[Robotaleem]

Originally Posted by MichaelS

Try some styrofoam or even a piece of wire with two heavy pieces of cardstock on either side. You can also stuff them carefully with old paper napkins. Over stuff them a bit and then gently form them to airfoil shape.

You can also go overkill like I've done on some larger builds and research the type of airfoil a craft uses and then hotwire cut it out of insulation styrofoam. It works brilliantly.