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Let's start the estimation with the drag: $$ F_D = \frac{1}{2}\rho v^2 C_D A $$ Where $C_D A$ is going to be your form factor, depends on your drone design. Here are some example $C_D$ values $\rho$ is the air density. Here are some values, depending on temperature. If you increase the pressure to say 2x, the density also increases 2x. v is the velocity If ...


This article might be of interest. It turns out energy expenditure is as much a factor of air temperature as anything else. Figure three seems to be pertinent to your question. As it becomes a matter of simple mathematics to convert from their units to yours, I leave that to you!

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