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?
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