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> 2 questions:
> 1. S&G kayaks are made of 4mm plywood (usually). strippers are made of
> wood strips that are thicker than 4mm. so doesn't it makes strippers
> inherently heavier than S&G ?
Not necessarily. In Ted Moore's KayakCraft, he lists the weight of a 12" x 12" test panel of 4mm Okoume with 4 oz. of glass on one side as weighing 10.3 oz. For a 12" x 12" panel of 1/4" cedar with 2 layers of 4 oz. glass, it's 10.9 oz. These layups are both roughly equivalent for lighter-duty boats. S&G boats with hard chines have a bit more surface area, so the weights of S&G and strip-built boats of a very similar design should be about the same.
> 2. doe's it float ? a plate of 4mm plywood, glassed (+ epoxy) on both
> sides.
> in fresh water ? salt water ?
A 12" x 12" piece of 4mm with a layer of glass (we'll assume is .5mm thick) weighs 10.3 oz. This piece has a volume of 25.335 in^3. Its weight is 0.644 lb. An equivalent volume of fresh water would weigh 0.915 lb. It floats with 0.271 lb of reserve buoyancy. Salt water is about 3% denser, so it would displace a weight of about 0.942 lbs.
Shawn
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Guillemot Kayak - High
Performance Wooden Sea Kayak Designs
