Ok, I hate to sound dumb here, but this chart is way over my
   head.  I'm
        sure it provides everything I need to know, but I don't know what
        questions to ask of the chart.  To start, is there a problem
   with the
        displacement shown on the turbo spreadsheet?   The spreadsheet
   says that
        the 13B displacement is 159.6 cubic inches.  That sounds way to
        high.  I
        looked up the displacement in "cubic centimeters" and converted it:
        13B = 1308 cc =  79.788 cubic inches
        20B = 1962 cc = 119.682 cubic inches

        I'm in Dallas and do most of my flying in 90-100 degree F.  My
   field
        altitude is 600ft.  I usually fly under 15k altitude.  I just
   want to
        know how to select a turbo that will help me maintain 350 hp up
   to about
        18k altitude on those hotter that hell Texas Summer days.  Can
   anyone
        give me the "Cliff Notes" or "Turbos for Dummies" version
        Don

        No Don it is indeed 159 c.i. equivalent. The three rotor is 240
   c.i.
        roughly. That is how much air they pump in one rev at 100% VE. I
        am not sure which spread sheet you are looking at but it is
   probably
        Dave Leonard's. Can you help Don out Dave?

        You will also need that Turbochargers book Don. I hope you save
        messages :)

        Paul Lamar


   Eh yeah, Im not going there... that is too close to the old "is it a
   4-piston, 6-piston, or 2-piston equivalent?"  :-)

   Lets just use 159 c.i. and leave it at that  :-)

   (ok, each chamber is used once per rev instead of once every other rev
   like in a typical piston engine... so double the equivalent volume)

   --

   David Leonard

   Turbo Rotary RV-6 N4VY
   N4VY.RotaryRoster.net <http://N4VY.RotaryRoster.net>
   www.RotaryRoster.net <http://www.RotaryRoster.net>
   leonardiniraq.blogspot.com <http://leonardiniraq.blogspot.com>

   So you went there after all :)

   Paul Lamar ...No rotor no motor.


Thanks David.  For the info and for your patients!
I guess we all have to start somewhere.
Don



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