(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

basically I am doing work that requires me to calculate power for given thrust of a fan which is hovering.

2. Relevant equations

We are given the diameter: 0.8m, thrust output of fan: 250kg, rho=1.1455 kg/m^3, and eta which is the fan efficiency = 0.8

3. The attempt at a solution

I found this equation in wikipedia:

P^2 = (T^3) / ( (eta^2)(rho)A)

using this equation I got 7322w of power to attain a thrust of 250kg...This seems a little off. What is wrong here? does anyone know if this is even the correct value or even correct equation? thank you and appreciate it!

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# Homework Help: Hovering thrust calulation

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