Foamboard Armin style wing.
This wing was built for a 40" version of the popular Specter V2 by IBCrazy. Alex has done wonderful things with this plane and it is a very capable FPV aircraft. If you have any questions or would like to know more about the plane and it's design, you can find a great thread in the fpvlabs forum.
http://fpvlab.com/forums/showthread.php?2769-Specter-V2-My-best-FPV-plane-yet&highlight=specter
The wing design using the foamboard technique is by Experimental Airlines. You can research more on his work on his youtube channel.
http://www.youtube.com/user/ExperimentalAirlines
I've also got a few write-ups on this (including dimension for this wing) and other planes on Flitetest.com.
