What Kind of Sail Is Shown Toward the End of this Clip ?

[avb3]

Being a bit of a rookie, this is not what I envision a genoa to look like The sail starts at about 3:20

Youtube clip

[skipmac]

I'ts a twin jib rig designed for downwind sailing. Called a twizzle rig by some.

[avb3]

Seems complicated compared to a genoa. What is the advantage?

[zeehag]

two jibs-2 headstays-twins-- used for down wind sailing is easier than main -- main overshadows jib. with twin jibs, no need for main to overshadow the jib,as no main is in use. the 2 jibs take the wind and the boat downwind.

[avb3]

OK.. I get that the double-jib use not being shadowed by the main, but I wonder if it actually is more efficient than main and genoa?

If this is more efficient, why is there not a more prevalent setup?

[Adelie]

Originally Posted by avb3

OK.. I get that the double-jib use not being shadowed by the main, but I wonder if it actually is more efficient than main and genoa?

If this is more efficient, why is there not a more prevalent setup?

Advantages are:
1 the center of effort is so far forward that the boat may self-steer, if not, very easy to set up sheet to tiller self steering.
2 Depending on exactly which two headsails used, sail area may be greater than main & Genoa.
3 Much easier to set, use and douse than a spinnaker.
4 Not as susceptible to accidental gybes as a main
5 cheaper, probably, than an asymetrical spinnaker.

Reasons it may not be widely used:
1 Lack of publicity compared to spinnakers or asymetricals
2 two poles required, though sheeting for the second headsail can be to main boom end.
3 probably not as fast as using a spinnaker

The twizzle rig mentioned by an earlier poster is a specific form of the twin headsail rig with the poles attached to a vertically strung line in front of the mast.

[KillerBoo]

What´s the gain compared to an ordinary spinnaker?

EDIT: Answered while I typed

[skipmac]

Originally Posted by avb3

OK.. I get that the double-jib use not being shadowed by the main, but I wonder if it actually is more efficient than main and genoa?

If this is more efficient, why is there not a more prevalent setup?

Well it is more efficient only if you are doing a lot of downwind sailing which you can do pretty well with other sails that are more multifunction. So an extra sail to carry that is extra expense and extra stowage space on the boat. Like everything on a boat you have to decide if the benefits vs cost and space are justified for you, your boat and your sailing.

[Designguru]

It's probably safer than a spinnaker and mainsail for a short handed crew. Spinnaker sailing does take more helming expertise than other headsails and can be quite exhausting although great fun. The main boom usually has to be secured with a "preventer" to avoid the potential of an involuntary gibe when the boom can sweep across the boat with the danger of injury to crew. That happens when the wind gets around the back of the main hence the need for a good helmsman. I've not heard of a spinaker being used withan autopilot. I for one wouldn't risk it.

[Adelie]

Originally Posted by skipmac

Well it is more efficient only if you are doing a lot of downwind sailing which you can do pretty well with other sails that are more multifunction. So an extra sail to carry that is extra expense and extra stowage space on the boat. Like everything on a boat you have to decide if the benefits vs cost and space are justified for you, your boat and your sailing.

I don't see that there is necessarily any added expense or stowage.

If you wanted to set up this rig cheap you could use a genoa and a lapper, poling the lapper to the windward side and sheeting the genoa to the end of the main boom on the leeward.

Better would be a lapper/Genoa and a drifter. But not everyone carries a drifter.

Both sails shown in the video are nylon so that does appear to be an extra sail, either a second drifter set with a first, or a special built nylon double sail set on a roller furler. I'll have to watch that again.

The video boat also has 2 poles, which would be an added expense if you didn't want the second pole just anyway. If you are using a spinnaker I can see wanting the second pole for double pole gybes, or even double pole sailing. When I raced on a Cal40 we took a second pole for overnight races where we would be out longer than the forecast. In heavy air we always double pole gybed the spinnaker, much safer.