Coanda effect "slot-wing extra lift"

Made some tests with Coanda effect and have found it very fascinating that the same air profile can create much more lift if it has a blind slot (vacuum cavity chamber) in certain place of airfoil.
In short, shown is a thrust development in airfoil within it's modification.

Category:

Education

Tags:

• airfoil
• coanda
• effect
• cavitation
• slot-wing

[1crazyfocker]

you do know that it was discoveried that if you dimple the top, (like a golf ball) it has the same effect. as the dimples cuts drag by alarming amounts. you should try that. then try that with your slot. compare, and even try a hybrid of the two. yes the golf ball dimple idea in the wings have been known for a while. we dont do it, because of cost. but you might learn a thing of two from those test.... great work and nice video thanks for shareing

[Mopozco]

@1crazyfocker

thks buddy

[TK42138]

I know this might go against normal aerodynamic practice but if you were to add a thin layer of some material that has a rough surface this might keep a boundary layer which actually reduces drag. Sharks have been doing this for millions of years with their rough skin. To a fluid dynamicist air and water are the same thing and pretty much behave the same way but on different scales. Keep up with the good work. After all, the hovercraft was invented by a bloke working from a shed.

[Mopozco]

@TK42138

thx, TK;

yes, it's very interesting topic, pity, have no time for it...

cheers

[leviterande]

Volts and Amps?

[Mopozco]

@leviterande

it was 2 years ago, man (lol);

now it's all different...

will be updated, but it's a good stuff, google cavitation to speed up a boats

cheers

[TopGunMan]

Its probably for the same reason why they put small turbulence triggers on the top center edge of aircraft wings. Turbulent flow follows profiles much easier than laminar flow, look at the golf ball. Your back edge, with more turbulence thanks to your cut, is experiencing improved flow sticking

[DanFrederiksen]

does the slot also create more load on the motor?

[cchi0000]

nice work

[Mopozco]

@leviterande

man, power drops too (lol)