Coanda Effect Saucer (CES) UAV with an ArduIMU+ V2

Here a project of a Coanda Effect Saucer (CES) stabilized with a 9D0F IMU. The CES UAV, propelled by an electric engine, uses the Coanda effect to take off vertically, fly, hover and land vertically (VTOL). There is no big rotor like on an helicopter and the flight is very stable and safe for the surrounding.

The Coanda Effect has been discovered in1930 by the Romanian aerodynamicist Henri-Marie Coanda (1885-1972). He has observed that a steam of air (or a other fluid) emerging from a nozzle tends to follow a nearby curved surface, if the curvature of the surface or angle the surface makes with the stream is not too sharp.

I use my firmware AutoStab v4.0 installed the ArduIMU+ V2 flat with a special mixer for this device.

Stay tuned on this blog, more to come soon,


Views: 51224

Comment by Jean-Louis Naudin on December 4, 2010 at 8:04am
Here some 3D views of my prototype CES v1.2 currently built and tested in flight.

Tests flights are a bit slowed now, due to the snow and the stormy weather in my country...
Regards, Jean-Louis

Comment by Mark Colwell on December 4, 2010 at 8:15am
Jean, Can it carry bright blinky lights for night time flights ? :-)

Comment by Jean-Louis Naudin on December 4, 2010 at 8:33am
Hello Mark, yes of course, why not ;-)
Below some photos taken during outdoor flights.

Regards, Jean-Louis
Comment by Eric Smith on December 4, 2010 at 9:55am

This is awesome. With just one motor, how does the rotational torque get counter acted?
Comment by Eric Smith on December 4, 2010 at 10:28am
I got it, some of those sets of veins in the upper part are movable. In a steady-state they are positioned to deflect the air stream so as to counter-act the rotational torque. Very cool.
Comment by Eric Smith on December 4, 2010 at 10:32am
A little more on this. I'm guessing the reason you need 6 servos is that 2 are used to control the directional veins and the remaining 4 control the veins that control the rotation/cancel the rotation torque?

Comment by Jean-Louis Naudin on December 4, 2010 at 10:51am
Yes, there is a 24 rims of small rudders 8 set of 3 around the saucer, 4 sets are fixed and 4 set are controlled bu a yaw servo.
Below a photo of the sets of rudders:

below a photo under the hull of the saucer which shows one of the four servos dedicated to the yaw control.

The four yaw servos are connected in parallel to the yaw PWM output of the ArduIMU.
Comment by Lew Payne on December 4, 2010 at 11:00am
Nice... similar to this video...

Comment by Jean-Louis Naudin on December 4, 2010 at 11:32am
Yes, the original Coanda Effect saucer concept have been invented by Geoff Hatton from GFS Limited, this company has now disappeared and today a such device has been renamed "the Fenstar" from company Aesir. This saucer is directly inspired from the original Coanda saucer invention (1939) and also from the Viktor Schauberger saucer (1945) which was one of the first VTOL UAV worldwide....
Regards, Jean-Louis

Comment by Gary Mortimer on December 4, 2010 at 12:44pm
Well done!

You might have beaten AESIR to autonomous flight with one, I know of some forward flight issues with this design. I believe BF Goodrich now have a tie up with AESIR, at least I think it was them.


You need to be a member of DIY Drones to add comments!

Join DIY Drones


Season Two of the Trust Time Trial (T3) Contest 
A list of all T3 contests is here. The current round, the Vertical Horizontal one, is here

© 2019   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service