• Home
  • Class
    • Membership Application
    • Board of Governors
    • By-laws, Rules, Specifications
    • History
    • Contact Us!
  • Calendar
  • Fleets
    • Directory
    • Districts
    • Teams
  • Forum
  • Info
    • Official Specifications
    • PHRF Rating
    • J/30 @ J/Boats.com
    • Why Own a J/30?
    • J/30 Drawings and Files
    • Diesel Engine Maintenance
    • Articles of Interest
      • J/30 Rigging Information
      • J/30 Spreader Brackets
      • J/30 Rig Tuning
      • J/30 Crew Assignments
      • Cruising Your Racing J/30
      • J/30 Trailering
      • Building a Parking Sail
      • Barient Winch Information
      • Painting Your J/30
      • Shaft Log Replacement
      • Installing a Windward-Sheeting Traveler
      • Bonnie’s Adventures Buying Bearaway
  • Market
    • For Sale
    • Wanted
    • Equipment Suppliers
    • J/30 Apparel
    • J/30 Online Store
  • Photos
  • Regatta
    • National Championship History
Class
Association
Discussions on everything about the J/30 Sailboat!
With your one stop source
The J/30 Marketplace

Donate to the J/30 Class
2012 J/30
North Americans

October 18-21
New Orleans YC
New Orleans YC
2012 J/30 SNE
Regionals

July 21-22
Newport YC
Newport YC
2012 Cedar Point OD
June 2-3
Cedar Point YC
Cedar Point YC
Active Topics
Active Posts
Unanswered Posts
Search
Advanced
You are not logged in. [Log In] J/30 Class Association » Forums » J/30 Forum » The Boat, Sails and Equipment » Core replacement
Register User    Forum List        User List     Calendar     Active Topics     Search     FAQ
Search

May
M Tu W Th F Sa Su
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31
Today's Birthdays
Bob Rude
Newest Members
Benjamin, prezbolt, VeeJayTheKid, nobrakes, Matchracer
595 Registered Users
J/30 Social Network
J/30 Sailing

j30news

J/30 News YouTube Channel
(Views)Popular Topics
Dacron Main 97922
Northwest one-design 55235
Other J/30 Sailboats For Sale 29403
Comment Here - Draft Potential Rule Changes for 2009 28773
2010 Class Registration & Dues 28138
Rhapsody Transom Re-core and Other Areas Too 27245
J30.org Web Page 20724
2009 J/30 North Americans at Cedar Point YC 19512
J/30 Midwinter and Mardi Gras Regatta 14956
Southern Straits 13273
Forum Stats
595 Members
27 Forums
2619 Topics
13367 Posts

Max Online: 42 @ 05/03/11 10:31 AM
Topic Options
#3583 - 08/30/07 06:45 PM Core replacement
Phantom364 Offline
Senior Member

Registered: 10/18/08
Posts: 127
Loc: Iowa City IA
The boat has to come out of the water soon, so it's time to start thinking about rebuilding a few areas of the core. The biggest spot is midship and about 3x5. I plan on rebuilding this from the inside. It would seem to be easier than trying to match the exterior hull contours. The next major spot is the transom, which I'll do similar to what I have seen on this forum.
1) has anyone remove the interior wood work? what's involved?
2)Does anyone have a good source for balsa wood?
thanks
john
_________________________
Phantom364
Phantom364.blogspot.com

Top
#3584 - 08/31/07 11:49 AM Re: Core replacement
R II Offline
Senior Member

Registered: 03/18/05
Posts: 111
Loc: Bellevue, WA, USA
[1) has anyone remove the interior wood work? what's involved?
2)Does anyone have a good source for balsa wood?[/B][/QUOTE]

Check out the following links and perhaps contact Rich at 6 Degrees Software and Consulting, Inc. http://www.6degrees.com
mailto:rich@6degrees.com

http://j30.us/ubbthreads/ubbthreads.php/topics/5934/Dewatering_Aft_Bilge_Need_Advi.html
http://www.6degrees.com/j30/underthefloor/J30%20Rebuild/Inner%20Laminate.html

AC
#448 Rauzer II
_________________________
AC

Top
#3585 - 09/04/07 12:18 PM Re: Core replacement
sjans Offline
Senior Member

Registered: 07/13/07
Posts: 75
Loc: Milford, CT
http://www.marine.com/product_info.php/c...ba25b3d2a21d6f4

this was 3/4" balsa used for the cabin top.
I don't know the thickness of the hull balsa.
I am curious to see your end-results...

Top
#3586 - 09/04/07 05:00 PM Re: Core replacement
David Erwin Offline
Class Co-President

Registered: 07/11/04
Posts: 625
Loc: New Orleans, LA, USA
Also reference this link:
http://j30.us/ubbthreads/ubbthreads.php/topics/6404/Core_Damage_Tip.htm

Top
#3587 - 09/28/07 08:37 AM Re: Core replacement
rattleandhum Offline
Senior Member

Registered: 09/21/07
Posts: 42
Loc: Halifax, Nova Scotia, Canada
Hello Everyone,
I'm new to this site and the new owner of Hull #124. This boat needed a lot of work and unlike the last boat I owned, a Bombardier 7.6, I thought I would take pictures of the rebuild (the work is being completed by myself and help from the crew).

If you are interested in my progress then please view my site: http://sailrattleandhum.blogspot.com/

Please Note:
I have no commentary on this site, I'm more interested in rebuilding the boat then keeping a blog up to date. If you have any questions I'll do my best to answer them in short order.


