# Multirotor hover power
# Scope: Ideal actuator-disc induced hover power plus supplied efficiency; no propeller curve.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

mass = 2 kg
rotors = 4
diameter = 0.25 m
density = 1.225 kg/m^3
efficiency = 0.6
gravity = 9.81 m/s^2

thrust := mass*gravity [N]
area := rotors*pi*diameter^2/4 [m^2]
power := thrust^1.5/sqrt(2*density*area)/efficiency [W]

check hover power budget: power <= 400 W

scenario alternative: mass = 1.6 kg