Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 07-08-2016, 21:15   #1
Registered User

Join Date: Aug 2016
Location: San Sebastián (northern Spain)
Boat: Puma 341
Posts: 6
Raising coachroof tutorial

Hi there

I´ve been long considering a Puma 341 sailboat (Holman & Pie, classic IOR) with deck mounted mast. The boat sails incredibly well.
The drawback is headroom is a bit limited and with just 5 cm (2") more it would make a world of a difference. Floor is already quite low.
Does someone know where can I find something similar to a tutorial?
Just like another sailboat where they did it as long as it´s polyester too.
There has to be someone who did a blog with it or something. Even if in other language.

Thanks in advance
__________________

__________________
blue-eyes is offline   Reply With Quote
Old 08-08-2016, 05:03   #2
Registered User
 
Reefmagnet's Avatar

Join Date: May 2008
Location: puɐןsuǝǝnb 'ʎɐʞɔɐɯ
Boat: Nantucket Island 33
Posts: 2,678
Re: Raising coachroof tutorial

My advice: buy another boat with the desired head room. Increasing headroom with deck surgery will be far more trouble then it's worth. I suspect that is the reason for the dearth of information. It might be possible to increase headroom by removing ceiling panels or adding hatches at particular points, though.

Sent from my SGP521 using Cruisers Sailing Forum mobile app
__________________

__________________
Reefmagnet is offline   Reply With Quote
Old 08-08-2016, 14:10   #3
Registered User

Join Date: Aug 2016
Location: San Sebastián (northern Spain)
Boat: Puma 341
Posts: 6
Re: Raising coachroof tutorial

Well one of the reasons I want such a boat is hull thickness, this is 1" at least, any other 34ft model with enough headroom that I can buy has a lot less.

Another reason is most boats in the 34ft range with enough headroom have a flatter underwater body, they don´t sail upwind with waves as well as they pound much more.

Because they are lighter, beamier and flatter in the underbody the roll acceleration, very related to seasickness, is much worse. The P341 does 0´10 G´s compared to 0.15-0.20 G´s of boats with more headroom.

[IMG][/IMG]

A classic 40 ft is out of consideration because of marina and maintenance costs.

Why is just raising only 2" so difficult if well done? We´re in 2016!
__________________
blue-eyes is offline   Reply With Quote
Old 08-08-2016, 14:18   #4
Registered User
 
Reefmagnet's Avatar

Join Date: May 2008
Location: puɐןsuǝǝnb 'ʎɐʞɔɐɯ
Boat: Nantucket Island 33
Posts: 2,678
Re: Raising coachroof tutorial

Quote:
Originally Posted by blue-eyes View Post
Well one of the reasons I want such a boat is hull thickness, this is 1" at least, any other 34ft model with enough headroom that I can buy has a lot less.

Another reason is most boats in the 34ft range with enough headroom have a flatter underwater body, they don´t sail upwind with waves as well as they pound much more.

Because they are lighter, beamier and flatter in the underbody the roll acceleration, very related to seasickness, is much worse. The P341 does 0´10 G´s compared to 0.15-0.20 G´s of boats with more headroom.

[IMG][/IMG]

A classic 40 ft is out of consideration because of marina and maintenance costs.

Why is just raising only 2" so difficult if well done? We´re in 2016!
You've done projects like this before, no doubt?

Sent from my SGP521 using Cruisers Sailing Forum mobile app
__________________
Reefmagnet is offline   Reply With Quote
Old 08-08-2016, 14:27   #5
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2014
Location: Astoria, NY
Boat: Sabre 38
Posts: 346
Re: Raising coachroof tutorial

Quote:
Originally Posted by blue-eyes View Post
Why is just raising only 2" so difficult if well done? We´re in 2016!
Chopping and channeling a roadster is also straight forward in theory, but requires a true craftsmen to pull off in practice.

Anything is possible with a boat if you have the money. To complete this project, do you really want to spend $40k (or Euros, as the case may be) when the boat only costs $40k? If you do, go have at it with an experienced boat yard! Or buy a different boat for the $40k.
__________________
Stephen

s/v Carpe Ventum
1983 Sabre 38
My Intro
fallingeggs is offline   Reply With Quote
Old 08-08-2016, 14:33   #6
Registered User

Join Date: Aug 2016
Location: San Sebastián (northern Spain)
Boat: Puma 341
Posts: 6
Re: Raising coachroof tutorial

Nope I haven´t.
I know a local profesional who works very well with polyester for canoeing, surfing etc and dinghys.
I don´t know if he´s gonna be prepared for a project like this. But I think in 2016 something has to be known about the polyester resistance (maybe epoxy too?).

Is the polyester used for the coachroof the same than the hull?
If the polyester thickness in the coachroof is increased a bit compared to now why should the coachroof resistance gonna be such a problem? Its just 2"....
__________________
blue-eyes is offline   Reply With Quote
Old 08-08-2016, 14:51   #7
Senior Cruiser
 
Sailmonkey's Avatar

Cruisers Forum Supporter

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 4,949
Re: Raising coachroof tutorial

Resistance?

It's not just raising the coach roof. It's bulkheads and other structure too. A metric crap ton of work. None of it is rocket science, but needs to be very carefully executed.


Sent from my iPhone using Cruisers Sailing Forum
__________________
Sailmonkey is offline   Reply With Quote
Old 08-08-2016, 14:56   #8
Registered User
 
Reefmagnet's Avatar

Join Date: May 2008
Location: puɐןsuǝǝnb 'ʎɐʞɔɐɯ
Boat: Nantucket Island 33
Posts: 2,678
Re: Raising coachroof tutorial

Quote:
Originally Posted by blue-eyes View Post
Nope I haven´t.
I know a local profesional who works very well with polyester for canoeing, surfing etc and dinghys.
I don´t know if he´s gonna be prepared for a project like this. But I think in 2016 something has to be known about the polyester resistance (maybe epoxy too?).

Is the polyester used for the deck the same than the hull?
If the polyester thickness in the deck is increased a bit compared to now why should the deck resistance gonna be such a problem? Its just 2"....

Epoxy or vinyl ester is arguably better for this type of job. You will change the aerodynamics and raise the COG. Design will minimize the former, and construction method the latter. If you're planning on raising the deck I'd suggest it's a total waste of time, effort and money. Maybe viable if you raise the deckhead, but even then...
__________________

__________________
Reefmagnet 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
Thru-mast Or Mounted On The Coachroof? carstenb Deck hardware: Rigging, Sails & Hoisting 27 11-11-2012 02:22
Compass on Steel Boat Coachroof idpnd Navigation 2 19-01-2011 07:34
Lighting Tutorial GordMay Electrical: Batteries, Generators & Solar 12 30-10-2005 13:25
Pactor Tutorial - Ham E-Mail GordMay Marine Electronics 0 10-07-2004 03:59


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 21:38.


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.