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Wing mast trim

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(@jbecker)
Posts: 105
Mate Registered
Topic starter
 
[#30436]

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?


 
Posted : July 21, 2014 8:38 am
(@Anonymous 40990)
Posts: 54
 

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


 
Posted : July 21, 2014 5:50 pm
(@_removed-account)
Posts: 15030
Four Star Admiral Registered
 

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


 
Posted : July 21, 2014 6:03 pm
(@jbecker)
Posts: 105
Mate Registered
Topic starter
 

Good references. Thanks!


 
Posted : July 21, 2014 9:25 pm
(@rehmbo)
Posts: 541
Chief Registered
 

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.


 
Posted : July 22, 2014 8:55 am
(@jbecker)
Posts: 105
Mate Registered
Topic starter
 

I'm totally geeky all the time. <img src="<>/cool.gif" alt="cool" title="cool" height="15" width="15" /> Thanks for the Tom Speer links.


 
Posted : July 22, 2014 5:33 pm
Mpls_Nacra
(@FozzyBear)
Posts: 54
Lubber Registered
 

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


 
Posted : July 29, 2014 12:00 pm
Ryan
 Ryan
(@RG7351)
Posts: 28
Lubber Registered
 

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..


 
Posted : July 30, 2014 9:35 pm
(@felixshmak)
Posts: 7
Lubber Registered
 

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)


 
Posted : August 26, 2014 12:32 pm
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