The SCORPID-500 a full IMU controlled OAT/VTOL UAV

The SCORPID-500 is now fully stabilised and controlled by a 9 DOF IMU (ArduIMU+ v2, HMC5843, GPS with firmware TriStab v3.3 JLN). The SCORPID-500 VTOL UAV uses an innovative design based on Gary Gress concept from Gress Aero. The Oblique Active Tilting (OAT) at 45° of the twin engines allows a full pitch control by using the induced gyroscopic moment. Today, the SCORPID-500 UAV prototype has done its first successful flights full IMU stabilised. Its flight is very stable. The earlier prototype has used 4 gyroscopes on board and some addtionnal mixers.

Stay tuned on: http://diydrones.com/profile/JeanLouisNaudin

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Developer
Comment by Randy on November 16, 2010 at 4:53pm
Very neat. i've never seen something exactly like that before actually flying. It looks a fair bit like the helicopters they had in the movie, "Avatar". What's the back wing for? That's not actually doing anything at low speed right?

Developer
Comment by Jean-Louis Naudin on November 16, 2010 at 11:02pm
Thanks for your comments. As you may notice, the angle of tailplane seems a bit strange and uncommon compared to a conventionnal airplane. During the hovering is not used, but it is useful during a fast forward flight to negate any tendency to pitch up.

Regards, Jean-Louis

Developer
Comment by Jean-Louis Naudin on November 17, 2010 at 12:55am
Hello, you will find below some technical details about the setup of the SCORPID-500 the OAT controlled UAV...


Regards, Jean-Louis
Comment by Mike on November 17, 2010 at 10:39am
Gary Gress' aircraft can be found here - http://www.gressaero.com/
Comment by Michael Lingg on November 17, 2010 at 10:47am
I believe this design differs a tad from Gress' design as this one has a 45 degree angle for the tilt as opposed to the Gress 90 degree angle. Balances the gyroscopic effects while still allowing for propulsion from the rotors being tilted?

Developer
Comment by Jean-Louis Naudin on November 17, 2010 at 1:24pm
Hello, the SCORPID-500 design is fully in line with the single axis OAT design from Gress. The obliqueness between the main spar and the tilt axis may vary between 30 to 45°...
Regards, Jean-Louis

Developer
Comment by Jean-Louis Naudin on November 17, 2010 at 11:36pm
Here a detailled photo of the OAT system that I have designed and built for my SCORPID-500 UAV:

Regards, Jean-Louis

Developer
Comment by Jean-Louis Naudin on November 17, 2010 at 11:39pm
You will find below the full diagram of the special mixing that I have tested successfully in flight with my SCORPID-500 UAV:

Regards, Jean-Louis

Developer
Comment by Jean-Louis Naudin on November 18, 2010 at 5:44am
You will the good method for obtaining a good Center Of Gravity (COG). If the SCORPID-500 is hanged with a rope attached to the two main motors axis, you must get this below:

Regards, Jean-Louis
Comment by Ron Jacobs on November 22, 2010 at 7:41am
Would the tail not also encounter a fair bit of Drag at forward flight?

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