Bungay Balls up 2012 - Countdown starts now!

The Void - 2012-04-27 13:53:55 UTC - Parent #

Edge event page: https://jugglingedge.com/event.php?EventID=16 Add yourselves if you're coming!

charlieh - 2012-04-27 14:05:03 UTC - Parent #

Oh and #bbu13 is meant to do something twittery like with linkage...

Little Paul - 2012-04-27 14:05:30 UTC - Parent #

Oh, and I'LL BE THERE!!!!

Dee - 2012-05-01 14:19:31 UTC - Parent #

After a trebuchet came up in conversation at the pub last night we got around to discussing doing a small project along the lines of this https://youtu.be/GU3fOeDctbY in Bungay this year. Disposing of a baking tray of cornstarch/water isn't nearly the same problem as a paddling pool full of the stuff.

Excited to be going to her first Bungay!

Orinoco - 2012-05-01 16:35:08 UTC - Parent #

A few years ago in the sauna Charlie asked for suggestions of what to do next year. I suggested filling a sheep trough with corn flour & water.

I've heard that it is possible to form juggling balls with this stuff & juggle, then when you stop they turn to liquid & drip through your fingers.

Dee - 2012-05-01 17:14:22 UTC - Parent #

We discussed this idea - then decided that we were more likely to do something on a scale that wouldn't be so difficult to dispose of.  We also have to remember, that although we've just had the wettest May on record, we're still in a drought, so we don't want to waste too much water...

fak - 2012-05-02 08:20:49 UTC - Parent #

You mean like this (the first video hit for non-newtonian juggling that came up when I searched).

https://youtu.be/aJtCkhj31rY

Dave Cheetham - 2012-05-02 13:33:50 UTC - Parent #

Yeah, I saw that one.  And that stuff looks a lot more solid than the water/cornstarch mixture that I've played with in the past.  That's why I was wondering if anyone had actually tried it themselves, and might have said something like "Yes, it works.  But you need to make a denser mixture than normal."  Or something like that.

Dave Cheetham - 2012-05-02 13:38:43 UTC - Parent #

Correct me if I'm wrong (I very well may be), but I always assumed that the reason that water "droplets" stayed together was that the surface area to mass ratio was high enough that the surface tension was stronger than the inertial forces acting on the contained water.  Then, the reason that water "blobs" (or anything larger than a "droplet") split into "droplets" as they passed through the air was that the inertial forces were stronger than the surface tension, so the water blob broke up until the ratio equalised.  Is this not the case?

I'd wondered whether a similar thing might happen to the cornstarch/water mixture.

Cedric Lackpot - 2012-05-02 13:59:27 UTC - Parent #

"Correct me if I'm wrong ..." - I'll just correct you regardless, thanks ;-)

On the few occasions I've played with very small amounts in the past, a cornstarch mixture strong enough to become thixotropic is quite gloopy compared to water, and is likely to want to hang together even when unstressed. What with it being starch and all. But I don't recall having thrown any.

The weirdest thing is dragging a teaspoon through it slowly, when it's like thin custard (not surprising really), but as you up the speed there's a fairly well-defined tipping point when drag on the spoon spikes sharply and it just feels so ... different. Fascinating stuff, worth playing with.

^Tom_ - 2012-05-02 16:31:47 UTC - Parent #

I know folks who played cricket with a cornstarch/water mixture ball. I can't find videos at present, but I think one exists.