Salamand
@Salamand@lemmy.today
- Comment on Anon visits a guy's house 6 days ago:
told my wife and she told her sister
- Comment on Anon isn't fooled by planes 2 weeks ago:
A common misunderstanding. Boats (made of rock) float due to gravity pushing the water up (as it bounces off the earth). Boats made of feathers (ducks) harness the same principle, as they are also filled with water.
- Comment on Anon isn't fooled by planes 2 weeks ago:
But… right-side-up, the plane fights gravity, has upward lift, according to Bernoulli principle. And even if we angle the flaps to decrease altitude, it’s still not dropping like a rock, the wings still generate lots of upward lift.
400 ton plane, wings w 400 ton lift = flight
Now (before engaging flaps) those same wings upside down would be generating downward “lift” PLUS pull of gravity. So now the 400 ton plane is like an 800 ton plane. Can the flaps alone lift that? Or, said another way, if we gave the plane flat wings, no Bernoulli, and stacked another plane on top of it (to make 800 tons), could it fly right-side-up just using flaps?
- Comment on Anon isn't fooled by planes 2 weeks ago:
But then how can they fly upside down?