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1

First, thrust = ma = mv/s Next, what type of engine are you referring to? Throw out the first graph, it's all about propulsive efficiency vs speed (props, fans, etc.), not about engine efficiency. Considering exhaust only, the engine has to work to push out the exhaust. This is why rockets have more thrust in space. Also known as "backpressure". ...


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Power consumption=Kinetic energy=$1/2mv^2$. Thrust=momentum change=$mv$. This is only true if the engine is perfectly efficient internally and the air is still relative to the aircraft. If the air is moving relative to the aircraft (and the engine is still perfectly efficient internally) then. Power consumption=Kinetic energy=$\frac{1}{2}mv_e^2 - \frac{...


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