I want to make a quad rotor UAV. i studied a lot but i did not find how static thrust is being calculated. In physics forum i have found an equation which is given below but i can not understand what is 'frac' and 'rho'.(adsbygoogle = window.adsbygoogle || []).push({});

Equation is:

T=\frac{c_T}{c_p}\frac{P}{nD}

Where:

P = power (ft-lb/s or kWW)

T = Thrust (lb or kN)

D = Prop Diameter (ft or m)

n = rotation speed (rev/s)

c_P = Power coefficient

c_T = Thrust coefficient

And:

c_P=\frac{P}{\rho n^3 D^5}

c_T = \frac{T}{\rho n^2 D^4}

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Aerospace Calculating static thrust

Loading...

**Physics Forums | Science Articles, Homework Help, Discussion**