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First Balsa Plan Build FlyingWing Glider CO7

FlyMax

New member
#1
These are the dimensions of the CO7 FlyingWing glider that I used to scratch build my very first balsa plane, the plans are found here: http://www.aerodesign.de/modelle/NF/co7_hlg.htm
If you have any questions about this model or want help to build one yourself, hit me up! :D

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The airfoil was chosen and the plywood rib template built:

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The ribs are cut out of 2mm balsa wood, then stacked together and sanded:

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Next I joined all the ribs with one 5x5 mm balsa spar and also used 5mm balsa on the leading and trailing edge, the bottom was sheeted with 2mm balsa which I would sand down al together with the trailing edge at the end:

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I started out with the fuselage and simply build it in a box- style out of 5mm balsa which I later on sanded to a round shape:

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The wings were joined and mounted to the fuselage as well as the lower sheeting of the wings finished and winglets made out of solid 5mm balsa, finally it started taking shape:

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The placement for the elevon and flap servos was chosen:

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The fuselage got its final shape and the magnetic hatch mount got installed:

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Then I sheeted the top of the wings with 2mm balsa:

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Of course elevon and flap surfaces still had to be cut out of the wing and the cut- outs for the servos too:

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Elevon and flap surfaces shaped and completed:

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After adding a few more details, the wings and fuselage were sanded with very fine sand paper.
Because I could not get hold of any monokote or light fiberglass cloth and epoxy resin, I decided to use 2- component wood varnish to coat the glider; I used what I had. :eek:

In the next post you will see pictures of the finished bird! ;)

Max
 

Attachments

FlyMax

New member
#2
Finished Bird!

This is the finished bird!

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Here is a short video soaring around looking for thermals :D


Furthermore I built a power pod with landing gear for flying in no wind conditions, pictures will come in the next post!

Max
 

PsyBorg

Wake up! Time to fly!
Mentor
#7
How come all these other glider guys have to get a running start or spin in circles all while grunting and making strained noises yet you gently push yours into the air and off it goes? ;) I think people could learn a lot from you. Welcome to Flite Test

I love to look of natural wood grains on anything from Guitars to air planes to coffee tables. That is one beautiful aircraft.

If that were me piloting that I would throw it out there make the first few turns then start walking down that hill side to go get it hehe.
 

nhk750

Aviation Enthusiast
#9
Beautiful and impressive. This would be a fun scratch build. How would you recover it if you couldnt make it back, it looks like a wicked hill climb?
 
#10
Thanks for all your nice comments, I like putting time into my models as I enjoy building them.

The effortless launch is only possible because of the slight breeze coming up the mountain, so it's flying in a combination of slope lift and thermals. When the lift conditions are not perfect there is definitely some good walking involved in retrieving the model after a landing.
However, in perfect conditions with slope lift, I can glide the model around and slow it down so far with the flaps, as to simply land it in my hands - takes some practice though :p
 
#11
Motorized fuselage

The design flies really great, the only problem in the glider configuration is that the 4 x AAA battery pack, which I use to power the receiver and servos, is not enough nose weight to get the CG right.
Because the fuselage doesn't have enough space for an AA battery pack the only solution was to mount the batteries further out, in front of the fuselage.
Of course this was not a very nice solution, so I short handedly planed on building a new balsa wing glider from plans that I drew up myself. I also increased the wingspan to 2 meters and planned on using Monokote for the covering.
I will start another thread shortly, showing the build process of my new design, and explaining the integrated improvements.

As you can imagine though, this was not the end of the V1 flying wing glider.
I still had the 1350kv motor and 30 Amp ESC from my Cessna Corvalis around and decided to build a fuselage pod with landing gear from the same Cessna.
Here is the process of the build...

5mm balsa for the base plate:
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3mm balsa for the fuselage sidewalls and 5mm for the firewall:
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Bamboo sticks for the wing attachment with rubber bands and smooth sanded fuselage:
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Landing gear and motor installed, ready for the wing!
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Ready for the motorized maiden flight!
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Flight from my 'Aircraft Carrier' style terrace, please don't mind my cry of relief at the end :D