E-Props calculators

This program calculates the efficiency of a propeller based on various parameters. It only applies to E-Props carbon propellers, with their specific airfoils and thin chords: the values obtained cannot be achieved with other propellers.

Replace the example values below with your own data, for any propeller, then click Calculate to obtain the ideal propeller's efficiency as well as its tip speed.

Please note: this simplified model provides a first indicative approach, accurate to +/- 5%. It does not take into account the mechanical aspects imposing a certain geometry on the blades, and calculates the efficiency of a propeller at the specified matching point. E-Props' engineering department carries out much more advanced calculations and detailed analyses to define the aerodynamic sizing and the mechanical behavior of the blade under load, as well as the precise performance at different operating points — this is the purpose for which the in-house LUKY software was developed. Each E-Props propeller is custom-made for a given aircraft configuration and engine, according to the pilot's desired specifications.

E-Props does not offer propellers with a diameter smaller than 115 cm.

This calculator estimates the maximum hover-flight time of a drone. Fill in the form below with your own values, then click Calculate.

Formulas used:
mass flow rate: dm = ½ · ρ · Area · V_wake
airflow power: P = ½ · dm · V_wake²
thrust: T = dm · V_wake
absorbed power: P_a = ¼ · ρ · Area · (2T / (ρ · Area))^(3/2)