If I were to make a LEGO fan how would I make it blow air on me? I was just wandering off into my imagination and then it hit me: I should make a LEGO fan?

I mean, how hard could it be?



It is actually very hard for me. No matter how much ratio I put on it, it would not blow air! Even when it does it always ends up blowing backwards. Please give me some tips.
A fan is just 1/4 of a drone, right? Check out this lego drone that actually flies, for inspiration. https://youtu.be/wUVvQk7XLd4



The blade part in question is 89509