What is a one sheet boat?
A boat made of just a single standard sheet of plywood (The "standard" standard, 48" by 96", or 122 cm by 244 cm. There are other standards too...)
If the transoms, sides or any other parts of the hull are made of something else, the boat is not a one sheet boat, but something else.
Chine logs, rubrails, internal frames, butt blocks, seats etc. may be made of whatever You like, but not the actual hull enclosure.
Basic one sheet boat design criteria:
- make it carry as much load as possible
- make it look like a boat
The load carrying capacity is connected to the maximum displacement of the boat (displacement just before swamping), or the maximum enclosed volume, if You like. So make the thing as big as possible.
But what makes a boat look like a boat?
If You make it:
- longer than it's wide
- wider than it's deep
- tapered in at least one end, in at least one plane (horisontal or vertical)
- throw it into water
- and it floats
then most people will probably call it a boat.