What are the wings bonded with? Will they safely withstand the internal
temperatures they'll see in bare aluminum finish?


We didn't talk specifics when I was at the hangar, other than - when the ION
was engineered (by people who know this stuff), that was very much factored
in.

The rest of the plane is composite, just the (removable) wings are aluminum.
Oh, and the rudder(s) and elevator, they're aluminum too.

http://www.ionaircraft.com/Toucan.jpg
"Toucan" needs to be updated to show three (green) aluminum control surfaces
on the empennage.


Montblack