Vortex (Air Tabs)

Thanks to (https://www.thingiverse.com/WarHawk8080/about) for the great Idea, these things are great for full size and RC cars and planes and other vehicles. They give you fuel efficiency on vehicles and increase the stall speed on airplanes. Can be easily installed by using double sided tape and also easily removed. You will have to print quite a few for them to work.

Here is a similar idea: https://www.thingiverse.com/thing:1251022

How it works: https://diy3dprinting.blogspot.com/2016/03