Hi Randy

Check with your local PHRF authority (assume you already have).  In many areas 
adding a bowsprit to a boat to tack your asym spin affects rating.  If doing 
this and also carrying a symmetric spin and pole can be a penalty adjustment 
(faster rating).  If only the asym and no spin may actually be in your favour

Mike Hoyt
Persistence
Halifax, NS


From: StrightR--- via CnC-List <cnc-list@cnc-list.com>
Sent: July 11, 2022 6:02 AM
To: 'Randy Stafford via CnC-List' <cnc-list@cnc-list.com>
Cc: cnc-l...@cnc-list.co; strig...@eastlink.ca
Subject: Stus-List Asym Rigging and Trim

Hi Randy comments below:

1. Leading the tack line - I'm repurposing the foredeck padeye and block, 
side-deck fairleads, and cabin-side cam cleat for my former pole down line to 
run the asym tack line, which of course goes through the bowsprit lengthwise.  
My pole down line is too short to be the asym tack line, so I've repurposed a 
little-used genoa sheet.  I figure if the deck hardware was sufficient for a 
symmetrical pole down line, it ought to suffice for an asym tack line.  Am I 
wrong?

Might be bigger diameter than you need if you were using high tech line but 
will work.  Bigger lines create more of a tripping hazard on the foredeck.  We 
keep our tackline close to the deck to prevent it from becoming a tripping 
hazard

2. Where to put the turning blocks for the asym sheets: same place as for the 
symmetrical, or farther forward?  For the symmetrical turning blocks I use 
snatch blocks at the stern pulpit braces.

If the A2 was cut for the extended pole length the turning blocks will likely 
need to be further aft than the spin sheets.  Probably start out in the same 
place as it sounds like you are as far aft as you can be.  We use tweakers 
depending on how deep you are sailing the sheets may need to be adjusted to 
trim the sail and adjust the leech.

3. What winch to lead to / where to trim from?  My main competitor leads his 
asym sheets to cabintop winches, and trims from the windward side deck so the 
trimmer can see the whole sail.

High side cabin top, avoid the A2 sheet getting tangled with the main sheet.

4. When and how much to ease the tack line?  By default I assume it's tensioned 
so that the aysm's tack is at the bowsprit and the luff is taut, but it can be 
eased - how much, and under what conditions?

You will need to experiment with how much to ease the tack line and it will 
depend upon wind strength and how deep you are sailing.  Generally downwind  if 
the tack line falls off to leeward you will likely need to tighten it, if it 
rotates to windward that is golden.  Ours normally eased a few feet downwind. 
Reaching likely as tight as you can get it unless it is really light.

Thanks in advance for any wisdom you might share.

Fun fact: the sail is black, with a logo of an M67 grenade on both sides, 
because of the etymology of my boat's name, and because of her color scheme 
(red topsides, white deck and cabintop, black canvas.

Cheers,
Randy Stafford
SV Grenadine
C&C 30 MK I #79
Ken Caryl, CO

Rod Stright
C&C 99 Halifax

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