This is a very cool video and very informative, but one important note: to reduce roll, you should tighten the headsails flat. You will loose a small amount of sail area and speed, but the roll of the boat will be substantially reduced. Having "bagginess" in the headsails sets up a oscillation as the center of effort moves back and forth as the boat rolls. This causes a large roll to the vessel. Money spent in larger whisker poles is worth it for this reason. Or if you have to, furl slightly to allow the sails to flatten out. This has been our experience.
I'll add, to get the head sails flat you do need a pole down haul to remove any twist. Some poles, heavy ones particularly don't have downhauls rigged as standard.
No, actually it doesn't. The curve of the sails acts as a chute and, when the boat rolls, the air is forced down to counteract the roll, i.e. the downward force always opposes the roll. You can see it in action - here: ua-cam.com/video/sy53gIOrE40/v-deo.html
Seems a lot of work, to sail upwind would be very difficult having to remove a sail at sea. Won't it be better to have two independent sails. Ie a geona and spinnaker
![Getting Ready to Sail Downwind- Sailing Uma [Step 94]](http://i.ytimg.com/vi/wf8u4QOdgR8/mqdefault.jpg)
This is a very cool video and very informative, but one important note: to reduce roll, you should tighten the headsails flat. You will loose a small amount of sail area and speed, but the roll of the boat will be substantially reduced. Having "bagginess" in the headsails sets up a oscillation as the center of effort moves back and forth as the boat rolls. This causes a large roll to the vessel. Money spent in larger whisker poles is worth it for this reason. Or if you have to, furl slightly to allow the sails to flatten out. This has been our experience.
Good points
I'll add, to get the head sails flat you do need a pole down haul to remove any twist. Some poles, heavy ones particularly don't have downhauls rigged as standard.
No, actually it doesn't. The curve of the sails acts as a chute and, when the boat rolls, the air is forced down to counteract the roll, i.e. the downward force always opposes the roll. You can see it in action - here: ua-cam.com/video/sy53gIOrE40/v-deo.html
Brilliant
thats pretty cool.
could you do something like this with a cutter staysail and jib if you reefed the jib a little?
Seems a lot of work, to sail upwind would be very difficult having to remove a sail at sea.
Won't it be better to have two independent sails. Ie a geona and spinnaker
Far too complex. A 'Twizzle rig' achieves exactly the same benefits without half of these complexities and half the number of halyards.