On 21/03/2013 18:16, Brian Gaff wrote:
Does this mean then that if you set up anice sailing bot in behind the
windfarm, it will be becalmed?

No, but the wind will be reduced. There's a limit to how much power you
can take out of the wind before you stop it completely and new wind with
extra energy can't get to you. It has a name, but I forget it.

Andy