Throws per Minute
blobby
I was recently having the idea to measure my Bpm rate when juggling 5
balls with a metronome. So I thought some of you would also have fun
doing it and posting your results here. I would be glad to see a lot 5
balls and of course some 6 and 7 balls here. So just juggle a cascade
or fountain and try to put the metronome to the right bpm rate. Ok,
those who can juggle their 5+ ball cascade for >= 1 minute they can
just count. I can't..., yet. :p
blobby
Ahm, I forgot something. I measured that my 5 ball thows are
approximately between 252 and 264 bpm.
And if u don't have a metronome you can use www.metronomeonline.com.
gantenbein
Hi!
I think with ~275 bpm I'm at the upper end of the (bell?) curve.
Steffen
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Draitube
I'm on the quite fast end.
I am doing my A level coursework on this, and I have produced some quite
interesting results. I will post it once it's finished.
I measured heights, of different numbers of balls, at different tempos,
from which I obtained time in the air (suvat), which then allowed me to
work out the hold time (the difference from 60/bpm). One assumption I've
found quite common within models of juggling is that the hold time is
roughly constant at 2/3 of a beat, but I've found that it really is
variable, based on the number of balls and the tempo.
J
Boppo
Clubs give an especially easy way to measure the dwell ratio ( = hold
time/ period) and that is the angle of the clubs with respect to one
another. It just happens that with a five club doubles cascade, and
with a seven club triples cascade, that at dwell ratio = 1/2, the
clubs all line up anti-parallel to one another. Based on how many
still pictures I've seen of five and seven club patterns (including my
own) I'd say dwell = 0.5 is pretty common.
FWIW five clubs singles gives 90 rotation between adjacent throws at a
similar dwell (which I don't recall exactly). But look at the WJF logo
and you can tell that's the pattern.
If you want to see the derivation, look in my Physics of Juggling
article in The Physics Teacher, back in Nov. 1987, IIRC.
-boppo
Adam Rowney
blobby
Dave Cheetham
Draitube
whether these considerations are significant, but do people really catch
clubs in the same position as they throw them, because as an occasional
(bad) club juggler, I find it common to catch clubs slightly before it
does a full spin, etc. I don't know whether or not it makes a big
difference though, probably not.