I'm in the process of building a hovercraft. In order to lift it, I'll need a motor directing the flow of air into a skirt. The specs for the motor I'm looking at say that it can turn a 15x5 dual-blade propeller at 6,000 RPM with 262W of power.
However, the motor is designed to be used by a large drone. In that case, the motor only has to work against atmospheric pressure. My hovercraft will have about .17 psi of pressure within the skirt. How do I adjust the required power for a given RPM based on the pressure below the propeller?
Mass is 87kg
1.6m x .45m
Cushion Pressure: 1.185 kPa
Inward flow during static flight is 3,000 CFM (I believe that means flow out is also 3,000 CFM?)
These are the motors I'm looking at: https://www.getfpv.com/tiger-motor-mn4014-330kv-antigravity-2-motors.html