Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-11-2010, 05:54   #1
Registered User
 
Blue Crab's Avatar

Join Date: Sep 2009
Location: Hurricane Highway
Boat: Cal 29
Posts: 3,882
Masthead Fittings

Beware the bargain boat. Short version: I am doing lots of rework on a much modified Cal 25. I was attracted to this boat in that I've had two Cals and like the sailing ability, it has a 12 hp diesel, Harken furler, nice full batten main, a 30 amp elec system, and standup headroom, none of which were offered as new back in 1971. Oh, and you can guess that the boat was as close to free as you can get.

My current problem is as pictured. I'm guessing this came as a result of raising the cabin top more than a foot with the attendant lengthening of the stays and shrouds. The boat has been sailing this way with the masthead elevated about 1/2" above the mast. It pivots on the bolt and the mast has been cutaway to allow ... what?

Maybe I just don't know what I'm looking at here. Note reinforcement of the extrusion at pivot. Yes, it's lubberly, and those sharp corners on those homemade tangs gotta go but filling, then redrilling the pivot hole (and it ain't supposed to pivot anyway) ... I guess my question is: It's ugly but doesn't appear to be broke. Should I fix it?

Thanks
Attached Thumbnails
Click image for larger version

Name:	DSC00048.JPG
Views:	147
Size:	236.4 KB
ID:	21454   Click image for larger version

Name:	DSC00073.JPG
Views:	131
Size:	150.2 KB
ID:	21456  

Click image for larger version

Name:	DSC00074.JPG
Views:	136
Size:	282.1 KB
ID:	21457  
__________________

__________________
Blue Crab is offline   Reply With Quote
Old 24-11-2010, 14:47   #2
Registered User
 
Blue Crab's Avatar

Join Date: Sep 2009
Location: Hurricane Highway
Boat: Cal 29
Posts: 3,882
On further review, it's clear that the mast has been lopped off the top to fit boat. Ditto mainsail. I am now thinking that the masthead fitting isn't original or even originally made to fit this particular mast. The longer I stare at things I realize the reinforced "pivot" point is just where the shrouds attach. I suspect the reason the cap fitting isn't flush is that the PO just didn't want to redrill that through hole in the cap fitting. Since I know the PO to be handy with tools, I'm now thinking the cap sits up 1/2" probably to accomodate the length of the furler. Guess my question remains, anything dangerously wrong with leaving the set up as is?
__________________

__________________
Blue Crab is offline   Reply With Quote
Old 24-11-2010, 16:41   #3
Registered User

Join Date: Dec 2008
Location: ontario canada
Boat: grampian 26
Posts: 1,743
Looks like a real hack job. I am no expert but since a mast is a compression post it would seem that the entire compression load on the mast would be borne by that one bolt in shear. If it were my boat I would fill in the space between the top of the mast and the cap.
__________________
perchance is offline   Reply With Quote
Old 24-11-2010, 17:45   #4
Registered User

Join Date: Dec 2009
Posts: 3,016
Images: 4
The aft masthead crane is designed to bend the mast slightly forward as the backstay tightens. That being the proper way to bend. Your swivel feature makes that unlikely. Maybe you have forward lower shrouds? Looks like an abomination to me.
__________________
daddle is offline   Reply With Quote
Old 24-11-2010, 18:00   #5
Registered User
 
NotQuiteLost's Avatar

Join Date: Sep 2010
Location: Paradise (better known to most people as: Philippines)
Boat: 65' Custom Steel Ketch
Posts: 322
Images: 4
Not an expert by any stretch of the imagination, but my understanding is that there's quite a bit of engineering to mast heads. I hate to be the first to do so, but I'd suggest you get a rigger to look it over. It's small enough that you could probably do the actual work yourself, but I'd really want some professional guidance before trusting my boat (and everything on it, including myself) to a single stainless bolt, which is what this kind of looks like.
NotQuiteLost is offline   Reply With Quote
Old 25-11-2010, 01:37   #6
Registered User
 
Blue Crab's Avatar

Join Date: Sep 2009
Location: Hurricane Highway
Boat: Cal 29
Posts: 3,882
Thanks guys. I posted for confirmation. Several of my pals thought I could use it as is but the real rigger said no, that I'd have to make the cap fit flush without further explanation. Since I know the boat sailed this way I was hoping to get by quick and dirty. It hadn't yet occured to me that all the down force is on that one bolt but it surely is. The rigger didn't think much of the compression post the PO added either.

Well, better now on the cradle in the yard than on splash day. Making the cap flush is no biggie but dropping the cap 1/2" is going to effectively lengthen all the rigging. I may have that much adjustment all around but I guess I just won't know for sure til I attempt to step the mast; geometry being yet another of the many disciplines I haven't mastered. All the wire looks brand new or this would be a non-issue.
__________________

__________________
Blue Crab is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Masthead Issue Drew13440 Electrical: Batteries, Generators & Solar 3 29-07-2010 14:58
Do I Really Need a Masthead Antenna ? unbusted67 Marine Electronics 14 23-05-2010 13:21
Too Many Antennas at the Masthead ? Dockhead Marine Electronics 2 07-02-2010 18:27
What co-ax for masthead VHF? Weyalan Marine Electronics 16 26-06-2008 07:53
fractional or masthead which is best? philip van praag Multihull Sailboats 24 20-06-2007 09:28



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:24.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.