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 61 
 on: February 12, 2018, 07:35:42 AM 
Started by yoyospin - Last post by Turegano
woooooooow  its a beutiful   ;)

 62 
 on: February 12, 2018, 02:13:13 AM 
Started by Aerobie - Last post by Iacopo
"When the Cg is very low, as in my tops with a recessed tip, the top rises relatively fast, (a few minutes), even if the tip is spiked."   In this case, it the Cg above or below the tip?

The Cg is above the tip, by maybe 1 mm.
I also tried with the Cg slightly below the tip: at high speed the precession behaviour is similar, but precession happens in the opposite direction of that of a top with Cg above the tip.  In both cases the top rises generally in a few minutes.
At very slow speed, with Cg below the tip, the top tends to rise spontaneously.

Your observation of tops with higher Cg that rise faster is interesting.  I still have much to learn.

 63 
 on: February 11, 2018, 10:40:20 PM 
Started by Ludo - Last post by ta0
There were many spinning top table games spread throughout the venue for people to try. Here is a video of many, but not all. Ludo has amassed a great collection.

(Note: at 2:15 there is an old original game, Le Pass du Toton, that has a cartoon "blackface". I hope it's not offensive to anyone.)



I'm sure this will give some ideas to Mike  ;)


 64 
 on: February 11, 2018, 09:12:51 PM 
Started by Aerobie - Last post by Aerobie
I made a 1.75" diameter wheel with setscrews to move it up and down a shaft.  With very high Cg, it recovers from a deliberate disturbance to vertical, stable spinning more quickly. 

The high Cg makes it harder to twirl and shortens the duration due to increased minimum RPM.  But it does recover more quickly.

Alan

 65 
 on: February 11, 2018, 08:35:28 PM 
Started by Beylon - Last post by Beylon
50% funded in the first 48 hours!

Well, the relaunch is on track. You can see the progress at the Kickstarter page. And I have some awesome news: the updated Power Unit has arrived!


It works the same as always but is slightly wider, with a larger feeder and finger-grips for a stronger hold. A little enhanced functionality never goes astray, I reckon.

 66 
 on: February 11, 2018, 07:13:47 PM 
Started by the Earl of Whirl - Last post by Attila
Try finding a place like this:


It worked well for Loon-Plage Festival  ;) ;D

 67 
 on: February 11, 2018, 07:07:05 PM 
Started by ScottR - Last post by ta0
Just a random thought I have had a couple times. Wouldn’t it be pretty RAD to have a wood Giulia or STB sitting on the shelf or spinning on a string. Just thought.

How do you say wood in Italian? Answer: legno
Thanks to Eric:

Giulia di legno
Guilia di Legno Tre, Quattro e Cinque
Giulia di legno sette, otto, nove, dieci ed undici

Rad, indeed!  Ask Neff! ;)


And they play as well as the originals!  :o  8)

 68 
 on: February 11, 2018, 06:49:59 PM 
Started by Aerobie - Last post by Aerobie
"When the Cg is very low, as in my tops with a recessed tip, the top rises relatively fast, (a few minutes), even if the tip is spiked."   In this case, is the Cg above or below the tip?

Regards,
Alan

 69 
 on: February 11, 2018, 04:40:01 PM 
Started by paxl13 - Last post by paxl13
Dale's answer is "NO". If anyone has any idea on how to achieve it! Lets chat about it here!

 70 
 on: February 11, 2018, 04:31:39 PM 
Started by Aerobie - Last post by Iacopo
This is something I have to think about.
I can confirm that pointed tips have little righting effect, compared to ball tips.  Still there is some righting effect in them because even when they are sharp, their contact points are never exactly an infinitesimal point but they are always at least a bit rounded, so they behave like tiny balls. 
When the Cg is very low, as in my tops with a recessed tip, the top rises relatively fast, (a few minutes), even if the tip is spiked.

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