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Re:Imperial Airship Scheme by sevensor on Tuesday March 14, 2017 @03:48PM (#13870868)
Your intuition works differently than mine! The baseball's trajectory is ballistic, while an airplane actually stays aloft. The not falling out of the sky bit is the thing that still boggles my mind. I mean, demonstrably, it works, but that to me does not seem intuitive at all.
Re:Imperial Airship Scheme by bryondowd on Tuesday March 14, 2017 @05:38PM (#13871692)
Well, I was thinking purely about propelling an object that is heavier than air versus lighter than air.

An airplane only stays aloft as long as it is being propelled, after that, it's basically falling with style. Likewise, a lighter than air craft is just floating in the wind without being propelled, so the key is which is easier to propel, thus, it compares well to just throwing an object.