Nacra 6.0 cross wire under trampoline - purpose?

Sounds like a trick question designed to flush out the smarta**es.

So, here goes :

This cable does provides cross-platform support, in case of a collision. It is asymmetrical because it is only intended to aid in collisions while on port tack, which since they will be your fault, will entail larger $$ outlay. For collisions while on starboard tack, damage will usually be responsibility of other party, so there is no need to carry the extra weight of this kind of cable.

gotta give you credit on that one...you really put some thought into that! ...but seriously...what's this thing for? I'm an enginerd and It's killing me.

Did the previous owner add it for structural and/or alignment reasons? I have nothing like this on my 6.0 NA. How much tension is in the cable? Enough to cause significant torque at the hull and cross beam joints? Torque translates to stress, not a good thing.

I am disappointed that an enginerd would not include a detailed freebody diagram wth all the important dimensions, forces and couples (we'll pass on material properties this time). Tsk Tsk. Your old statics prof would not be happy about this.

I have nothing like this on mine an I can't figure the purpose of it.

Could it have something to do with righting the boat when capsized? (since it is under the tramp) does it disconnect? used to hook on to when surfing off the back? was the previous owner a fisherman and used it to snag his lobster pots? the other one broke off and was never replaced? If Todd does not know what this cable is used for then it is extra. Ok I admit I am a dumb a&^.

Apparently I'm the dumb a$*! After a quick glance the other day it looked like it was incorporated into the hull locators and I assumed it was factory. It's not very tight but you definitely feel it if you stand on the trampoline over it (that's how I found it). It has a turnbuckle just like the diamond wires. I'll take another look at it tonight and maybe post some pics. Whatever it is, somebody took some time to construct it. The mystery continues.... Perhaps it's the only thread holding the boat together! (like I said, I just bought it)

Is this a brand new boat? If not, could this wire have been installed to correct a misalignment in the hulls?

"If Todd does not know what this cable is used for then it is extra."

Todd here.

I liked the one about the lobster traps.

Did you ask the previous owner? I hope it's not really there for a reason of boat stability.

As others have also posted, it's not something that comes with the boat, or even a common add-on.

My vote is ask who put it there.

Todd Bouton

n6.0na

+sq top and spin/snuffer

#111

Just an idea, but I ran into a guy one time that had "what appears" to be what you have. He had installed that wire because his platform was "racked". Might want to check for square. Just a suggestion.

Dave

I've been trying to call the person I bought it from was reportedly moving to Alaska in a hurry (that's why the price was so right - no worries - he had the original bill of sale!). I haven't had a chance to look at it again but I think the 'racked' assembly is the leading theory I have now. However, I thought the rear beam brackets on the beams were adjustable so you could take out any misalignment there.

With the mystery device in place, measure your boat from corner to opposite corner. Use a definitive set of points such as starboard bow foil tang to port rudder pintle and vice versa. Are those lengths equal? Now remove (de-tension) the mystery device and repeat. Are the cross measurments still equal? If not, you obviously have an alignment issue that is being rectified by the mystery device.