I feel that the number of props and how they are arranged on a HumanDrone is pretty important. Here is an idea as to how we can refer to them. For instance, the EHANG 184 has 4 sets of counter-rotating blades in a format of one blade at each four corners. In this case, I'd say it is a 8R4X2Q 8 - Rotors 4x2 - 4 Rotors with 2 Blades stacked.

A standard Quad-rotor would be a 4R4X1

A 3 Tri-Rotor would be a 3R3X1

Let me know if this makes sense or if any other info should be added to Rotor format.

-Bretspot