Walt,

If you look at the picture, you will see that the Sail is set on the Lee
side of the Back Stay. With the Runner Set there is no way that the Main
Boom can be brought in.

I'm sorry if I miss lead you though. A RUNNING SAIL is a sail not set on
a stay, used mostly on conditions of working down wind, being broad
reaching or dead downwind. It is a Three point, free Flying sail not
unlike a Spinnaker. As you can see in the picture, it is set to sail on
that Tack. It will have to be lowered to even Jibe. It cannot be used UP
WIND because it will interfer with the Main Sail Boom.

It's a Running Sail, Set for the Tack that the boat is Sailing, which is
Before the Wind. Common called Running


http://community.webtv.net/tassail/ILLDRINKTOTHAT