Coanda effect thruster test

More at http://www.laesieworks.com/ifo/GN/GN003.html
A test with my 2004 Coanda effect thruster.
The centrifugal pump on top blows a jet of air over the curved surface of the disc. This causes a drop of air pressure on top of the disc. The engine used here, is a cheap one from a small vacuum cleaner. As you can see, it gives about 288 grams of thrust. The engine uses 652 watts, so that's only 0.44 grams per watt. That's not enough to lift its weight, but enough to push a little car, as shown in this video.

Category:

Science & Technology

Tags:

• coanda
• effect
• thruster
• experiment
• thrust
• propulsion

[SEKILIN]

Beautiful design, I was wandering if there is a way to get a light weight energy device to feed the engine without external cables

[Trebseig]

@SEKILIN,

Ways to improve on this version; one would be a better engine (less weight, more power). Then it would be able to lift its weight and fly! But putting batteries/fuel on board would make it too heavy again. For efficiency, a "vacuum cell" around the top might be key (with a vortex ring inside), but that isn't easy to construct and the control over the velocity of the air jet becomes very critical.

[gilbondfac]

very good tests on coanda effect! bravo !

[Trebseig]

@gilbondfac,

Thank you  :-)

[tpm302]

Pure coanda thrust, great job!  I'd love to see a demonstration with smoke. What fraction of the air flow do you think is being utilized(staying along the surface to produce downward thrust)?

[COROVICD]

I might be wrong, but another way to improve lift would be to change the shape from spherical to friz-by or frying-pan. Simply put, a flatter shape will produce more force lifting up. On spherical shape, after 45 degrees air pressure is pulling more and more horizontally. Actually, just buy a good plastic friz-by and put the motor in the same place.

[1BustedMyth]

Clever prototyping

[DanFrederiksen]

interesting test. I have considered a similar design. I wonder why it is so inefficient. deserves further study

[TK42138]

What would happen if a shaped cover was placed over the top fan to direct airflow in a more stable pattern? Would this help or would it de-stabilise the coander effect?

Your research and experiments are fascinating since you're doing it with practical and theoretical modelling.

[fuelban]

Nice video, well made & very interesting stuff, thank you.

Thom in Scotland.

[wwwGUSTAVOSOLANOcom]

MUY BUENO GRACIAS POR COMPARTIR

[ICALNESCORP]

MUY BUENO AMIGO

[jmantheburninator]

what it this for exactly?

[kaltiki2000]

Cool!!!