whatmovesyou
Eyespy is a "scratchbuilt" version of AURORA's SKATE sUAS. It has no surface controls, thrust vectoring, VTOL capabilities, flies high alpha and stores in a rucksack.

This is the video showing it in an old building. If you want to see Skate chase the car, google Aurora skate. It is a corny video, but who know's?


Flying this sUAS is different. With thrust vectoring in the nose, elevator is okay, ailerons not so, (have to work on CG and angular thrust of motors). Ended up using differential thrust( see the article how I solved controlling rudder thrust) with elevator to make both left and right turns. Was like learning how to fly with a SIG KADET.
The video is long, but to show I finally got some control including the landing. I will try to do "up elevator" so I don't do damage to the servos, motor and props.

I like to design and fly unique planes.
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whatmovesyou
Eye Spy 003.JPG 

This is my EYESPY sitting ready to take off. Left the side plates off so I can get at the inside. Have gone thru a number of crashes including tries at a vertical takeoff.
Winds have been running 8-12mph, hoping to try tomorrow. The build is located here, if your willing to try it.
Aurora must have gyros in their motherboard, for this is no beginner's drone.
I like to design and fly unique planes.
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whatmovesyou
Ended up moving CG forward (now at 20%) and has improved flight characteristics. Throttle is very sensitive 1/5 to 1/3 is all it needs. Ailerons are now working and got in 4 flights with 5-10mph winds before it crashed in a gust. Will re-build and move CG forward. Also trying to land by pulling up so motor mount doesn't break off. Hope to try vertical takeoff. High alpha is impressive and actually hovered in the wind without rotating.
I like to design and fly unique planes.
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whatmovesyou
Some one asked me for more info on the build, so hear goes.

The company give very little info other then 24" wide and 19" deep. So decided to build out of FFF where I use the fold of two sheets to make leading edge. To shape airfoil, just cut strips and installed within sheets lengthwise and developed whatmovesyou 007 airfoil by eye(hence, eyespy). Hot glued to one side of wing. Highest point is 1 1/4".
Rudder size was again take a view from Skate and scale it.(looks good) Cut slot in wing, opposite slot in rudder and your have it put everything together with hot glue. I have a low temp and high temp guns. Need to use the high temp to get all surfaces before it cools.

ascent 003.JPG 

Lipo Battery width was determined and fuse was made so it fits inside and leading edge was cut back to accept body. It was done by hacking out until it fits. Aurora has moved it to top on latest revision. A top view.
Eye Spy 001.JPG 

[attach:fileid=23477]Eye Spy 005.JPG 

I first shaved FFF block to fit airfoil so that flat surface takes glue servo. For motor, made wooden frame(used super glue) so it holds motor to servo by 2 machine screws.

Servos run elevon setup and differential thrust provides yaw. Without any surface controls, until I got CG under control, it would not fly. I would chuck it time and time again and have no luck. Had to throw it engine running to see if it went nose down or flipped backwards. No other way. Large deflections of servos are needed to control this beast.

Now the bad part. Every landing requires power on, causing motor damage,(look at their video). Need I say more. I tried switching mode to put servo up before landing, hard to guess right instance.

The company now has added an elevator and when engines are cut, quickly go up to end of travel.

I don't know what the cost at what they sell it with the micro-board installed, and how long it took to develop, but mine was real cheap and quick, but priceless.
I like to design and fly unique planes.
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sukhoicx
hi, can u tell me the total weight and approximate thrust to weight ratio, thx
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whatmovesyou
Quote:
hi, can u tell me the total weight and approximate thrust to weight ratio, thx

The weight with battery was about 21 oz and the thrust/weight was about 3.2.
I like to design and fly unique planes.
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