the past few days but the story changes today.

The forecast calls for 20+ knots so no more placid lake sailing like the past few days.  Windfinder is calling for an average wind speed at 20 knots with gusts to 33 when they hit the water at 10 am this morning edging up to an average speed of 23 with gusts to 37 when they wrap up around 3.  My guess is they will shorten their time on the water so as not to fatigue themselves.  Hiking out in this kind of weather is strenuous.

What is hiking?  In sailing it doesn't involve a backpack and boots.  Wikipedia can explain it better than I can so here is an excerpt from wikipedia.com


In sailinghiking(stacking or stacking out in New Zealand) is the action of moving the crew's body weight as far to windward (upwind) as possible, in order to decrease the extent the boat heels (leans away from the wind). By moving the crew's weight to windward, the moment of that force around the boat's center of buoyancy is increased. This opposes the heeling moment of the wind pushing sideways against the boat's sails. It is usually done by leaning over the edge of the boat as it heels. Some boats are fitted with equipment such as hiking straps (or toe straps) and trapezes to make hiking more effective.
Hiking is most integral to catamaran and dinghy sailing, where the lightweight boat can be easily capsized by the wind unless the sailor counteracts the wind's pressure by hiking, or eases the sails to reduce it. The heavy keel on larger keelboats means that it is practically impossible to capsize them due to wind alone, but keelboat racers will still hike to prevent unnecessary heeling, or leaning sideways to leeward, because the more vertical in the water the keel is, the more effective it is at keeping the boat moving in a forward direction and preventing it from drifting to leeward, slowing the boat due to drag, and potentially increasing the distance the boat must sail when beating. Improper heel creates a tendency for the boat to turn off course, necessitating a correction with the rudder, which also increases drag. Sails use wind most efficiently when they are at a proper heel, another reason for controlling heel.

Boyd hiking out in an effort to keep the boat flat.


2 comments:

  1. 20-30kts Sounds like an exciting day of practice! How cold is it?

    ReplyDelete
  2. The wind forecast did not pan out. It was more like 12 with big puffs around 18. The air temp was close to 80 today. Warm again tomorrow but then cold for the actual trials. The pic of Boyd hiking was from last fall at RRYC.

    ReplyDelete