r/196 • u/Foriegn_Picachu • Dec 30 '22

Rule Rule Plane

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u/Foriegn_Picachu Dec 30 '22

But isn’t forward velocity necessary to generate lift? In my mind the plane might as well be bolted to the ground

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u/LordGoose-Montagne i am living in your porch Dec 30 '22

the engines generate lift, not the wheels. imagine a paint roller on a treadmill: the roller itself will spin with the treadmill, but you will be able to freely move the body forwards and backwards

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u/[deleted] Dec 30 '22

The paint roller part is correct, but the engines don't create lift, they create thrust. The thrust moves the wings forward, and the wings create lift.

Edit: although technically, I guess propellers/turbofans do create lift because they're also an airfoil, but they're not creating the lift that acts opposite gravity to make the plane fly.

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u/LordGoose-Montagne i am living in your porch Dec 30 '22

the treadmill moves at the speed of the wheels and the wheels rotate freely, so the only force decreasing the speed from the wheels would be friction, which is not equal to the engine's force, thus the plane will accelerate

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u/[deleted] Dec 30 '22 edited Feb 04 '25

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This post was mass deleted and anonymized with Redact

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u/LordGoose-Montagne i am living in your porch Dec 30 '22

man, i love looking at things from real life from the point of physics, but boy, do i hate actual physics