Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 08-03-2017, 22:28   #16
Senior Cruiser
 
StuM's Avatar

Cruisers Forum Supporter

Join Date: Nov 2013
Location: Port Moresby,Papua New Guinea
Boat: FP Belize Maestro 43 and OPBs
Posts: 12,889
Re: Compression post alignment

So you've managed to rebuild the mast foot area and got mast foot, deckplate and compression post back together within 0.7 of plumb, presumably before you have tensioned the rig. Sounds pretty good to me

Is your mast currently sitting within 0.7 of where it will be when your rigging is tensioned?
StuM is offline   Reply With Quote
Old 09-03-2017, 06:23   #17
Registered User
 
rognvald's Avatar

Join Date: Jan 2011
Location: Now based on Florida's West coast
Boat: Pearson 34-II
Posts: 2,467
Images: 5
Re: Compression post alignment

"So far so good, except it appears that the internal roof plate has developed a kick upwards at the forward end ( only maybe 5mm), so that when the post is screwed home it misses its connecting plate in the bilge 2m below, by around 35mm ( missing forwards as the post is slanting from aft to forwards)." Sulaire


For the sake of academic argument, why doesn't this bother everyone when the goal is a sound, clean installation? If it were my boat, this would be corrected to original specs and the bend removed or the plate replaced before going to step 2. This is what we call "Mickey Mouse" up North. Best, R P.S. We're talking about a compression post assembly for the main mast. Seems important.
__________________
"And those who were seen dancing were thought to be insane by those who could not hear the music."
Friedrich Nietzsche, Thus Spake Zarathrustra
rognvald is offline   Reply With Quote
Old 10-03-2017, 08:04   #18
Registered User
 
Sulaire's Avatar

Join Date: Oct 2011
Location: Planet earth
Boat: Hans Christian 41
Posts: 300
Re: Compression post alignment

I decided to take it all apart again and investigate further.... everything holds true until the last turn on the front bolts on the mast plate on deck, when the plate underneath on the saloon roof pulls up at front which in turn offsets the post forward 25mm at the bottom.

I put in a few shims, only 3mm was required, tightened everything up again and the post sits where it should.

Now i have the solution i need to take the whole thing apart again and clean the bolts and holes of sikaflex before a final fit.....

I think the reason was that the aft bolts were screwing home , but the front ones were not and as a result were pulling up after the rest were tight?

Anyway, thanks for the wake up call rognvald.
Sulaire is offline   Reply With Quote
Old 10-03-2017, 08:27   #19
Registered User
 
Cheechako's Avatar

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,148
Re: Compression post alignment

Quote:
Originally Posted by psk125 View Post
Sounds like you needed to leave the post in place while you worked on the rotted deck/cabin top section. I would be tempted to undo the post from the top and attach the post at the bottom, then perhaps put a metal shim in place between the top plate and the underside of the deck/cabin top to make the pieces mate up properly. You don't want to go around bending stuff.
It's a bit hard to understand, but This ^^^ is generally what I would do, but bolt the bottom and top loosely and shim the end plates as needed where there is a gap. They are probably not perfectly square to the tube. I had no idea HC used any deck stepped masts. Not that I'm against them.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 12-03-2017, 09:34   #20
Registered User
 
Sulaire's Avatar

Join Date: Oct 2011
Location: Planet earth
Boat: Hans Christian 41
Posts: 300
Re: Compression post alignment

And that is what I did, thank you all for the feedback, i guess with all the jobs i am undertaking the detail got lost in the big picture!

Its been a busy few months of refit, but near the end now and looking forward to getting underway again.
Sulaire is offline   Reply With Quote
Reply

Tags
compression, men

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Propshaft Alignment AaronJ Engines and Propulsion Systems 20 15-03-2010 19:22
How to Check Pulley Alignment jdoe71 Engines and Propulsion Systems 36 02-12-2009 09:52
Engine Alignment The Mons Engines and Propulsion Systems 38 18-08-2009 17:32
Planetary Alignment GordMay The Library 3 25-03-2004 14:38

Advertise Here


All times are GMT -7. The time now is 07:26.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.