Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-04-2012, 02:45   #16
Registered User
 
Hoohaa's Avatar

Join Date: Jul 2011
Location: Sydney Aus
Boat: Swarbrick 40
Posts: 518
Images: 10
Re: Raising the Boom

Thanks Nemo That would be great.
removed the Boom today and have a couple more pics.
Click image for larger version

Name:	DSCF1296.jpg
Views:	99
Size:	420.6 KB
ID:	39363
Click image for larger version

Name:	DSCF1297.jpg
Views:	93
Size:	431.4 KB
ID:	39364
If I raise it to far I will have to grind away part of the sail track in order to leave enough room to feed the sail in. This job keeps getting bigger.
__________________

__________________
Hoohaa is offline   Reply With Quote
Old 01-04-2012, 03:05   #17
Moderator
 
Pete7's Avatar

Cruisers Forum Supporter

Join Date: Aug 2009
Location: Solent, England
Boat: Moody 31
Posts: 8,524
Images: 14
Re: Raising the Boom

If the boom undergoing a refurb that gives you another interesting possibility. The goose neck attaches to the middle of the boom at the moment. If a new end cap was made for the boom it could have the goose neck fitting below the boom.

This keeps the existing goose neck fitting and probably the space to feed in the main sail into the track.

Pete
Attached Thumbnails
Click image for larger version

Name:	CF.JPG
Views:	102
Size:	12.2 KB
ID:	39365  
__________________

__________________
Moody 31 - April Lass
Pete7 is offline   Reply With Quote
Old 01-04-2012, 18:46   #18
Registered User
 
Hoohaa's Avatar

Join Date: Jul 2011
Location: Sydney Aus
Boat: Swarbrick 40
Posts: 518
Images: 10
Re: Raising the Boom

You have got me thinking Pete.
I currently have the boom stripped down in my garage, looks structurally sound. So I think its going to get e new paint job.
I have attached a pic of the goose neck, are they usually a solid piece? If so, looks like I will have to destroy it to get it off.
Do the goose necks usually come in one piece or do they normally screw together?
Click image for larger version

Name:	DSCF1313.jpg
Views:	95
Size:	410.2 KB
ID:	39382
Click image for larger version

Name:	DSCF1312.jpg
Views:	90
Size:	386.8 KB
ID:	39383
__________________
Hoohaa is offline   Reply With Quote
Old 01-04-2012, 19:01   #19
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,003
Send a message via Yahoo to roverhi
Re: Raising the Boom

It's not that big a thing to grind off the sail track to raise the mast boom fitting. Had to do that when I got the new boom for the boat. Offsetting the boom from it's attachment point to the mast will require a bit of engineering. The vertical distance from the center of the boom to the mast jaws would greatly increase the load on all the pieces involved. Possible to go that route but way easier, undoubtedly stronger and way cheaper just to move the mast fitting up and use everything you've got. You won't be significantly affecting the integrity of the mast. If it did the mast would have failed when the boom was moved previously.
__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Old 01-04-2012, 20:00   #20
Registered User
 
Hoohaa's Avatar

Join Date: Jul 2011
Location: Sydney Aus
Boat: Swarbrick 40
Posts: 518
Images: 10
Re: Raising the Boom

Thanks Peter, I think thats the way I will go.
Do you know anything about those goose necks? I put it in the vise to see if it would unscrew, no luck. I think its one solid bolt so I may have to cut it off and hopefully buy a one which comes in 2 parts and screws together. If available.
On a plus, the precast end cap is in good nick.
__________________
Hoohaa is offline   Reply With Quote
Old 01-04-2012, 22:33   #21
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,003
Send a message via Yahoo to roverhi
Re: Raising the Boom

I must have missed something. why do you need to remove the boom goose neck attachment?? Thought you were just going to raise the attachment to the mast.
__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Old 01-04-2012, 22:49   #22
Registered User
 
Hoohaa's Avatar

Join Date: Jul 2011
Location: Sydney Aus
Boat: Swarbrick 40
Posts: 518
Images: 10
Re: Raising the Boom

Its bent, so thought I would just replace it while I have the opportunity.
__________________
Hoohaa is offline   Reply With Quote
Old 02-04-2012, 06:29   #23
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,573
Images: 240
Re: Raising the Boom

Unless you have an unusually thick extrusion, Id use rivets rather then threaded bolts.
Rule of Thumb: For an Aluminium female thread (mast), the thread engagement of a steel bolt should be at least 2 Nominal diameters of the thread.
Hence, a 1/4" diameter (20 TPI) bolt, should have about 10 threads engaged (" thick mast), to ensure that the length of the screw engagement will be sufficient to carry the full load necessary to break the screw, without the threads stripping (the preferred failure mode).
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 02-04-2012, 07:49   #24
Certifiable Refitter/Senior Wannbe
 
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 7,330
Re: Raising the Boom

Quote:
Originally Posted by Hoohaa View Post
Its bent, so thought I would just replace it while I have the opportunity.
Going by the earlier photos you posted, it seems very small to my (possibly uneducated) mind. Can this be beefed up?
__________________
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 03-04-2012, 16:34   #25
Registered User
 
Hoohaa's Avatar

Join Date: Jul 2011
Location: Sydney Aus
Boat: Swarbrick 40
Posts: 518
Images: 10
Re: Raising the Boom

Just a quick question. If I get the boom powder coated, it will be placed in an oven. Is it OK to do this?
__________________
Hoohaa is offline   Reply With Quote
Old 03-04-2012, 17:10   #26
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,003
Send a message via Yahoo to roverhi
Re: Raising the Boom

Painting aluminum spars is a lost cause. No matter how careful you are in the application and use, it will look like bad within a very few years. You'll get scrapes, abrasion, nicks and bubbling from galvanic corrosion around fasteners and hardware. That is using the proper aluminum paint system with it's exacting multi step process. Just watched two guys work 8-10 hours a day for more than a week prepping and painting an aluminum mast that they'd done only 5 years before.

Powder coating is a non starter. Any break in the plastic surface allows corrosion to work under the coating. Within a short time, the powder coat is coming off in sheets. Powder coating is a boon to the manufacturer cause it looks pretty and gets the product sold. Unfortunately, it begins to look like crap in a very short time because of creeping corrosion. It's especially bad around salt water.

If it was me, would leave the boom naked and let aluminum's naturally forming surface corrosion protect the metal.
__________________

__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Reply

Tags
ais

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
The Philosophy Behind Sailing Simply and Cheaply s/v Beth General Sailing Forum 759 30-01-2017 22:51
How Good are the Navionics Canadian Charts ? Safari38LH Marine Electronics 12 04-04-2012 17:02
Raising the Boom Hoohaa Deck hardware: Rigging, Sails & Hoisting 25 03-04-2012 17:10
60 Feet on the Chesapeake DSDman Dollars & Cents 87 03-04-2012 17:09
For Sale: Boom 11'6'' gaglur Classifieds Archive 1 31-03-2012 20:25



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:03.


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.