[FRIAM] Photos of popped balloon

[Tom Johnson]

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 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
> 505-453-4944 (cell)  http://www.cs.unm.edu/~angel
>
>
>
>
> On Jan 30, 2019, at 5:15 AM, Tom Johnson <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
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