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
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.
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
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
1crazyfocker 4 months ago
@1crazyfocker
thks buddy
Mopozco 4 months ago
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.
TK42138 5 months ago
@TK42138
thx, TK;
yes, it's very interesting topic, pity, have no time for it...
cheers
Mopozco 5 months ago
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
TopGunMan 7 months ago
does the slot also create more load on the motor?
DanFrederiksen 7 months ago
nice work
cchi0000 8 months ago
Volts and Amps?
leviterande 10 months ago
@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
Mopozco 10 months ago
Man you sould measure the POWER too...
leviterande 10 months ago
@leviterande
man, power drops too (lol)
Mopozco 10 months ago
Can you make that music a little quieter please. It is blasting my ears off.
zooto68 1 year ago
@zooto68
as you wish, buddy...
Mopozco 1 year ago
spoilers and flaps has nothing common with this effect;
it’s already developing on hi-speed boats;
search for cavitation
cheers
Mopozco 1 year ago
btw..this has nothing to do with Coanda....to spend time for what in aerodynamics they know since 25's ?..lol//search for kruger spoilers.....
GRATZIANI2002 1 year ago
Very interesting effect. Simple and makes perfects sense. Thanks for sharing!
jyandow 2 years ago
No, just a blind groove (slot) in the back part of the wing.
Vacuum created in it by Coanda effect do the job...
Process similar to cavitation of prop in the water but useful.
Mopozco 2 years ago
intersting video, but do you supply air to the slot , you know a high pressure or something like that
leviterande 2 years ago