>>Re: why doesn't NOLIMITZ want people to jump with their Carbon Slalom mast.
>> Well, for starters, its not a real strong mast, relative to masts
>> rated for surf. NOLIMITZ also had a carbon wave mast, which I may
>> well get. That mast was significantly more beafy and weighed a lot
>Fiberspar's carbon masts are pretty awesome these days. I have
>friends in Florida who have been wave sailing the slalom masts for a
>few years now, and I've had real good luck with their wave masts,
>including more than a few days of 10-15' faces on the Oregon coast.
>> A stiff mast will more likely break should you land badly (like on
>> the mast). A flexy mast will more likely flex a whole lot instead.
>> The stiff race/ slalom masts have a much narrower range of flexing
>> before they will break.
>The force of a crash landing, either from boom torque, or from head
>torque, or from the mast hitting the front of the board is likely to
>be as high as the force from jumping. However, Scott is correct in
this is a very good point. even high speed runs through chop and wiping
out badly (without jumping) can cause breakage when the mast merely hits
>> Even if you land OK the impact will cause a big deflection-type load on
>> the mast. Also, driving around in 1-2 foot chop would put a lot of
>> continual load/unload deflections on the mast.
what I meant by this was that the area from the boom connection to the tip
of the mast gets flexed and unflexed a lot. this happens from wind gusts
and from bouncing around on chop for example. this constant flexing is a
cause of deterioration in structural integrity. on thick and easily flexed
wave masts its less of a problem.
pumping the sail puts similar loads on the mast. I've seen R. Naish pump
a sail with such power that he broke the mast (I presume it to have been
a carbon race mast). the area of break was between the mast tip and boom.
>Use a mast protector with any carbon or aluminum mast, and if it can't
>deal with jumping in 1-2 foot chop, sell it to a pole vaulter.
this is without a doubt the best advice so far within this thread. why???
because last saturday my brand new mast (used for two short sessions)
broke. I rigged a fairly large sail (6.8). but was within the manufacturers
limits on extension, etc. the mast spontaneously exploded while rigged but
not in use. this *was* a two piece mast. the area of break was the bottom
section of the top piece where the joint is created. the top section split
a full 18 inches. I am *not* a happy camper. it will be interesting to
see how the dealer handles my problem (I am asserting that the thing is/was
defective). I will, without a doubt, NEVER buy another two piece mast again.
Ditto for light weight carbon. I'm thinking of staying with beefy one piece
carbon wave masts from now on.
I'm now referring to my ex-mast as the LIMITZ...