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Old 09-01-2013
Brent Swain Brent Swain is offline
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Re: Pros and cons of steel sailboats

Quote:
Originally Posted by outbound View Post
Would seem this line of thinking would also apply to other materials not just steel. Even a glass boat when hit in a manner that the force was oblique to the plane of the hull would be stronger. It would be weakest if struck perpendicular to the hull. Increased curvature would also decrease likelihood of "oilcanning". Would think this improvement would be more likely to occur in a fully developed hull with compound curves than a chined hull or hull with simple curves. Would think having a fine bow would likely also increase strength in context of impact . Speaks well for the Sliver.
Still remember earlier post about hitting the corner of a container at hull speed. That remains my nightmare so think having a forward collusion bulkhead makes sense.
Yes, more compound curves definitely make any hull stronger, but hard chine steel hulks are so overstrength that it would not be worth the huge increase in time and expense for something so irrelevant. Most round bilged steel hulls use a lot of filler , eliminating one of the advantages of a steel hull in the first place , care free cruising. You don't want to chip the bondo.
Yes, fibreglass hulls benefit greatly by their compound curves, and flat surfaces on fibreglass hulls, without additional stiffening, should be viewed with suspicion.
Any designer working in a heavy material should, before adding unnecessary parts, look for some other part or feature which will be serving the same function.
Few designers have anything to offer, to deal with biggest hurdles most wanna be cruises face , time and money.
In fact, all too often, their response to such issues is often ridicule and obstructionist disinformation. Unless one has unlimited funds, they would be wise to steer clear of such designers, and their "advice".
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Brent Swain, Boat designer, Builder, and author of "Origami Metal Boatbuilding"