i'm in the process of building a chesapeake 17', and am at the stage of
making the hatch covers. a friend of mine made the same boat, and when it
came to making the hatch covers, he had a lot of problems making them keep
their shape. the plans call for a single layer of 4mm plywood, curved/bent
to fit across 2-3 (depending on whethere fore or aft) "ribs" that are cut in
a parabolic shape. he ended up gluing 2 layers of 4mm together and rigging
up an aparatus that included a hydraulic car jack and a ceiling beam to keep
pressure on them!
any ideas regarding how to "encourage" the covers to keep their bent shape?