[timberwolf]

Looks Great

I agree and I am very envious. My boat is on the hard and covered for winter -- no sailing until May next year.

 

/Martin

[timberwolf]

The fibers are not the limiting factor here as far as I understand. What starts to happen at 0.3%, according to my literature, is the resin matrix starting to de-attach from fibers crossing the load path. John Shuttleworth does also mention the 0.3% limit but does not explain what happens in the same depth and only mentions onset of micro-cracking of the laminate.

 

Last year I did a little reverse engineering of the bow and twist limits we use for printed circuit boards (built from glass-epoxy prepreg) and it turned out those limits correlate with the 0.3% strain limit of the aerospace industry. This is perhaps a coincidence but still...

 

Any up-dates on this crucial aspect of yacht design are more than welcome.

 

/Martin

[timberwolf]

9 tonnes is the (theoretical) ultimate breaking load, I assume.

In aerospace laminates designed for a decent fatigue life strain is kept below 0.3%. (from old literature but still)

What do you have at 9/2 tonnes?

 

/Martin

[timberwolf]

all you have to do is paint them and you will have a mean as CAT .......[attachment=0]Alt_CC20110113m0571.jpg[/attachment]

Nice!

When we built our boats we were so eager to go sailing we decided proper long boarding and all that jazz could wait. 25 years later it has still not happened

 

/Martin (-9 C so no sailing in a while)

[timberwolf]

[attachment=1]DSC07110.JPG[/attachment]

I'd like to do this to my hulls some day. I can't do much about the outcome, the boat is after all 25 years old, but it would be fun to know.

 

/Martin