# Questions tagged [polar-curve]

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### What would be a good way to present airfoil performance diagrams and requirements to aircraft designers? [closed]

Airfoils perform in differing flight regimes (i.e., at take-off and cruise). The current practice is to plot $C_L$ .vs. $\alpha$ or $C_D$ at some $R_E$ (& perhaps Mach number). This is basic ...
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### How does pitch relate to glide angle?

When flying a glider, you have a polar curve. As your speed increases beyond best glide, your glide angle gets steeper. Say you are flying at best glide, you are looking through a specific point in ...
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### How do I calculate new minimal speed for a glider when I put water into the tank?

Lets say a glider weights 400kg and has a minimal speed of 70km/h. When it has additionally 100l water, so in total 500kg, what is the new minimal speed? I would argue, that in order to reach the ...
• 241
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### Why is polar curve of a glider dependent on flight load?

This is my first question here. I'm just a glider in education phase and not yet a pilot, but because I'm also physicist, I'm interested in some details more than other people. My question is simple:...
• 241
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