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by uggie
Tue Aug 11, 2009 11:57 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0620: "Wings"
Replies: 141
Views: 35450

Re: "Wings" Discussion

Randall the guy in your comic got this one somewhat wrong. He needs to remember pressure != density when looking things up on wikipedia (especially when the 3 T_{\text{Titan}} \approx T_{\text{Earth}}) . Using ideal gas law PV = NkT (k is boltzmann's constant, N is number of molecules) or densi...
by uggie
Fri Aug 07, 2009 11:48 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0620: "Wings"
Replies: 141
Views: 35450

Re: "Wings" Discussion

The physics is wrong. Lift=Weight or you go splat. The density of the atmosphere has nothing to do with that fact (unless you happen to be noticeably buoyant at those densities...). What does change is the velocity you need in order to generate adequate lift. Since the dynamic pressure goes as the s...

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