Angry Birds RC

[jetpackninja]

You essentially have a delta wing. Wings don't fly well (or at all) if they are tail heavy.
Use a calculator to approximate the beginning point for your cg.
Your design has a lot weight near the back of the plane...

Here's what I use to determine where to balance my flying wings:
http://fwcg.3dzone.dk/

 

[Spektrum 514]

I will attempt the build again and have calculated the CG using the calculator you suggested. Do you think I should go with the 15% CG Position? I will also make the control surfaces larger and enable more throw. It may have also been over powered causing it to pull to the right due to torque. I will look at downsizing the motor to a 300 or 400.

 

[jetpackninja]

My guess is that you probably have enough throw.
Too much throw on the elevons can also cause problems.
Full length elevons may help if it is a problem where the surfaces are not big enough
What's the weight of the plane? You might be overpowered but I doubt it.
How are you launching. Might try launching at 1/2 to 1/3 power and give a good toss.
You may just not be getting enough initial airspeed to let the controls do their job.
The 15 percent is probably a good starting point.
If you get too nose heavy you will find it difficult to flare when landing.

 

[jetpackninja]

I would mess with the CG on your current design before changing much else

 

[Spektrum 514]

Yellow Angry Bird RC - Take 2. I used Dollar Tree Foam board this time. I also downsized the motor and made the elevons 3" deep for more throw. I maidened it and it actually flew to my surprise. It handles failry well at about 3/4 throttle. I will post all the items used to build it later.

 

[colorex]

Great! It's always exciting when something actually works out!

Are you going to make any plans?

 

[Spektrum 514]

2nd flight flying with right hand and videoing with left hand.

 

[Spektrum 514]

Well here is the list of materials I used to create the Yellow RC Angry Bird.

Body, Eyes, Head and Tail Feathers: Dollar Tree foam foard x 3 - $1.00
Beak: Light plywood - Laying around my shop.
Wing and Rudder Supports: Small diameter aluminum rod - Laying around my shop.
Wingspan: 28''
Length: 20''
CG: 8.67" from the nose.
Motor: ERC Brushless 400 - $19.99 @ Local Hobby Shop
Propeller: APC 9x4.5 - $3.95 @ Local Hobby Shop
ESC: Hobbyking SS Series 18-20A - $7.15 @ Hobby King
Receiver: OrangeRx R610 Spektrum DSM2 6Ch - $5.99 @ Hobby King
Servos: HXT900 9g / 1.6kg / .12sec Micro Servo x 3 - $2.69 @ Hobby King
Battery: Sky Lipo 1000mAh 11.1V 20C - $6.10 @ Hobby Partz
1/4oz Sticky back lead weights to balance - Laying around my shop.
Control Horns and Pushroads - Laying around my shop.
Hot Glue Gun to assemble everything - Laying around my shop.

Total Cost to Build = $55 minus the things laying around the shop and paint.

I originally made the beak out of foam but it bent and cracked up after only two landings. I then made the beak out of light plywood. I still need to put a second coat of paint on the black and white areas. I had to put 2.5oz of weight on the nose to balance it out. I may remove the weights and see how a 2200mah battery weighs it out.

 

[Fishbonez]

Wow that is really cool. Looks very stable. Great job

 

[Spektrum 514]

More video of my Yellow RC Angry Bird