01 February, 2012

Stress Patterns

Here are some more pictures taken at the ASE show. 
These show the stress patterns which are visible in our set square after it is exposed to polarised light, for these images we have used a polarised light source from a standard LCD computer screen instead of our normal lightbox.

The LCD screen has a polarising film in it at 45 degrees to the vertical so only a single sheet of polarising film is needed to produce an effect.

Set square with out Polarising Film.

Stress patterns within the set square viewed through a sheet of Polarising Film.

10 January, 2012

Demo of the Stirling Engine

video

A short demo from our stand at the ASE exhibition in Liverpool last week.
This is our model of a Stirling Engine, which is running from a cup of hot water. 
This model is mostly made out of cardboard with a few metal pieces.