From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: Lancair 320  Fire 
To: lml
Date: Mon, 29 Jan 2007 22:07:16 -0500
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Posted for "Steitle, Mark R" <mark.steitle@austin.utexas.edu>:

  Chuck,
  Yes, I do believe I've got it covered.  I can see your point though.  If
  the exhaust is hidden behind and under the engine, the UVtron would have
  trouble "seeing" the fire until it was a full-blown emergency.  My
  situation is a little different as my exhaust headers all exit straight
  out the left of the engine (Mazda 3-rotor) and then down and back,
  exiting through the tunnel.  The UVtron, which has a 180* viewing angle,
  directly faces the exhaust system since I rationalized that if there was
  a fire under the cowl, it would most likely start in the vicinity of the
  exhaust system.  If there is a crack in the exhaust, the flames would
  start escaping out through the split and the UVtron would alert the
  pilot within a second or two.  If for some reason the flames aren't
  visible through the crack, then the crack would most likely continue
  getting bigger until the UVtron was able to "see" a wisp of flame
  peeking out through the crack.  It really doesn't take much flame to
  trigger this device.  The UVtron can "see" a flame the size of a match
  from across the room.  So, it doesn't take much to get its attention.
  It sure beats the fire warning system I had before (nothing).
  
  Thanks for asking...
  
  Mark S.