Image Discuss: Team 229 - Robot 2

[JVN]

Originally posted by Tytus Gerrish
What is that material?

The wings are made from a 30:1 expansion foam. This is a binary compound, i.e. you mix the two chemicals, and it expands out, really fast.

And yes... the foam is cyanide based.
This means it releases a form of cyanide gas as it expands, and the foam itself remains.... mildy toxic.

We made the wings by building a wooden frame in the shape we wanted. We then poured the foam around a metal frame which would serve as the interior of the wing.

After the pour, we sanded/cut the wing down to shape. We then covered the wing in 1/32" lexan. This lexan protected the foam from most damage. By the time we were finished, the wings were pretty much indestructable. (ask anyone who saw them... we demonstrated their robustness by hitting them with a hammer).

The foam is good stuff.