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Author Topic: Breaking the 3-minute barrier: Spinjitzu tops  (Read 2488 times)

Jeremy McCreary

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Breaking the 3-minute barrier: Spinjitzu tops
« on: March 22, 2017, 01:24:59 PM »

Finally managed to break the 3-minute spin time barrier with a LEGO finger top like this...

https://www.youtube.com/watch?v=zBQ6oT241WI

My best hand-twirled run of 192 sec (3:12, not in video) was put in by the top below on a shallow biconcave lens lubricated with forehead oil, as Aerobie taught us.



I call these "Spinjitzu tops" because they take advantage of one of the few LEGO parts with a metal weight inside -- the Spinjitzu spinner, really a weighted turntable.



You can see how the spinner was originally meant to be used at 0:33 in this sample of the Spinjitzu game, LEGO's answer to Beyblade ca. 2011-2012.

https://www.youtube.com/watch?v=l4mq6iiMV7E

Spinjitzu warriors were well-designed to inflict mayhem, but they hardly qualified as tops: Spin times were usually under 10 sec, the wobbling was horrible, the travel was erratic, and they couldn't really fall over with the intended tip.

I fixed all that by keeping the weighted spinner and replacing everything else. Details on blog page.

« Last Edit: March 26, 2017, 11:35:53 AM by Jeremy McCreary »
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Playing with the physical world through LEGO

jim in paris

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Re: Breaking the 3-minute barrier: LEGO Spinjitzu tops
« Reply #1 on: March 23, 2017, 03:11:16 PM »

hello Jeremy

your mod really makes a difference!

it's fun to see your tops parading while the stock models collapse after 10 sec  ;D

thanx for showing

jim

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Iacopo

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Re: Breaking the 3-minute barrier: LEGO Spinjitzu tops
« Reply #2 on: March 23, 2017, 03:50:44 PM »

Jeremy, you have made a relaxing video.  It is nice to see many tops together, and fun to see which one topples down last.
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Jeremy McCreary

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Re: Breaking the 3-minute barrier: LEGO Spinjitzu tops
« Reply #3 on: March 25, 2017, 01:23:50 AM »

jim and Iacopo: Thanks -- glad you enjoyed the video. My favorite segment starts at 2:45. Thought for sure the red top was a goner and never expected the black and white top to be the last of the 3 to fall. And it all unfolded so slowly but so unpredictably -- kinda like OJ Simpson's famous slow car chase. Maybe I should have called them OJ tops.
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Jack

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Re: Breaking the 3-minute barrier: LEGO Spinjitzu tops
« Reply #4 on: March 25, 2017, 09:54:06 PM »

this impresses me, i dont know how you make those spin so long @-@
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Jeremy McCreary

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Re: Breaking the 3-minute barrier: LEGO Spinjitzu tops
« Reply #5 on: March 26, 2017, 02:46:34 AM »

this impresses me, i dont know how you make those spin so long @-@

Thanks, jack! The main reasons: (i) The metal weight LEGO hid inside the widest part of the rotor. (ii) Very low center of mass. Good aerodynamics and a low-friction tip also help.
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ta0

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Re: Breaking the 3-minute barrier: Spinjitzu tops
« Reply #6 on: March 26, 2017, 12:12:12 PM »

Good times, in more than one sense.

I wouldn't be able to spin that many finger tops without doing upside-down throws. But I guess that is left for the high center-of-mass video  ;)

I am flying from Denver to worlds. We'll throw some string Lego tops then   >:D
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cecil

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Re: Breaking the 3-minute barrier: Spinjitzu tops
« Reply #7 on: March 26, 2017, 07:07:50 PM »

You are making some BEAUTIFUL finger spin tops. But I love the fighters.
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Jeremy McCreary

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Re: Breaking the 3-minute barrier: Spinjitzu tops
« Reply #8 on: March 26, 2017, 08:26:38 PM »

Good times, in more than one sense.

I wouldn't be able to spin that many finger tops without doing upside-down throws. But I guess that is left for the high center-of-mass video  ;)

Thanks, ta0! After you've made over 700 LEGO tops and tested most of them many times to get the spins just right, you develop some skills. I posted the promised high-CM top videos here last night. All the spins were overhand there, too.

One reason I generally prefer overhand with my tops is that I can keep the plastic tips from getting dented by keeping the tips on the ground during twirls.

I am flying from Denver to worlds. We'll throw some string Lego tops then   >:D

Excellent! I really hope we can connect then. When will you be coming through?
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Jeremy McCreary

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Re: Breaking the 3-minute barrier: Spinjitzu tops
« Reply #9 on: March 26, 2017, 08:33:17 PM »

You are making some BEAUTIFUL finger spin tops. But I love the fighters.

Many thanks, Cecil! Have to admit, the Spinjitzu fighters are pretty cool -- especially in slow motion. They're also very well designed for their intended purpose.

I'm working on some Spinjitzu-like battle tops that use the same weighted turntables but replace the LEGO minifigures and gory weapons with better balanced gizmos that make contact by expanding under centrifugal force.
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