Hello,
                I'm new to this group and have a question I would like to ask.
My name is
Conrad Trevelyan and I am a PhD student at Loughborough University.

        I'm not sure if this question is applicable to this discussion group or
not. Apologies if it isn't.

        I am interested in being able to open and close an orifice progessively
to
a maximum size of something in the region of 5mm in order to allow a stream
of air to be throttled. It has been suggested to me that a piezo-electric
device(s) maybe able to meet this spec. Firstly, am I at the right place
and if so, does anyone here have any ideas, pointers or suggestions?

Many Thanks in advance,

Conrad

********************************************
Conrad Trevelyan                           Email to : c.trevelyan@lboro.ac.uk
CREST
Angela Marmont Renewable Energy Laboratory
Loughborough University
Leicestershire                             Telephone : 01509 228140
LE11 3TU                                          Fax.: 01509 610031
United Kingdom
http://www.lboro.ac.uk/departments/el/