Plastic for model rotor blade use

[jplot]

I am wondering if anyone out there knows of the availability of plastic sheeting that could be used as the material for model rotor blades. I am thinking of an ideal dimension of 3.5 inches wide by 24 inches long by ¼ inch thick. Of course it would be ideal if they were at least roughly shaped into the form of an asymmetrical airfoil but even just slabs of ¼ plastic could be useful.

 

[insideman]

Most sheet plastics will be too heavy. Look for materials that are foamed.