igavioli wrote in message ...
I am planning to mount a bow thruster on a 41' Sailboat and i wonder if
someone
knows the influence of the tunnel opening at the bow. Namely how much
the created
turbolence will affect the performance of the sailboat.
In the Vetus Web site, as small as possible tunnels (possibly more than
one) are suggested just to keep the resistance under way low;
unfortunately this very statement
makes me worry!
Thank You. Claudio.

Claudio, normally bow thrusters are mounted on power boats such that
they are out of the water when the boat is on plane. I suspect they
create a lot of drag if they are not out of the water. In your case,
with a sail boat, it would always be in the water. I would talk to a
bow thruster manufacturer (they often have people at the boat shows)
before I installed one, they would know best or they may have models
made for sail boat applications.

John