Foamboard W "Stingray" Wing with Kfm2 airfoil

The total width of the jig should be: 21" here is the top view diagram:

If you don't want to make this jig, these are the correct angles for the wings and the w section:

I made the W wing out of one sheet of foamboard 32" x 40"

Tip: Do not make the cut for the tail yet, it's better to do it after all the bends are done.

After the 50% score cut is made, open the gap as much as you can with a BBQ skewer to make the bends easy

This is how it looks after the two upper score cuts and the lower middle score cut, it's not glued yet.

You have to hot glue the middle score cut first pressing against the jig to get the proper angles, then you can hot glue the wings score cuts:

Afterwards you have to cut the Kfm2 upper parts of the wings, please extend like 1/4" on each side to be able to make a 45 degree bevel cut so it will fit nicely into the body of the plane:

This is how it will be after it's glued:

Now it's time to cut the slot for the tail:

And glue the tail in place, just be sure is straight, and also reinforce it with hot glue in the lower part:

At this point you can also make the score cuts of the elevons and the holes for the 9 gram servos as marked.

Then you can glue the firewall and the landing gear supports (I use gorilla glue for this parts instead of hot glue because it's stronger).

 After painting:

some lines applied.

And finally installing all the elctronics and components:

Here is the image of the landing gear:

This is the placement of the battery:

Well I hope you enjoy this model as much as I have done (building and flying), I can tell you one thing about this airplane, is one of the coolest and more enjoyable planes I have ever flown. My son absolutly loves it, he says it's a blast to fly. ;)

Just for fun, I have started to make some tests with an 64mm EDF 4800 kv, instead of the Park 450 motor, here are the images:

Here is the video in flight:

I was using a 3S 1300mAh 20C battery and it was puffed up because of overcurrent, I'm going to try a 45C battery, but anyway the experiment was a lot of fun.

 Update 30/08/2015, Intalled exhaust tube for edf and tried 1500mAh 35-70C 3S battery, it really improved the speed and thrust. ( around 30 mph)

Greetings from Mexico.