>>I think I read a post a while ago about the positioning of a mast in a
>>mast sleeve. Is it wise to put the same side of the mast in compression
>>or tension all the time? For example, if the mast is not positioned the
>>same way all the time in the sleeve, a specific side of the mast will be
>>in compression one time and then perhaps in tension the next. Would it
>>better to make sure the one side recieves compression all the time? Any
>On the other hand, I hear that many top sailors always rig a sail according
>to the 'natural' curve of the mast - the small amount of curve from dead
>straight that any mast will have.
I'm no techno wizard but have been using carbon masts for about 12
years now and have never had a failure of any kind.
I have a advanced composites engineering book and what little I can
understand leads me to believe that the aforementioned "pros" may be
right and this agrees completely with my experience.
If you get a new mast, try to match the joint so it fits with no gaps
at the vetical parting line of the joint (ie twist it around until it
has the least possible gap). Then mark the top in relation to the
bottom with a paint marker or tape.
Then roll the mast on a smooth surface or sight down the mast while
rolling it on the tip. If it has a definite "high side" mark this as
the front and always put it toward the front of the rig.
My north Xcellerators have serial number stickers on the top and
bottom and when aligned I always put this to the front.
My un high tech analysis is that if you bent the mast in the same
direction all the time you will eliminate (to the extent possible)
something called "interlaminar stress" which means that adjacent
layers of composite fibers are not forced one way today and the
opposite way tomorrw which could eventually damage the interlaminar
bond and weaken the mast.
It works for me, the pros seem to agree, and the textbook suggests
that it's a good idea.
Go for it!
F2 Boards;North Sails/Rigs;True Ames/Rainbow; SpeedTech .