My friend wants to change his 7m MKIII for a MKIV.
I will ask him what he knows about it.
I know that NP has again severely reduced the aspect ratio of their sails.
Just checked on their web site.
For a 7m sail, the MKIII has a luff of 462 while the MKIV has a luff of 448. That's 14 cm difference !
The MKIV needs a 430 mast while the MKIII can be rigged on a 460 or 430 mast.
This could perhaps explain the problem. Lower aspect ratio will always induce higher mast bend curves and hence more pressure on the mast.
Again, I'm going to inform on the Dutch and Belgian surfforum. See what they know.
IS87 / IS101 / RRD114 / US147
Last edited by BelSkorpio; 14th April 2012 at 08:19 AM.