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I found this online (and similar info in other places) about a spinning top. My emphasis. "The expression for precession angular velocity is valid only under the conditions where the spin angular velocity ω is much greater than the precession angular velocity ωP. When the top slows down, the...

I'm not seeing it in the videos, but I'm also only looking on my phone. I was thinking it sounds impossible for anything to affect nose angle so drastically in such a short time. The disc would have to be traveling sideways in order for precession to move the nose. But this led me to an...

@sidewinder22 Here's a thought. Imagine a disc spinning completely on edge like when you spin a coin on the table. It surely experiences significant drag which works to reduce the spin rate. There's a continuum between spinning entirely on-axis in a clean flight, through a bit of wobble, then...

I dunno... Funny things definitely happen due to any wind gusts later in the throw, when the disc really has slowed to around zero airspeed - but at the peak, where ground speed is zero, the airspeed is probably at least 20-30 mph because of the wind. You wouldn't want to try and set mta records...

An excellent point. I'd be astounded if he wasn't deforming it. I've seen pics of ultimate discs distorting when thrown, and whilst they're a bit bigger and less dense, they're also not thrown at 85mph. I can't find a good photo just now. I think the split-second distortion of a disc is...

Perceived distance increase was noted by Nick, from the simulator. Eric just agreed that it is possible for a particular throw to get more distance, if it previously didn't have optimal turn - but also made clear that he didn't have total faith in the simulator anyway. Personally, I'm convinced...

You may be, more generally, i couldn't say. 😅 But it's a safe bet that you're right on this one. There's no way that wobble, with additional drag, can add distance potential, unless perhaps the lift associated with wobble-drag was somehow way stronger than ordinary smooth-flight lift. Which...

I think Eric is saying that the examples of increased distance are simply because the wobble adds turn to a disc that otherwise wouldn't achieve a full flight - wobble might add distance for a given stability/hyzer angle/nose angle, but couldn't add extra maximum distance potential to an...

Just linking to this fabulous data in another thread.

Yeah - it's all fun stuff. I'm fairly convinced by the argument that dimples on the flat of the disc (like the raketen had) won't help a golf disc like they do a golf ball, because a disc is already so much more aerodynamic. But Eric's numbers here raise the possibility of a different kind of...

I lied, i actually do have a question, now that i think about it. We've talked a bit (not sure if in this thread or another) about the beating-in of a disc and what it is that might make it turn more. I wonder if this result impacts that discussion? A common theory is that the lip gets bent...

I don't have an awful lot to add to the conversation just now, but i couldn't let this pass without saying how completely incredible it is that you're doing this. Thank you! This is surely publishable research if you wanted to, right? I've never seen wobble dealt with properly in the literature.

Do you have a good clip, or ideally slow motion, of Calvin doing this?

Because you don't need thumb pressure, I used to actually get people to experiment with this grip for catching fast-flying discs in ultimate, because you don't need to correctly time the closing of the hand (or in this case, the timing of pressing with the thumb) as you would in other catching...

Ah, that was the kind of grip i was talking about way back up the thread. It seems to me that that would be an incredibly strong grip, even with very little thumb pressure, because the disc isn't trying to slide out of your grip upwards, towards the thumb, like it would in extension; it's...

Hmm, that might be a bad link, Feynman said it was half the spin rate. Anyway, the spin and wobble are tied i think.

I'm not sure i follow, but that might be me. For a free disc, the wobble has to go around the disc at double the spin rate, i believe. So i don't think it could go the other way? https://www.quora.com/Why-does-a-free-disk-wobble-twice-as-fast-as-it-rotates

I'm glad you said that, i was starting to think i was going mad when everyone was talking about negative wobble. I suppose you could try to argue that whether the very first part of the disc to hit the air after release was wobbling above the 'average' AoA or below it might have some tiny...

That would be my expectation of what wobble would do too, so in that sense i agree with the simulation. But I'd love to know if they have good data to back it up, or if they're just going with the received wisdom.

Hmm, scratch that, it looks as though they have added wobble to the simulation. I wonder what data they used to create that addition.