It's mostly balsa wood with birch ply for bulkheads and basswood spars.
Here's a closeup of the tail feathers - stick construction for light weight..
Wing tip. There's actually a similarity to teardrops here - airfoil shaped ribs connected by spars with curved sheeting. The sheeting stiffens it up just like it does on a tear!
Here is the motor - a brushless outrunner capable of 750 watts (about one horsepower)! Outrunners have a fixed armature, and the motor case rotates along with the propeller, which makes lots of torque without a gearbox.
I'll cover the plane with Monokote, an iron-on plastic film. Finished weight should be about 3 1/2 lbs. The flight battery is a 3600mah lithium polymer type. Current draw will be around 35 amps! I love R/C! I've been flying them since 1972! I thought some of you might be interested in seeing a very different kind of woodworking!
Sam