No way to just make it another software/display item? I was assuming (don'tcha love that word) that static pressure would drive the encoder output, & a separate software routine would calculate IAS from the pressure differential measurement & true ALT from static pressure & manually-entered baro setting, & the results would be available on an(other) air data page.

(creep, creep, creep....)

Charlie

Tracy Crook wrote:

I could easily switch TAS to IAS but I plan to have the altitude drive an output for transponder encoding.  That pretty much limits it to reading pressure altitude.  I could have a baro adjustment if the encoder is not used.  I'll put this on "The List".

It already has VSI but the response time is slow compared to the steam gauge type.  Good enough for backup I think and it is useful for inclusion in the data logger data.

Tracy

On Wed, Feb 11, 2009 at 7:30 PM, Charlie England <ceengland@bellsouth.net <mailto:ceengland@bellsouth.net>> wrote:

   Now that the thread is reactivated, how about *indicated*
   airspeed? I'm thinking basic flight instrument backup: AS, ALT
   (with baro) & maybe vertical speed.

   Charlie

   Tracy Crook wrote:

       That came up in an earlier topic.  I had decided to have a
       second TAS readout option so you could put a static probe
       (sponge covered tube, etc) in front / behind various heat
       exchangers so you could see the relative pressure recovery.
        I'll just use the same sensor as the main TAS pressure sensor.
       You can convert the mph reading back into pressure if that was
       needed.

       Tracy

       On Wed, Feb 11, 2009 at 5:45 PM, Monty Roberts
       <montyr2157@alltel.net <mailto:montyr2157@alltel.net>
       <mailto:montyr2157@alltel.net <mailto:montyr2157@alltel.net>>>
       wrote:

          Tracy,
              I was mostly thinking about air pressures. Like plenum,
       after
          radiator etc. I'm not sure what the best type of transducer
       would
          be, but my guess is the MAP sensors are the least expensive
       way to
          go. Most of the lab grade transducers with a pedigree are just
          ridiculously overpriced. If they work with 0-5 that would
       be perfect.
              Unless you know of something better in which case, I'm
       all ears. ;-)        Monty
                  Hi Monty,
             What kind of pressure are you thinking of?  Air, liquid,
       what
          pressure range, etc?  I could have some gen purpose  0 - 5 volt
          inputs that can be calibrated to whatever units you wanted.
        You
          would have to use a sensor that put out voltage in this
       range though.

          Tracy




   --
   Homepage:  http://www.flyrotary.com/
   Archive and UnSub:      http://mail.lancaironline.net:81/lists/flyrotary/List.html


------------------------------------------------------------------------


No virus found in this incoming message.
Checked by AVG - www.avg.com Version: 8.0.234 / Virus Database: 270.10.23/1949 - Release Date: 02/10/09 07:20:00

 

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html