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Old 03-10-2010, 10:43 AM
Southbound Southbound is offline
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Join Date: Mar 2010
Posts: 5
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Ian,

I have more information I can share if anyone with some expertise cares to assist and discuss.

I have a sistership IMS certificate. I have information on the original sailplan as designed by Alden Yachts. I have had a spar manufacturer look at data and come back with a sail plan with their moments of inertia and section weight of 4.8 lb/ft.

I own a nice new mast that I can install. It will fit desired sailplan with minor modification. However as I stated it is a heavier by just over 1lb/ft than designed by aforementioned spar manufacturer. The design that I recieved was lighter than original (a good thing). The original spar was closer to the 6lb/ft.

The boat has a good stiff feel as it is but as mentioned underpowered in light air and actually suffers from Lee-helm. -not real common on CCA era boats in my experience. Granted part of that is because I think the main I had made was cut too flat and too much draft forward. -its dacron so that will change

Ideally a nice carbon fiber mast would be great. -not in the current budget.

So really I am wondering how much noticable weight could be removed aloft by sythetic rigging and should I be scared to add the weight of this replacement spar aloft.

Thanks,
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Old 03-13-2010, 07:06 AM
Brian Duff Brian Duff is offline
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Join Date: Sep 2005
Location: Annapolis
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Default weight aloft

Now that I am safely removed from any expectation to know what I am talking about with boats, I am happy to throw a thought your way. (not a true goon rigger any more, just a broker)

Shifting weight aloft on your boat by 50lbs will make no damn difference at all.. You may notice if you are really really perceptive some difference in the pitching motion, heeling angle, or otherwise on the boat - but I bet not.

40' and 20000 is not particularly heavy, but I still feel that 50lbs used up at 1/lb a foot doesn't matter. You could remove something like 50lbs by changing to dyneema rigging if you are really concerned.

Tell us a lot more about the boat, a lot more, and your NAME - if you really want some help deciding on what to do.

Also, you might be so kind as to consider changing your username here, but that's just my vanity asking...
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