Classic cars forum & vehicle restoration.

[Peter_L]

OCC Members are renown for their innovation and problem solving.

Is this video for real ? does it introduce physics that could be adapted ?

https://www.youtube.com/watch?v=2keRTbA2zAQ

[roverdriver]

It looks very simple and clever, Peter.

Obviously the oil conducts the heat to the water-cooled glass creating sudden uneven expansion and therefore cracking. I must try it some time.

Apart from 'cutting' glass, I can't think of another application.
_________________
Dane- roverdriver but not a Viking.

[Dipster]

It is the heat stress that cuts the glass. I have seen it done with a bit of wire heated up, paraffin soaked string tied around the bottle and ignited etc..

It is basically how our not too distant ancestors used whatever they had to had to improve their lives. Nowadays we pop up the shops....... I believe our ancestors must have been better, more resourceful, people than the present softy generations. Whinge over, sorry.

[petelang]

I heard long ago, fill jar with light oil then immerse a very hot soldering iron to do the same thing but the oil was in the jar, not outside it.