Originally Posted by CarbonSink62
When I installed my Davis Windex at the start of the 2012 season, the instructions said to set the tabs at 45deg for racing boats and 55deg for 'other auxiliaries'. I know the Catalina 25 isn't a race boat, so I used 55.
I works like a charm. As I start to head up, the sails will luff just as the vane hits the tab. If I keep the vane in between the tabs, all is well. It also works well for people learning how to helm while reaching.
So, to answer the OP's question: On my boat, the way I sail it, 55 degrees.
You probably meant "If I keep the vane outside the tabs all is well".
The vane between the tabs means your sails are luffing.