Build Log for Zackspeed Flying Wing Glider

This is the Build Log for the Zackspeed Flying Wing glider.

I bought the wing cores off Ebay, they are made by this company, http://epp-modelle.de/ .  It basically came as two wing half made of white epp foam.  

Altough optional on this wing, I have decided to install carbon fibre tubes to reinforce the wing. The tubes are 5x3 carbon tubes, light and rigid enough to hold the shape, but with enough flexibility to take hard landing and combat.

The where installed like so, the line in the middle are for the CG. also note the battery compartment

The equipment I have installed in this are:

FRSKY V8R4-II
2 x Goteck HKS-9650 Servos

The servos and the receiver were installed on the top of the wing , countersunk in the foam and then covered with tape.

 Using spray on glue and colored duct tape, the wing was reinforced as suggested in the instructions, using the shown pattern. The difference in torsional rigidity is quite large. The elevons were cuts from cardboard back foamboard 3mm thickness, and then taped on, I used credit card control horns.

The all up weight ended up being 650 grama with 80 grams of ballast in the front After the maiden flight I can report that its a very easy wing to fly, tracks very well. It is also quite fast. During the flight the wing was just on the limit of the CG, being a little tail heavy, but the amount of altitude it can gather is very good. Overall quite a good wing