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If a vortex transports air in a spiral staircase fashion. Then there will be periods where the vortex flow will travel towards a reference object, and periods where it moves away from said object.

If you have a vortex underneath the length of a surface, then at one point the vortex is pushing air up towards and against the surface, and at another the vortex is moving down and away.

That means that a vortex traveling down a surface can impart a cyclical up and down momentum on that surface if the vorticity is strong enough. The upward momentum of the vortex pushing up then the downward momentum pulling back down.

https://www.youtube.com/watch?v=1I2SlU0SYsQ

If a vortex transports air in a spiral staircase fashion. Then there will be periods where the vortex flow will travel towards a reference object, and periods where it moves away from said object. If you have a vortex underneath the length of a surface, then at one point the vortex is pushing air up towards and against the surface, and at another the vortex is moving down and away. That means that a vortex traveling down a surface can impart a cyclical up and down momentum on that surface if the vorticity is strong enough. The upward momentum of the vortex pushing up then the downward momentum pulling back down. https://www.youtube.com/watch?v=1I2SlU0SYsQ

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[–] • 2 pts (edited )

Not making up words. They're in english, git gud nigger.

Impingement = smacking into, like your daddy should have done on your backside.

[–] • 1 pt

The original machine has a base-plate of prefabulated amulite, surmounted by a malleable logarithmic casing in such a way that the two spurving bearings were in a direct line with the pentametric fan. The latter consisted simply of six hydrocoptic marzelvanes, so fitted to the ambifacient lunar waneshaft that side fumbling was effectively prevented. The main winding was of the normal lotus-o-delta type placed in panendermic semiboloid slots in the stator, every seventh conductor being connected by a non-reversible tremie pipe to the differential girdlespring on the "up" end of the grammeters.

-Albert Einstein

[–] • 1 pt

Imagine a spinning rotor blade, as the blade moves through the air, it pushes air down, lowering the pressure above the rotor. At the tip, the high presssure seeks low pressure above the blade and produces a wing tip vortex. The flow at the tip rolls up then around, then down, effectively pushing down(downforce) on the rotor blade tip, instead of pushing up(lift).

But that's not all, the rotor is spinning so the next blade is going to interact with that vortex. The spinning vortex is still circulating in the same direction, down away from the rotor, then up then reversing towards the rotor, and finally flowing downwards. That means the next rotor is running into air that's going downwards which in practice, reduces the effective angle of attack of the rotor blade. That means that in order to get the ideal lift means you need a greater angle of attack, which increases drag.

[–] • 1 pt

White man science be close to Witchcraft