Posted for "Mark R Steitle" <mark.steitle@austin.utexas.edu>:

 As an ES builder, I usually just lurk on this list, but I couldn't help
 adding my 2 cents worth on the subject of pitot tubes.  Attached is an
 article by Eric M. Jones of the Periheliondesign.com web site.  He
 designed a pitot tube that uses Positive Temperature Coefficient (PTC)
 thermistors to automatically maintain a pre-determined temperature.
 (See attached copy)  The PTC thermistors are self-regulating, meaning
 that you turn it on and leave it on.  While I'm just a neophyte
 electronic tinkerer, I couln't help but think that maybe this technology
 could be applied to our Lancairs.
 
 Mark S.
 N208TX