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#274053 - 07/21/14 07:38 AM Wing mast trim  
Joined: Jan 2005
Posts: 105
jbecker Offline
member
jbecker  Offline
member

Joined: Jan 2005
Posts: 105
Bloomington, IN
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?


Jeff
Tiger 849
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#274061 - 07/21/14 04:50 PM Re: Wing mast trim [Re: jbecker]  
Joined: Feb 2012
Posts: 54
dr5e14w Offline
journeyman
dr5e14w  Offline
journeyman

Joined: Feb 2012
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

#274062 - 07/21/14 05:03 PM Re: Wing mast trim [Re: jbecker]  

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

#274065 - 07/21/14 08:25 PM Re: Wing mast trim [Re: ]  
Joined: Jan 2005
Posts: 105
jbecker Offline
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jbecker  Offline
member

Joined: Jan 2005
Posts: 105
Bloomington, IN
Good references. Thanks!


Jeff
Tiger 849
#274071 - 07/22/14 07:55 AM Re: Wing mast trim [Re: jbecker]  
Joined: Nov 2011
Posts: 370
rehmbo Offline
enthusiast
rehmbo  Offline
enthusiast

Joined: Nov 2011
Posts: 370
SE MI / NE IN
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.

Last edited by rehmbo; 07/22/14 08:05 AM.

Jeff R

H18, C2 USA1193
cramsailing.com
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#274086 - 07/22/14 04:33 PM Re: Wing mast trim [Re: rehmbo]  
Joined: Jan 2005
Posts: 105
jbecker Offline
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jbecker  Offline
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Joined: Jan 2005
Posts: 105
Bloomington, IN
I'm totally geeky all the time. cool Thanks for the Tom Speer links.

Last edited by jbecker; 07/22/14 04:33 PM.

Jeff
Tiger 849
#274278 - 07/29/14 11:00 AM Re: Wing mast trim [Re: dr5e14w]  
Joined: Mar 2008
Posts: 55
Mpls_Nacra Offline
journeyman
Mpls_Nacra  Offline
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Joined: Mar 2008
Posts: 55
Minneapolis
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

Last edited by Mpls_Nacra; 07/29/14 11:21 AM.

Dave Foster
Minneapolis
Nacra F16
#274319 - 07/30/14 08:35 PM Re: Wing mast trim [Re: jbecker]  
Joined: Dec 2010
Posts: 4
RG7351 Offline
stranger
RG7351  Offline
stranger

Joined: Dec 2010
Posts: 4
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..

#274997 - 08/26/14 11:32 AM Re: Wing mast trim [Re: jbecker]  
Joined: Feb 2012
Posts: 7
felixshmak Offline
stranger
felixshmak  Offline
stranger

Joined: Feb 2012
Posts: 7
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)


Felix
NACRA F16

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