Our boat won't. That is, it doesn't want to. If you get it sailing downwind with the genny up and then roll up the genny it will continue sailing downwind. But if you do anything to bring the wind forward of the beam it will refuse to sail. Can't do a chicken gibe, it will not make it around even with 5 knots boat speed going into it.
Typically, the thing will just sit there and slide sideways through the water with the nose pointed into the wind at about 50 degrees. It should sail, but it doesn't. The helm does nothing, put it over either way and it just stalls. Even if you get some forward boat motion the helm does nothing. Sometimes it will drift backwards as it slides sideways, but mostly it just slides sideways through the water, nicely hove to.
I know why this, too much force too far aft, but what can be done about it? If you put your main alone up, can you actually sail upwind, or even on a beam reach? Or downwind? Ours will do none of these without assist from the engine to get it going in the right direction, and it will not sail to weather or even on beam reach without the engine, it just rounds up into the wind and stalls.
I see other boats sailing on the main alone all the time, especially the racer crowd between races.
I'm thinking you've lost your engine and your roller genny is jammed. Now you're hosed. What do I need to do to make this work?