Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-04-2014, 14:16   #16
Registered User
 
DumnMad's Avatar

Join Date: Mar 2012
Location: Nelson NZ; boat in Brisbane
Boat: 45ft Ketch
Posts: 1,246
Re: Douglas Fir boom question

Dowels are good.
If you try to straighten it choose warm humid weather, or in the shed, wet the timber and warm up the area to be straightened. Less likely to crack.
Its obviously been wet in order to rot and this is a possible contributor to the sag. I suggest seal it with Cetol when you've finished.
__________________

__________________
DumnMad is offline   Reply With Quote
Old 24-04-2014, 15:24   #17
Registered User
 
SV Windrush II's Avatar

Join Date: Dec 2013
Location: Somewhere in the Philippines
Boat: Mariner 40 Ketch
Posts: 452
Images: 18
Re: Douglas Fir boom question

Quote:
Originally Posted by DumnMad View Post
Dowels are good.
If you try to straighten it choose warm humid weather, or in the shed, wet the timber and warm up the area to be straightened. Less likely to crack.
Its obviously been wet in order to rot and this is a possible contributor to the sag. I suggest seal it with Cetol when you've finished.
:thumbup:

Sent from my SGH-T999L using Cruisers Sailing Forum mobile app
__________________

__________________
Mariner 40 Ketch
SV Windrush II is offline   Reply With Quote
Old 24-04-2014, 22:32   #18
Registered User

Join Date: Nov 2009
Location: Charlotte, NC
Boat: Abbott36 Montock17
Posts: 37
Re: Douglas Fir boom question

Quote:
Originally Posted by DumnMad View Post
Dowels are good.
If you try to straighten it choose warm humid weather, or in the shed, wet the timber and warm up the area to be straightened. Less likely to crack.
Its obviously been wet in order to rot and this is a possible contributor to the sag. I suggest seal it with Cetol when you've finished.
Click image for larger version

Name:	ImageUploadedByCruisers Sailing Forum1398399993.671525.jpg
Views:	75
Size:	243.8 KB
ID:	79808Click image for larger version

Name:	ImageUploadedByCruisers Sailing Forum1398400012.049604.jpg
Views:	72
Size:	330.0 KB
ID:	79809

Ok, added 5 3/8" dowels 8" apart...
Man I have no idea what I'm doing, but I sure am having fun doing it!
Thanks for all the tips...

And I must say I am in complete awe of how much work gets done on that schooner !
__________________
Starboardyacht is offline   Reply With Quote
Old 24-04-2014, 22:45   #19
Registered User

Join Date: Nov 2009
Location: Charlotte, NC
Boat: Abbott36 Montock17
Posts: 37
Re: Douglas Fir Boom Question

Too late for the wet bending, but not too late to put rigging back as it was instead of flipping... Hope to be sailing her to Beaufort this weekend for the wine & food festival...

Bye the bye, not sure if this is correct but I'm coating spars with 2 coats of epoxy from Home Depot not WE$T... Then 3 coats of Helmsman spar varnish ...
Cheers!
__________________
Starboardyacht is offline   Reply With Quote
Old 25-04-2014, 02:44   #20
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Douglas Fir boom question

Quote:
Originally Posted by Starboardyacht View Post
Attachment 79808Attachment 79809

Ok, added 5 3/8" dowels 8" apart...
Man I have no idea what I'm doing, but I sure am having fun doing it!
Thanks for all the tips...

And I must say I am in complete awe of how much work gets done on that schooner !


You really should have scarphed that. I wouldn't rely on it much like that. A dowel used this way is called a treenail (pronounced trunnel). They won't make any difference to the weak spot you've created with that joint though. I'd think it would be easier to just laminate a new spar now, given the size. If you do it right, then it'll be dimensionally stable instead of cupping or twisting, as solid spars do.




Putting cetol on a spar?
__________________
O you who turn the wheel and look to windward,

Consider Phlebas, who was once handsome and tall as you.
minaret is offline   Reply With Quote
Old 25-04-2014, 03:14   #21
Moderator
 
JPA Cate's Avatar

Join Date: Nov 2011
Location: aboard, cruising in Australia
Boat: Sayer 46' Solent rig sloop
Posts: 10,673
Re: Douglas Fir Boom Question

Minaret,

You just got there too late! Great advice, though. Good on ya.

.....When're you - all casting off?

Ann
__________________
Ann, with Jim, aboard US s/v Insatiable II, in Oz, very long term cruisers
JPA Cate is offline   Reply With Quote
Old 25-04-2014, 03:32   #22
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Douglas Fir Boom Question

Quote:
Originally Posted by Ann T. Cate View Post
Minaret,

You just got there too late! Great advice, though. Good on ya.

.....When're you - all casting off?

Ann



Soon! Insanely busy...
__________________
O you who turn the wheel and look to windward,

Consider Phlebas, who was once handsome and tall as you.
minaret is offline   Reply With Quote
Old 25-04-2014, 10:26   #23
Registered User

Join Date: Nov 2009
Location: Charlotte, NC
Boat: Abbott36 Montock17
Posts: 37
Re: Douglas Fir Boom Question

Click image for larger version

Name:	ImageUploadedByCruisers Sailing Forum1398443047.333388.jpg
Views:	78
Size:	303.9 KB
ID:	79831 I'm confused why this may fail...?
A scarf joint did not seem to make sense because the joint would be front to back the lap joint allow me to go side to if that makes sense
__________________
Starboardyacht is offline   Reply With Quote
Old 25-04-2014, 14:33   #24
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Douglas Fir Boom Question

Quote:
Originally Posted by Starboardyacht View Post
Attachment 79831 I'm confused why this may fail...?
A scarf joint did not seem to make sense because the joint would be front to back the lap joint allow me to go side to if that makes sense

Yeah, that's not a lap joint. It's a simple butt, or what's known as a "Dutchman". That's not a compliment in the ship building world. A scarph is always stronger than a butt. Often much stronger. That butt is only as strong as the thickest part of the solid member which remains. Don't trust it.
__________________

__________________
O you who turn the wheel and look to windward,

Consider Phlebas, who was once handsome and tall as you.
minaret 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
Rebuilding Mast Step Area: Douglas Fir vs Marine Plywood arjand Construction, Maintenance & Refit 28 14-07-2011 16:06
Teak and Douglas Fir supplier - Texas texwards Construction, Maintenance & Refit 3 26-01-2009 19:54
Dink fir sale CSY Man Classifieds Archive 0 05-11-2007 20:14



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:04.


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.