Originally Posted by chala
is a good heat conductor and dissipates it well. The submerged surface of a boat sinks the heat well. By comparison it is nearly 12 degree C colder than plywood
You asked "why would I not want a metal boat if I wanted to lie naked on deck".
Answer: When the surface is warmer or colder than body temperature, the large thermal mass of metal does not allow it match your body's temperature. With wood or cored fiberglass
, you sit on a cold spot and before long your body heat warms the surface and it becomes comfortable. Think about the expression "I warmed up your chair for you". As you stated, metal is a great heat conductor and it quickly conducts the heat away from you. Or keeps on burning you if hot.
Also, Metal is hard with very little "give". Walk on your knees on metal and it hurts.
Don't get me wrong, I am very happy with my boat material (aluminum). I was just pointing out that it is not the best at every thing.