Not sure if this thread should be in General Pattern or Electric, but anyway...

Here's a cool video about vortex generators (VGs) showing attached/separated flow with lots of nice fluid dynamics illustrations:

https://youtu.be/eP-YUDe9HF0

I have been wanting to use VGs for a long, long time, but I didn't think of an easy, reversible installation process. I bought 2 x of the F3A Unlimited kits.

I don't know if everyone knows this or not, but if not - VGs are very useful on lots of light and heavy airplanes (Boeings use them as well as bush and some cabin class aircraft such as the Aerostar). Not only that, the issue of flow separation on our little models (compared to full-size), if I'm not mistaken, is much greater - aerodynamically speaking - than it is on full size aircraft because of the relative size of a model vs a full-size which both move through the same air with the same physical properties. This is why the saying "size matters" and "bigger flies better" is true.

I think one reason they're not more widely used is that it seems 100% counter-intuitive to put sharp pointy things sticking out perpendicular to smooth shiny flight surfaces - it just totally seems wrong.

And have you heard of the "tubercles" on the pectoral fins of whales? That's right, VGs for better propulsion.

I'll give it a try and let you know how it goes.