Still no proof of Schuler Tuning? Ok, I'll check back later.
Why would I have to prove something irrelevant to the question? Hey, Why not have me prove that cows really have 4 stomachs, or that Lee Harvey Oswald shot JFK?
If it makes it easier for you, we can take this thread in two directions: we can imagine that I have presented evidence that shows Schuler tuning exists, and we can imagine the opposite: that I have showed evidence that it doesn't exist. We can then take the same steps forward from each of these different scenarios (we'll call them scenario one and scenario two) and see how they differ, OK? Think of it like two thought experiments.
Super.
In the scenario where you proved Schuler Tuning to exist, this meant for INS to work the earth must be round.
In the scenario where we found Schuler Tuning doesn't exist, it means that the earth must be flat for INS to work.
So as you can see, the conversation doesn't move on until you prove its existence. If it doesn't exist, earth's not round.
Glad we can both agree to follow this progression.
Let's look at each scenario in turn:
1. Schuler tuning is proved to existOn a round earth, INS would work nice and hunky dory. No problems. Gets you from A to B with no discrepancies.
On a flat earth, Schuler tuning would really screw things up and the INS would show all sorts of movements the plane wasn't really making, leading you to end up miles away from where you were meant to be.
So far so good, and agrees with Thork's post above, I think. Let's look at scenario 2:
2. Schuler tuning is proved not to existOn a round earth, the INS does not give correct readings as the movement around the curve of the earth throws it out, and you end up miles away from where you want to be.
On a flat earth, the INS gives absolutely correct readings of the vessel's movements and does not give any false readings.
That's how I see the two scenarios working for both round and flat earth, but I would like Thork to tell me if he agrees with my assessment so far, because I don't want to take things further if there are discrepancies that need clearing up.