Thanks
_________________________
http://sailrattleandhum.blogspot.com

Top
#3588 - 09/28/07 05:01 PM Re: Core replacement
David Erwin Offline
Class Co-President

Registered: 07/11/04
Posts: 625
Loc: New Orleans, LA, USA
Wow thanks for sharing.

I have some to the conclusion that blisters come from two sources:

(1) lack of an epoxy bas barrier system

and

(2) water from up above

Did you ave have any luck matching the deck with factory based anti-skid look?

Top
#3589 - 10/01/07 08:46 AM Re: Core replacement
rattleandhum Offline
Senior Member

Registered: 09/21/07
Posts: 42
Loc: Halifax, Nova Scotia, Canada
Because I'm rebuilding the entire deck I won't be trying to reproduce the factory non-skid. I had great success with the process I used on the last boat and intend to use it again.

Quick overview of the steps:
1) Using a quality paint scrapper, scrap off the non-skid.
2) Sanded down the "smooth surfaces" with a board sander at 80 grit.
3) Sand down the "non-skid" surface with 80 grit.
4) Spray Awlgrip 545 primer to appropriate coverage thinkness (after deck has been properly cleaned).
5) Sand down the primed surface at 220 grit.
6) Spray Awlgrip on "smooth surfaces".
7) Tape off/cover "smooth surfaces".
8) Mix awlgrip (as directed) with flattening agent, then mix in Colloidal Silica until the paint is as thick as peanut butter.
9) Spread the mixture onto the non-skid area and roll it with a medium nap roller.
10) Let dry and remove the tape.

That's it and (in my opinion) you will get a beautiful, long lasting result. It will look like the non-skid on C&Cs as well the non-skid used on J120s.

There are more details on how to use awlgrip at: http://www.awlgrip.com/awlgrip_pages/application_guide_above_water.htm

A website on how to create the non-skid that I have described: http://www.westsystem.com/ewmag/20/Fiberglass_deck.html

Thanks
_________________________
http://sailrattleandhum.blogspot.com

Top
#3590 - 10/10/07 03:05 PM Re: Core replacement
JBro Offline
Senior Member

Registered: 04/13/07
Posts: 91
Loc: Bainbridge Island, WA
Great stuff - thanks for sharing.

I can also attest that the real trick is using a LOT of flattening agent. My Dad had his Cal completely repainted with Awlgrip by a yard (Fleet Marine in Pt. Townsend, WA - great yard, people, and product, BTW) and the trick, as explained to me, is to use a ton of flattening agent. It will help give the nonskid a "velvety" feel vs. a rough sandpaper feel.

Nice work RattleandHum. Inspiring!

- Jeff
J/30 #426
_________________________
- Jeff
J/30 #426 - Watusi

Top
#3591 - 10/24/07 01:13 PM Re: Core replacement
rattleandhum Offline
Senior Member

Registered: 09/21/07
Posts: 42
Loc: Halifax, Nova Scotia, Canada
For those of you following the rebuild of Rattle and Hum I have updated the blog as of today.
http://sailrattleandhum.blogspot.com

Thanks

Jason Penney
_________________________
http://sailrattleandhum.blogspot.com

Top
Previous Topic
View All Topics Index
Next Topic

Tweet

Preview

Moderator:  David Erwin 
Print Topic
Switch to Threaded Mode
View profile
Send a PM
View homepage
Add to your Watched Users
View posts
View profile
Send a PM
Add to your Watched Users
View posts
View profile
Send a PM
Add to your Watched Users
View posts
View profile
Send a PM
View homepage
Add to your Watched Users
View posts
View profile
Send a PM
View homepage
Add to your Watched Users
View posts
View profile
Send a PM
View homepage
Add to your Watched Users
View posts
View profile
Send a PM
View homepage
Add to your Watched Users
View posts
View profile
Send a PM
Add to your Watched Users
View posts
View profile
Send a PM
View homepage
Add to your Watched Users
View posts
Who's Online
0 registered (), 10 Guests and 3 Spiders online.
Key: Admin, Global Mod, Mod
Photos
Brushing up on single handed J30 spin operation
Wrapping up a 30 week winter season.
X48 vs J30
Running the spin halyard
What about adding an Opti warm up race at NA???
Recent Posts
Minutes: 10 May 2012 BOG Meeting
by Rhapsody #348
05/21/12 09:34 PM
DSC, Checking the Antenna, Mayday button
by Cap'n Vic
05/21/12 08:54 AM
Double 150 cleats for Spin Halyard
by Cap'n Vic
05/18/12 08:11 PM
Carbon Spinnaker Poles
by Cap'n Vic
05/18/12 08:05 PM
Prop-Speed works in our harbor
by JeffSmithNJphoto
05/18/12 07:22 AM
Grease Rudder Pintles?
by JeffSmithNJphoto
05/18/12 07:08 AM
Alison Kent - Team Rafiki Promote Sailing, J/30s and NAs on NPR
by David Erwin
05/18/12 12:36 AM
quick main haylard recomendation
by Cap'n Vic
05/17/12 08:21 PM
Parts Available from 1979 J/30 in Chicago
by Alan Veenstra
05/17/12 10:56 AM
Yanmar 2QM Engine Mounts
by CAN106
05/16/12 04:19 PM
Board Rules · Mark all read
Contact Us · J/30 Class Association · Top

Powered by UBB.threads™ 7.5.6p1