Light-weight plastic panel

I think you are out of luck. Even balsa would be heavier than that.

Sarar , it is better you put your correction on the same post


sarar (Mechanical) Apr 2, 2003
I have a correction for my last thread, in the design will be a honeycomb shape sandwiched between to flat panels, so I guess what I am looking for is a material with a high strength-to-weight ratio and where I could find information about this type of material.

Pardal

sarar

maybe you can look for a polycarbonate alveolar .

I know of them on about 10 mm thick .

I do not know is there is 1 " thick


Pardal

Try one of the structural foam panel manufacturers that sell laminated panels used in yacht hull construction

One is
More information on this type of composite on
Carol

Have you checked into aerospace materials?

We use panels made by Nordam and the 1" thick fiberglass skin honeycomb panels weigh .64 lb / ft^2 and aluminum skinned 1" thick is 1.14 lb / ft^2...