I am going to make an aeroplane with airfoil. Which Density, thickness of Thermocol will work for airfoil.I am beginner.
If you can suggest then please give your suggestion.

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I use the normal hd thermocol which is a bit denser than the refrigerator thermocol. I get it from a thermocol factory for 150 rs. There are thermocol factories in every state and probably in ever district.. U can use the refrigerator thermocol too. But cover it with packing tape.