Mailing List flyrotary@lancaironline.net Message #45179
From: Tracy Crook <tracy@rotaryaviation.com>
Sender: <rwstracy@gmail.com>
Subject: Re: [FlyRotary] Re: EM3 Shameless promotion
Date: Thu, 12 Feb 2009 13:34:48 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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> 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>> 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




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