So, english isn't my first language, so I probably couldn't find any kind of information about it due to not being able to define what I'm asking.

Anyway, helicopter blades are normally like this:

[![enter image description here](https://i.stack.imgur.com/TihqO.png)](https://i.stack.imgur.com/TihqO.png)

An "off-center" helicopter blade would be like this:

[![enter image description here](https://i.stack.imgur.com/szcQZ.png)](https://i.stack.imgur.com/szcQZ.png)

I'm quite ignorant about aerodynamics and I couldn't find anything about it, so I hope someone here knows if a design like that would have any kind of advantages whatsoever.