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

Posted by Jean-Louis Naudin on December 4, 2010 at 6:20am

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,

Jean-Louis

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Comments

Lew Payne December 14, 2010 at 11:39pm

Coanda's "N-30120" Lenticular Aerodyne:

http://www.laesieworks.com/ifo/lib/Henri_Coanda-pict/Coanda-Lenticu...
Lew Payne December 14, 2010 at 11:13pm

Consumer Reports debunked the efficiency of the Dyson Fan you have pictured above. This may or may not be relevant to the Coanda saucer, so I caution folks to jump to any conclusions here.
Developer

Jean-Louis Naudin December 14, 2010 at 10:23pm

Hello, you will find below a very interesting commercial application of the Coanda effect done by Dyson.

This is the DYSON AIR MULTIPLIFER, by the use of the Coanda Effect, the airflow is MULTIPLIED BY 15.

Look at below how the Coanda effect is used here:

This is exactly the same effect used in the Coanda Effect Saucer, see the CFD simulation below:

More infos in the Dyson web site and here

See how it works in the video below:

Below Sir James Dyson explains his bladeless fan in the video below:

Regards, Jean-Louis
T3

Jared S December 14, 2010 at 8:28am

I think I remember reading that a coanda vehicle is about 80% less efficient than a pure ducted fan.
Richard Dugmore Jr. December 9, 2010 at 10:40pm

Wow Excellent!!
Matthew Coleman December 9, 2010 at 9:41am

Thanks for satisfying the curiosity.
Regards Matt
Developer

Jean-Louis Naudin December 8, 2010 at 11:12pm

Hello Matt, I agree with you, I think that a radial impeller from a compressor will be the best way to get a maximum airflow speed for blowing the Coanda saucer surface.

The best setup will be with a thin output slot and a very high speed tangential and radial airflow.

Regards, Jean-Louis
Matthew Coleman December 8, 2010 at 2:24pm

Jean-Louis,
I am curious to know if you think a radial/centrifugal compressor would work instead of the ducted fan.

Matt
A. Rafael Ptacnik December 8, 2010 at 8:46am

3mm Depron Foam > Here
Avia Sport Carbon Rod 0.040 x 32.5 (1.0mm)> Here
Lew Payne December 7, 2010 at 11:08pm

Regarding the paper you referenced, entitled "The Coanda Effect and Lift:"

I am very happy to see some good science taking place here. Namely, that they state unequivocally that "lift is not caused by the Bernoulli effect." I've seen many science textbooks, aeronautical books and other teaching aids incorrectly attribute "lift" to the Bernoulli effect... some complete with illustrations of said effect! What's happening here (in Coanda aerodynamics) is radial momentum (flow), as explained by Ed Seykota.

Delusions