I recently moved from an old Tiger to a less old Viper. I've heard setting the rotation on the "wing mast" type of mast can have a significant effect on performance. Any tips on how to find the ideal mast rotation settings upwind/downwind?

See the link below for basic upwind and down wind information for the viper.

http://www.goodalldesign.com.au/Catamaran/index.php/owners-corner/tuning/32-c2-general-settings-2

More reading here. This one includes theory not just numbers.

Good references. Thanks!

If you're feeling especially geeky, check this one: http://www.tspeer.com/Wingmasts/teardropPaper.htm

Or this one written by the same guy - a bit more readable: here

BTW - Mr. Speers knows his stuff. I'll let you Google him.

I'm totally geeky all the time. Thanks for the Tom Speer links.

This is a great work sheet. Any one have this for the Nacra F16?

http://www.goodalldesign.com.au/Catamaran/index.php/owners-corner/tuning/32-c2-general-settings-2

Thanks
Dave

Dave, here you go:

http://www.lindstaedt.com/manuals/basic_trimsheet_nacra_f16.pdf

I have found that the Nacra F16 is sensitive to setup, especially upwind. But maybe this is true of all the F16s? I'm only starting to figure out my new boat..

Dave,

Personally, I think the Linstaedt trim sheet value on the diamond tension is far too tight though. I am using 25 on PT1 gauge for around 10 knots of wind for 2 up (28 on PT1 for 1 up)