I see them as correct but I think the axis and rotation arrow are influencing the way I view the pitcher itself. It doesn’t really matter though because all you need to do is picture a real door or a real pitcher to visualise the rotation. The diagram itself is not well drawn but it’s not the diagram that is the memory aid, the memory aid is visualising the way a door rotates and the way a pitcher rotates.
So what we have is an overly convoluted, poorly drawn “memory aid” that only works as intended if you ignore one third to half the information presented (the cat, or the cat and the axis/rotation arrows) and happen to be from Boston? Very peculiar (pronounced “peh-k’yule-yuh” in keeping with the yaw/door rhyme scheme).
I’m in the midwestern US, so they don’t. I guess that’s a large part of my confusion. I couldn’t see how one was supposed to help remember the other.
Boston isn’t the only accent in the world in which door and yaw rhyme. Not everything is about the US of A you know.
It must work for some people or it wouldn’t exist. Like many things, if it exists and you don’t understand it, you probably aren’t who it’s for.
Sorry, for some reason I thought you were British.
The door/yaw is obvious when those words rhyme. For me and many other people they do.
Well the idea is to find an example that is only able to be the same rotation…
How about bad examples… a car runs up an embankment. Well it could spin, it could flip end to end, or flip so that what touched the ground was wheels, left door , roof, right door, wheels, left door, roof. But sometimes we say flip or roll for end to end, and flip or roll over the doors… So thats a worse example… how does a car crash on an embankment ? all depends.
So lets check the given examples.
Pitch, baseball pitcher tripping over due to throwing too hard… or diving off a diving platform
… pitch (as in trip forward… ) has the meaning of tripping …its not usual to use a “pitch” to mean go out of control in a sideways or spinning action. its used to refer to forward roll/dive. And well, pitch on a plane will make you dive and speed up … and have to consider the trajectory ( pitch forward … down… will be a good way to be aiming at something solid ) . So is there only one way for a pitcher tripping to pitch ? yep.
Yaw, like the way a door opens… yaw rhymes with door … also the rudder works like door. is there only one way ? yep.
roll, a cat roll … well how does a cat get itself upright ? hold the cat upside down and drop it. its not going to do a forward or reverse roll, its not going to “pitch”… its going to do a longitudinal roll… so is there only one way ? yes.
No bad examples found.
Mere existence is one thing. Being in Wikipedia is another. This illustration might be at home on the whiteboard at some New England sailing school, but not Wikipedia.
Except a cat can pitch and yaw, too. And it’s not really clear what position the cat is going to/from. Honestly, I don’t see what’s unclear about illustrations using a plane or a boat.
Sure, but to the people for whom this aid works it probably seems obvious and entirely appropriate to be in Wikipedia.
Personally I think the problem is that specific picture, not the memory aid itself.
The cat picture is terrible. It would be better being a dog rolling over on the ground. Most people have a clear idea of what that looks like.
Because they don’t help you remember the information, they are the information. I don’t see why you can’t just have this diagram to illustrate left and right, L ---------- R, but lots of people need more than that.
I suppose that my username does have a British sound to it but it’s just a name that came to me in a dream once. I liked the sound of it and I’ve used it ever since.
Looks vaguely Scandinavian to me.
Yeah I’m not sure why I had that impression.
When I read the OP, before clicking on the link, I was thinking of the guy who stands on the mound & throws a baseball to the batter; I was totally confused
Next stop Van Koitlan Pock! Stan’ clear da clozen daws!
Agreed. I think the idea is that a cat might roll over deliberately, whereas a pitcher or door are unlikely to do so. Still weak.