Balsa cored hulls
#22
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I'm not saying because it's in my boat it has to be the best, I can say the hull side and deck integrity is impressive. I have this thing about smacking the side of hull's at boat shows and can notice interesting differences in builds.
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#24
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So why "Checker Board" effect? I know this stuff is manufactured or should I say harvested,cut and put back together guessing for construction purpose it conforms to shape easier?
I'm not saying because it's in my boat it has to be the best, I can say the hull side and deck integrity is impressive. I have this thing about smacking the side of hull's at boat shows and can notice interesting differences in builds.
I'm not saying because it's in my boat it has to be the best, I can say the hull side and deck integrity is impressive. I have this thing about smacking the side of hull's at boat shows and can notice interesting differences in builds.
Baltek is truly impressive structurally. It provides a high rigidity to weight ratio. It used to be boats like Cigarette were laid up with lots and lots of fiberglass layers to get the strength and rigidity. Composite core construction came from the areospace industry. The theory is best explained in an example- Take two pieces of steel... they're both the same length and weight. One is a solid bar, one is an "I" beam. The bar will be equally rigid in all directions of force whereas the "I" beam will be much stronger in the one direction it's intended to be loaded in, the flange face. On an equal-strength basis, the "I" beam will be substantially lighter. Coring a composite provides the same effect. The top and bottom skins are the flanges of the "I" beam and the core is that center rib.
#25
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Hatteras??? http://www.yachtsurvey.com/boatrevie...terasINTRO.htm
Viking also has no problem with Balsa.
I thought Browards were Aluminium.
Bertram’s problems were from the engineering and installation.
#26
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No it does not absorb water in any measurable amount.
It has the highest Peel strength of any cores I have used.
The cell structure can be deformed 60-80% without damage.
It is PVC Foam and a great one at that.
BUT there is a thermal issue that one should be aware of like DO not use in a Dark deck in the sub tropic summer sun.
However I have built race boats from it in the ME where it gets to a comfortable 135 F in July and august.
And it is not cheap.
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Best stuff I ever worked with
I've worked with Airex, Klegcell, Baltek and lots of other core materials. But my hands down favorite is Nida Core. Its light weight, doesn't rot, good tensile strength and good stiffness. Only down side is you have to be real good at your bonding skills. Your laminates will delaminate from it if you do a trashy job.
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I've worked with Airex, Klegcell, Baltek and lots of other core materials. But my hands down favorite is Nida Core. Its light weight, doesn't rot, good tensile strength and good stiffness. Only down side is you have to be real good at your bonding skills. Your laminates will delaminate from it if you do a trashy job.
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If your covering a concave surface the scrim goes outward towards you. If its a convex surface the scrim goes inward away from you.
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Marginmn
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08-18-2004 03:21 PM