Light Plywood Structures

We were pretty happy when our PDRacer hulls came out around 55lbs before epoxy and varnish/paint and fittings were added. About 7.5lbs per foot.

Straight out of the box and using a relatively heavy hardwood construction ply, and pine framing.

There is nothing secret about these types of structures. If you take a cardboard box and open the top it is very floppy - not a good structure at all. But if it is closed up and taped along all the edges it becomes hugely rigid.