[FRIAM] Photos of popped balloon

[Edward Angel]

Yes. Cylinders not Spheres. Once I had lathed the wax and electroplated the copper shell, I put the heat back up in my vat and the wax melted and the cylinder slid off, They then crushed my precious cylinders I had worked so hard to make.

Ed
____________

Ed Angel

Founding Director, Art, Research, Technology and Science Laboratory (ARTS Lab)
Professor Emeritus of Computer Science, University of New Mexico

1017 Sierra Pinon
Santa Fe, NM 87501
505-984-0136 (home)		 	angel at cs.unm.edu <mailto:angel at cs.unm.edu>
505-453-4944 (cell) 				http://www.cs.unm.edu/~angel <http://www.cs.unm.edu/~angel>
							 	



> On Feb 4, 2019, at 9:00 PM, Barry MacKichan <barry.mackichan at mackichan.com> wrote:
> 
> I think they were cylinders, not spheres, so there were two holes. This is where we start talking about homology groups.
> 
> --Barry
> 
> On 2 Feb 2019, at 12:56, Tom Johnson wrote:
> 
> How did the melting wax exit the sphere? Probably a hole. So how did you patch the hole to retain perfect symmetry
> T? 
> 
> On Fri, Feb 1, 2019, 10:03 PM Edward Angel <angel at cs.unm.edu <mailto:angel at cs.unm.edu> wrote:
> For two summers while I was an undergrad I worked on a crack propagation project that was using high speed photography to image crack propagation on thin seamless  18” copper cylinders. During the first summer, I made the cylinders by first making solid wax molds that I lathed to the right shape. I then electroplated copper on them before melting the wax away. The second summer I worked on the photography side which was right out of Muybridge.  The film was in a 6 foot in diameter ring. In the middle was a spinning prism at the end of a turbine which sent the light around the ring of film. The whole thing was triggered by the crack breaking a small wire. We all had to hide behind a barrier during each run as the whole assembly 
> was pretty delicately balanced.
> 
> Ed
> ____________
> 
> Ed Angel
> 
> Founding Director, Art, Research, Technology and Science Laboratory (ARTS Lab)
> Professor Emeritus of Computer Science, University of New Mexico
> 
> 1017 Sierra Pinon
> Santa Fe, NM 87501
> 505-984-0136 (home)		 	angel at cs.unm.edu <mailto:angel at cs.unm.edu>
> 505-453-4944 (cell) 				http://www.cs.unm.edu/~angel <http://www.cs.unm.edu/~angel>
> 							 	
> 
> 
> 
>> On Jan 30, 2019, at 5:15 AM, Tom Johnson <tom at jtjohnson.com <mailto:tom at jtjohnson.com>> wrote:
>> 
>> See https://www.nytimes.com/2015/11/23/science/a-side-serving-of-science-for-your-next-birthday-party.html?smid=fb-nytscience&smtyp=cur <https://www.nytimes.com/2015/11/23/science/a-side-serving-of-science-for-your-next-birthday-party.html?smid=fb-nytscience&smtyp=cur>============================================================
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