Recent content by BenjiHeywood

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.

That's brilliant, thank you. And it's amazing that you get that sudden increase in lift at the end, flaring out, just because of the tail cross wind. Very interesting. I still think that aerodynamically-induced changes in pitch would have an effect, particularly at the margins. What did you...

Yeah - i don't think about the wrist either. What you and hyzerroc are making me realise is that i was describing what the wrist does from a physics perspective rather than a coaching perspective. I need to make some edits. I think of it more like the way many of us can have a very loose grip...

Unless they have done an update more recently, I don't think that's right. Michael told me that the simulator ignores wobble. I would expect, if they had found a way to simulate the effect of wobble, that they'd also make it an adjustable input in the simulator like the other metrics.

I'm still thinking about this stuff. Here's a thought - have you ever tried MTA (with an ultimate disc or some other glidey thing, probably a glitch would work)? Generally you'd throw into the wind, on hyzer but with the nose significantly up, and have it flip up to wings-level-ish and then...

That's how i see it too.

I think a lot depends on the angle of the finger-ends in flexion. Imagine if you could get right around the disc, with the first knuckle actually touching the underside of the disc (fingertips on the inside rim). It would be almost impossible for someone to pull the disc out of your hand. But...

Yeah - i definitely think that a lot of throws match pretty well with your data, including some pretty big throws like eliezra's. But I'm surprised that an optimised throw looks like that. Looking at your drift and height graphs side by side, the disc is moving a long way right before it...

Interesting, thanks, that makes me think i need to rewrite it. My point is really only about accelerating up to the end, not about having an especially stiff wrist. But i can see how the later parts of the article could be read that way.

I don't know any of the details, which are presumably proprietary. But i can at least imagine that if the accelerometers can measure precisely 9.81m/s/s for a short period of time then they can assume they're stationary, and then any additional accelerations they subsequently pick up can be...

It's just working out where zero speed is, so it can calculate the motion from there. Nearly everyone will have a stationary point before they start the walk up, or the pendulum backswing, or whatever their initial movement is. It's a rare person that takes a disc out of their bag and just walks...