Drones & Aircraft STL Download - Drone propeller 4.17" diameter, 5.3" pitch, 5mm boreby LAK

This is my designed drone propeller. I am a professional propeller maker and you can count on my propeller.This is 4.17" inch diameter and 5.3" inch pitch propeller. At 30000 rpm it has been tested to fly 190km/h on a regular not aerodynamic drone frame. Theoretically it should fly 230 km/h at 30000 rpm if there is no losses to aerodynamics.Best performance can be achieved when propeller surface is smoothed well because surface roughness is horrific energy waste due to increased drag.Prints nicely on FFF printers and has a flat bottom for easier printing.