Sorry, it is not a fact that water spirals opposite in each hemisphere. It has much more to do with how the drain is built.
The Coriolis effect theory has a lot of holes in it. It explains one set of circumstances, but doesn't explain others. There are many facts that contradict it. Like, if the Coriolis effect actually existed, we would have an easy to build perpetual motion machine.
There are many flat earth theories that explain cyclone behavior better.
And there are many other world shape theories, that would also explain it.
So, I do not agree with your premise, and I do not agree with your conclusion.
If we built a machine powered by the Coriolis effect, it wouldn't be a perpetual motion machine. It would be powered by the Earth's rotation, which means it would be draining the Earth's angular kinetic energy. It would be like saying that a sailing ship is a perpetual motion machine. Sure, we don't have to burn fuel to make it move, but it's getting its energy somewhere (from the wind in this case, which means in part that it's getting its energy from the Coriolis effect).
Your argument:
Premise 1: perpetual motion machine is impossible.
Premise 2: if Coriolis exists, then perpetual motion machine would be possible.
Ergo, Coriolis effect does not exist.
I disagree with your Premise 2, so I disagree with your conclusion.
I disagree with your premise 1. (and premise 2 is improperly formed)
If the Coriolis effect existed, it would be easy to build a device to pull energy from it. Since there is no such device working (and it has been tried), the Coriolis effect theory is incomplete, or is wrong.
Yes, it may not be a permanent perpetual motion machine (millions of years) but it would continue to run for the rest of our lives, easily.
I'll write up my thoughts on this at some point. This clearly deserves some more thinking. The answer that first springs to my mind: the reason the Coriolis effect isn't useful for power generation is that the forces are too small on useful scales, but I shouldn't make any bold claims about this until I have some calculations to back this up. If we could build a 1000-km-wide rotor, I suspect the Coriolis "forces" on it would be enormous. The same forces are minuscule on a 100-foot-wide rotor, and are easily overcome by friction and drag. I suspect.
But if you'd like to know more about the math behind the Coriolis effect, follow me and eventually you'll see my analysis pop up.
I would love to see any conclusions that come up. Any speculations too.
The coriolis effect may exist for storm sized things, and the bathroom sink thing is just an urban myth. And if so, then it would be hard to make something to measure it. It could also exist for the same strange reasons Jupiter has a red spot.
If the coriolis effect does work at a bathroom sink scale, then we should easily be able to measure the forces involved. And thus, one of my reasons for not believing in the theory.
The Coriolis Effect/Force is not a real force. It simply arises from having a coordinate frame that rotates. For the rotating frame of the earth, the effects are small, and only apparent over long distances (e.g. the Paris Gun and ballistic trajectories, the diameters of hurricanes, etc.). They can become more readily apparent if we obtain another coordinate frame that rotates on a small scale, such as a tilt-a-whirl, as demonstrated in this video: (vimeo . com/110882577).
Since the Coriolis effect isn't a real force, and is simply an effect of a rotating coordinate frame, no energy can be extracted from it.
I used to be in the Army, field artillery to be specific, and we had to use different calculations for different locations on the earth in order to impact targets effectively. The ballistic equations used to calculate projectile flight path included corrections for the Coriolis effect and the corrections had to be different for each place on Earth you were firing from.
I have done this hundreds of times with great success, so I'm pretty convinced to Coriolis effect is legitimate. This, for me, is one of the biggest hurdles in buying into the whole flat earth conspiracy.
Also, what's powering Google earth, cell phones, and all other GPS devices. I've personally used a GPS device with great success on two continents which doesn't seem possible without satellites orbiting the ball earth in low orbit.