[C320-list] Boom Repairs for C320

[Scott Thompson]

You have gotten a few responses about the reef line but none about the 
outhaul. Replacing the outhaul line is on my "to do" list for this 
Spring. The standard outhaul is a 3 to one purchase. The "adjustment 
line" (the one you pull) enters at the gooseneck, runs to a floating 
block inside the boom, then forward to a fixed block inside the boom at 
the gooseneck end, then back to the floating block, where it is tied off 
on a becket. This gives a 3 to one purchase on the floating block. There 
is a second line tied to the shackle of the floating block that exits 
the aft end of the boom for tying off at the clew of the mainsail. The 
best way to replace the adjustment line is to use the second line (the 
one that attaches to the sail) to pull the floating block close to the 
aft end of the boom, where you can grab and extract it through the end. 
You then have access to both ends of the adjustment line, and can use 
the old line to pull a new one through. For this to work, the adjustment 
line needs to be at least 3 times the length of the boom. If it has been 
shortened you may need to attach a messenger line to the end that goes 
into the forward end of the boom in order to lengthen it enough so that 
you can extract the floating block from the aft end of the boom.

It may help you to take a look at page 13 of the "Mast & Boom Handbook" 
at https://c320.org/filemgmt/visit.php?lid=49 which shows the basic 
hardware. As pictured, the left side of the photo would be the aft end 
of the boom and the right side would be the mast end. Block 1 in that 
picture is the floating block and block 2 is the fixed block. The line 
pictured is what I've called the "adjustment line." The line that 
connects the floating block to the sail is not pictured, but would 
attach to the shackle of block 1. The only way to access block 2 is to 
take apart the boom, which is a big deal.

Scott Thompson

Surprise, #653 (1999)



On 4/26/2018 4:58 PM, millers1 at aol.com wrote:
> I have a 2000, #680, non-furling Main Boom.
> Looked on the discussion site, not much on the boom  and  the sketch supplied by Catalina
> is marginal....
> Has anyone re-run the reef lines and out haul line in the boom???.... any sketches ??
> Thanks
> Art
>
>
>
> -----Original Message-----
> From: John Morrison <sail-ability at sympatico.ca>
> To: C320-List <C320-List at Catalina320.com>
> Sent: Mon, Apr 23, 2018 7:21 am
> Subject: Re: [C320-list] Dinghy Hard bottom Aluminum vs. Fiberglass open ended question
>
> AL clearly the way to go. I have a Walker Bay rib which has the ABS Hull very rugged but for a similar sized AL rib it’s about 30lb heavier. Also I went with the hypalon tubes instead of the PVC. Unless the dinghy is continually in the Sun PVC is just fine. I’ve been looking at the Highfield products and wud buy one of them.
>
> Sent from my iPhone
>
>> On Apr 23, 2018, at 5:03 AM, Scott Westwood <scottwestwood at bellsouth.net> wrote:
>>
>> We are starting to do homework on replacing our dinghy once/if  we get davits.
>> We are leaning towards hard bottom dinghy and hearing pros and cons of Aluminum vs fiberglass.
>> Any thoughts out there?
>> So far, we are hearing that Aluminum is lighter.  Not much else yet.
>> Thanks,
>> Scott Westwood scottwestwood at bellsouth.net H (919)-362-8538    C (919)-618-7185