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 Catalina 25 Specific Forum
 Backstay adjuster part 2 ...		  New Topic  Topic Locked
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C25BC
Navigator

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Canada
200 Posts
Initially Posted - 05/22/2017 :  09:08:40  Show Profile
I installed my new backstay adjuster this weekend , setting the uppers at around 30 ,the forward lowers at 25 ,the aft lowers slack at about 5 the backstay was slacked to about six inches and forestay slack as well couldn't say for sure how much found it hard to tell withe the extrusion on . And when I tensioned the adjuster it put more slack on the lower afts , isn't it supposed to tighten them when you apply tension to the adjuster ? And any tips on how I can set this rigging ? I previous had mentioned the issue I had with my rigging was I could not get a rake in my mast .
Angus
S.V.Tempus
#4748
1984 Catalina 25 SK/SR/Trad.

Heartbeat
Navigator

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USA
161 Posts
Response Posted - 05/22/2017 :  10:57:14  Show Profile
I am having a little trouble following you, but I'll give you Matt's nickel tour to C25 rig tuning. (I don't use a rig gauge.)

Adjustable backstay. Heartbeat put in a double cascade to a 6:1 for a total purchase of 24:1, which it what I needed to get the extrusion to bend. Lots of extra line so I can make the forestay flop around with 6" slop if needed for fractating.

Sidestays do all the work. The leeward stay should be taut when going to wind at 15 degrees of heel hard on the wind and boat at ~6 knots. If not, they are too loose.

Front lower stays should be just lightly tighened to keep the track straight and mast straight fore/aft with no backstay on.

Rear lowers stay should be loose (inches of play) with no backstay on. If they aren't you can't get any curvature to the extrusion. Heartbeat used to get 3-4" of curvature when you want to flatten the main when the wind is over 20 knots. Yes, they do lose that slack when the backstay is on.

-Matt
former Captain of Heartbeat
Catalina 25 Tall
#4816
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Heartbeat
Navigator

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USA
161 Posts
Response Posted - 05/22/2017 :  11:01:49  Show Profile
quote:
Originally posted by C25BC

isn't it supposed to tighten them when you apply tension to the adjuster ? And any tips on how I can set this rigging ? I previous had mentioned the issue I had with my rigging was I could not get a rake in my mast .


So upon re-reading, it appears when your backstay is off, you are canting the whole mast forward. Crank on the backstay until the aft lowers are slack. (You have just pulled the mast rearward and now the forestay is taut.) Then crank on the backstay more until you see some curvature in the extrusion. The aft lowers should harden back up.

The C25 extrusion is big. It takes a load of backstay to get rake.

Matt
former Captain of Heartbeat
Catalina 25 Tall
#4816
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Derek Crawford
Master Marine Consultant

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USA
3312 Posts
Response Posted - 05/24/2017 :  08:33:21  Show Profile
"The leeward stay should be taut when going to wind at 15 degrees of heel hard on the wind and boat at ~6 knots. If not, they are too loose"

The leeward stays don't do a thing at this time and if they are taut they are too tight. The windward stays are doing all the work.
Derek Crawford
Chief Measurer C25-250 2008
Previous owner of "This Side UP"
1981 C-25 TR/FK #2262 Used to have an '89 C22 #9483, "Downsized"
San Antonio, Texas
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Steve Milby
Past Commodore

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USA
5851 Posts
Response Posted - 05/24/2017 :  10:06:29  Show Profile
I agree with Derek.

There's a difference between having the leeward shrouds "loose" and having them "relaxed." If they are "loose," then when the boat tacks or gybes or rolls sharply on a wave, the whole rig will gain momentum before it is brought up short by the loose shroud. That is very hard on the cable, fittings and attachments. I like to see the leeward shroud just become "relaxed" when sailing closehauled in about 10-12 kt winds. It doesn't unnecessarily load up the chainplates, but it restricts the lateral movement of the rig.
Steve Milby J/24 "Captiva Wind"
previously C&C 35, Cal 25, C25 TR/FK, C22
Past Commodore
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.