The liptest

Discussion in 'General Slingshot Discussions' started by zwillie, Jan 6, 2013.

  1. zwillie

    zwillie New Member

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    Hi,<br>today I had to make some new bandsets.<br>I had a tube of latex in my mouth ( I´m a person with just two hands <img src="http://illiweb.com/fa/i/smiles/icon_lol.gif" alt="Laughing" longdesc="7">) and while streching the tube, it heated up to more than 40°C I supposed.<br>So we often speak about this effect, but if you hold a strip of rubber to you lips and strech it you can <strong>feel </strong>the effect.<br>Hold it a while streched to you lips until it is cooled down to the environment temperature.<br>Let it loose and you feel that the rubber is much cooler than the environment.<br>This test works best with tubes.
     
  2. Arturo Borquez

    Arturo Borquez Administrator

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    that is because tubes are more isolated than flat band to exchange heat with the ambient, the inner circular section doesn't has much "air" it is almost isolated, so I would guess that tubes retains heat twice time a band does ... also when fired tubes will take more time to recover ambient temperature ie: with crossbows, unless a fast "adiabatic" shoot ...
     

  3. tokSick

    tokSick Senior Member

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    Holding a band between the theeth, stretching it with both arms and let go... good way for warming the face in no time in cold weather!!! <img src="http://illiweb.com/fa/i/smiles/icon_lol.gif" alt="Laughing" longdesc="7"><br>P.S: It works in warm weather too but it will be stupid to do so if the weather is already warm...
     
  4. JoergS

    JoergS Administrator

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    As I said, you could make a rubber powered fridge. Put 1/5 of a band inside the fridge and pull it out, then let it cool in stretched condition. Let it snap back afterwards. Repeat until the fridge has the desired temperature.
     
  5. onnod

    onnod Im from Holland, isnt that weird?

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    that would be smart and stupid at the same time <img src="http://illiweb.com/fa/i/smiles/icon_scratch.png" alt="scratch" longdesc="33">