4 ms·
This is not correct. Here are the formulae: Lift = weight = 0.5 * \rho * v^2 * S * C_L Power = drag * speed = 0.5 * \rho * v^3 * S * C_D where \rho is the ai
by namirez 7y ago
This is not correct. Here are the formulae:
Lift = weight = 0.5 * \rho * v^2 * S * C_L
Power = drag * speed = 0.5 * \rho * v^3 * S * C_D
where \rho is the air density. A good assumption for cruise is (C_L/C_D)_max. If you do the math, you realize that for a constant weight, the power output must be proportional to:
Power \propto \rho^{-0.5}
For example, to fly a plane at 10km above sea level you need twice as much power than sea level. This is totally independent of your propulsion system.