Cruisers Forum

  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 16-06-2016, 15:30   #106
Registered User
44'cruisingcat's Avatar

Join Date: Sep 2006
Posts: 9,398
Images: 69
Re: Lagoon 400 Bulkhead an issue?

Originally Posted by BigBeakie View Post
The best materials testing information I could find was by the Swedish Navy which were doing meticulous panel testing for their upcoming high speed patrol boats. They tested all the core materials, e-glass vs s-glass, and the various resin formulations. They did it with both vacuum bagging wet layup and VIP.

Then they subjected the panels to various torture tests including maximum impact drop testing and repeated lower intensity cyclic loads simulating wave strikes.

The clear winner was Corecell M with epoxy resin infusion giving a 1:1 resin to glass weight ratio. The epoxy was, from memory, SP Systems which had a high "toughness" characteristic (no micro-cracking). We also tested West Systems vs SP and found the same thing.

Balsa core was down the list and had inner skin delamination, because it's compression modulus is so high. The force gets transmitted through the balsa to the inner skin, particularly where there are longitudinal members or bulkheads that restrict the panel being able to flex. So in this case, more is not better.

There is a big move in the high performance watercraft field to be using the Diab HM or Corecell M for this resistance to delamination, check it out yourself.
For a high speed patrol boat, impact resistance would be a high priority. A softer core, something like rubber would be great for impact resistance.

But on sailing cat's you're looking for structural rigidity. Stiffness.
"You CANNOT be serious!"

John McEnroe
44'cruisingcat is offline   Reply With Quote

head, lagoon, lagoon 400

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
400: Lagoon 400 or 400 S2 Big Joe Bob Lagoon Catamarans 20 11-01-2015 13:12
For Sale: Brand New NAIS-400 AIS Transceiver - Class B & NSPL-400 mcerdos Classifieds Archive 2 15-12-2014 16:47

Advertise Here

All times are GMT -7. The time now is 19:01.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.