For example, level 1 helicopter blood volume: 10000 For example, level 2 helicopter blood volume: 20000 For example, level 3 helicopter blood volume: 50000
This idea is very good. Which plug-in is it?

Hi, this sounds pretty similar to a suggestion that was made before (and has been made a lot). It's not something I feel would fit the general purpose of HeliControl, and would be better suited for its own separate plugin.
I elaborated a bit more on it here: https://umod.org/community/heli-control/15229-different-helicopters-levels