Instructables
This airframe was designed to meet the ten below criteria with the final goal of carrying an aerial mapping payload.

Before designing the Black Eagle I sat down and drew up a list of design aspects that I would like to include in the plane:
The plane must be energy efficient and have the ability to operate for long durration photography missions
The plane must be easy to build using well know construction methods 
The plane must be easy to repair and modify 
The plane must be easy to balance (easy to find good CG)
The plane must be cheap yet sturdy 
The plane must be ready to accept FPV and APM systems 
The plane must be able to carry a high-definition camera 
The plane must be easy to fly and fly well in "iffy" conditions 
The plane must have the ability to operate in suburban environments 


For testing I used a 2200Kv motor with a 6x4 and some small servos. The ESC was a Hobby King 40A. The final version will most likely have a 1100Kv and a much larger prop.
I used cheap packing tape and red and white Elmer's foam board. 

This is an unproven design and this Instructable is just a general explanation of the build process. Please adapt this design to meet your mission. If you do, I would appreciate if you left some pictures in the comments. 

A little note on the name: The name Eagle was chosen because this is an aerial mapping UAV and some eagles can spot prey when they are 4500 feet away. I thought that it was appropriate for two birds with good eyesight to share a name. It is the Black Eagle because I plan to build a carbon fiber version. 
 
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NAVET974 months ago

Oh is this your invee design?

Justinvent (author)  NAVET974 months ago

The drone displayed here does not have the v tail installed

Oh yeah I see that now! LOL is it hard to add?

mvan leeuwen4 months ago
Nice work on it, best uav build instruct if have seen.
All it needs now is to go airborn
Justinvent (author)  mvan leeuwen4 months ago
I'm glad you like it! I have been so busy this year I need to fly it this summer!
ncanm12346 months ago
Ahh maybe a on board video of it flying?
This thing looks pretty cool. How do you launch it?
Justinvent (author)  theDeltaDummie1 year ago
I have not dealt with the launch system yet. It will either be a very scary hand launch or a ground take off if there is room for a gear. If you have any suggestions I would love to hear them!
jongscx Justinvent12 months ago
Rockets! or bungie cord...
Justinvent (author)  jongscx11 months ago
I actually have some rocket fuel related Instrucatables and would like to put rockets on the drone but sadly that is illegal.
jongscx Justinvent11 months ago
I was talking about using a JATO-like rocket assist... or is that what you were talking about as being illegal?
Justinvent (author)  jongscx11 months ago
Now I understand. I don't know if that will be reliable enough or the best option but thanks for the feed back.
Have any video of this guy in action?
Justinvent (author)  audreyobscura1 year ago
Not yet but check back later this month for some.
dchall81 year ago
If you have not used any mechanism to counter the effect of adverse yaw, you might be fixing this plane a lot. There is a really good reason why airplanes have deflecting rudders. It is the same reason the flying wing design never successfully made it out of flight test until the computer age. Adverse yaw is the result of additional drag on the high wing when making a turn. It tends to make the aircraft point skyward in the middle of a bank. Wikipedia has a pretty concise article on the topic.
Justinvent (author)  dchall81 year ago
The reason this version has no rudder is because its purpose is to test the balance of the design. The final version will have a rudder and a computer control system. Thanks for the insight!
Have you flown this design yet? Is it stable in the yaw axis? I have an inverted v-tail that I have flown quite a bit and enjoy.
https://www.youtube.com/watch?v=z0cWlOsJCRc

Have fun and watch out for that propeller when you launch that thing!
Justinvent (author)  bobalexander1 year ago
I am yet to fly the design but should get to this month. I'll keep you posted! Concerning your V-tail, did you do any calculations to decide the angle or did you just use trial and error?