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 31 
 on: October 17, 2018, 09:40:00 AM 
Started by paxl13 - Last post by Softspin
My thought is don't fix what is not broken , I gravitate toward fixed tip more and more ..have you ever tried a relampago 3D top from Jmadrigals  now there is a great fixed top

 32 
 on: October 17, 2018, 08:12:31 AM 
Started by the Earl of Whirl - Last post by the Earl of Whirl
Well, well, well!!!  I dumped out a big container of little finger spinners and guess what was in the middle of them all?  It was a bunch of Rascals that someone hid there!!!  Who knows how long they have been there.  It was probably from Mark Hayward's last visit.  I am most certainly going to have to put them under lock and key now.

The Rascals saga continues!!!

 33 
 on: October 16, 2018, 10:55:45 PM 
Started by MrYo - Last post by Watts' Tops
Great thread---MDF does not have strength enough for tough top spinning unless you make it solid. At this point it gets very heavy.  I use basswood now for most of my Watts' Tops.  The grain is quite consistent and the wood is quite durable.

 34 
 on: October 16, 2018, 10:48:05 PM 
Started by silvertop - Last post by Watts' Tops
It was fun to see the "vintage" Watts' Top posted again.  And yes, I still make a few Watts' Tops.  It has been so refreshing to see others making tops and how the art of spinning has grown, thanks much to this web site.  Thank you Tao.

 35 
 on: October 16, 2018, 09:14:30 PM 
Started by ta0 - Last post by paxl13
The spike top looks scary to throw!!! A LOT!!!

 36 
 on: October 16, 2018, 08:59:12 PM 
Started by ta0 - Last post by Ketzaltlipoka
Muy bien. ¡felicidades por este logró! espero leerla algún día. Algún día escribiré algo y haré alguna referencia a algún erudito del trompo que se parece mucho al señor Rajuela. je, je.... >:D

 37 
 on: October 16, 2018, 08:52:46 PM 
Started by ta0 - Last post by Ketzaltlipoka
¡vaya! nunca había visto este tema aquí. (casi no se nota que ya casi nunca vengo, je, je)
e encanta su imagen, su indumentaria. Davvero, ese mismo estilo de sombreros es uno de los que uso para ponerme ahí el trompo. No creo que el me lo haya copiado. Nunca he subido ese truc a internet. Sólo que alguien me haya grabado y lo haya subido y el lo haya visto. también es muy posible que uno y otro lo hayamos descubierto sin saber nada del otro. Aunque con un sombrero estilo texano también se puede y hay mucha mayor vistosidad y surtido.

 38 
 on: October 16, 2018, 08:33:41 PM 
Started by peonza - Last post by Ketzaltlipoka
!Hola!
Hace ya muchos años revisé tu página de peonzas, y ahora que veo que acabas de entrar a esta web, he vuelto a revisarla. Aquella ocasión no noté algo que hoy sí. La información acerca de que Sor Juana escribió acerca del trompo e incluso, (si mal no entendí) jugó con trompo. Muchas gracias por este aporte.

 Por cierto, es más lindo ver México con X. La pronunciación real es Méshiko (con el sonido más fuerte que el sonido de c), pero casi nadie lo sabe. Gracias por el aporte de esta página, contiene información extraordinaria. !Felicidades! y adelante.
 Y por cierto, buscando tu web, me encontré con esto:

https://www.youtube.com/watch?v=BBu3lUxi4f4

Siendo una película en inglés, seguramente, ya alguien anteriormente lo mencionó en este foro.

¡Hasta pronto!

 39 
 on: October 16, 2018, 07:54:56 PM 
Started by ta0 - Last post by ta0
The Spider from Cometa has a spiderweb in relief (on the outside surface) spiraling over the whole body, plus a spider sticking out on the crown.
Of course, the break of the surface of revolution (and radial symmetry) is minor.





My spike top (at the height of the spikes) is not a surface of revolution but has radial symmetry:



Of these 4 antique whistling tops, the two on the left have three holes (so, radial symmetry even if the surface revolution is broken at that height), while the two on the right have just one hole and thus no symmetry.


 40 
 on: October 16, 2018, 05:03:10 PM 
Started by ta0 - Last post by Jeremy McCreary
However there are some throw tops with a slight non-revolving relief on the wrap area, like a few Mexican plastic tops.
Outside the wrap area there are some more extreme cases (like my spike top).
If you are looking for throwing tops not just without a surface of revolution, but also without radial symmetry, again there are plastic Mexican tops with relief patterns on the crown.

Thanks for the examples, ta0, but I'm not following the geomety. Any photos?

If not, think of each top as an oddly shaped planet with the intended ground contact at one pole and the other end of the intended spin axis at the other pole. On the top's outer surface, then draw meridians from pole to pole and parallels perpenicular to the meridians.

How are the meridians and parallels shaped? In a "top of revolution" like a peg top, the meridians are identical in size and shape, and the parallels are circles of various sizes centered on the spin axis.

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