X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qy0-f15.google.com ([209.85.221.15] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with ESMTP id 3490147 for flyrotary@lancaironline.net; Thu, 12 Feb 2009 13:35:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.221.15; envelope-from=rwstracy@gmail.com Received: by qyk8 with SMTP id 8so13806qyk.19 for ; Thu, 12 Feb 2009 10:34:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type; bh=dZHNEjYH8jTn3SiBzZx4PUbw+/ho8kzhmooeTvevzc4=; b=TAyHGcSsNCIIKqncaHMLpwBQkBpntvScY47AuzlPki8lcPGflH0FzYvticmKK2mC+9 3h42DFM0eDoCfXm0KIM20KWxdUKyklKIz73kw5kjLmBa5KicOGmwiVCssKBaKiTuxd7U lKGXtVuXc/De3psNMWD+qOEb2r8RbeU2IFePk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=oI/tzrhFMNd8Vr4PsCdH4yVMwTkJtgbgqOrAR9x+ySCDJ5/UHFxO1Dfgt3MLLPO2cj iHHyfJI4GouIZ5D2Gw3M//Jtga8RYPQhhNzzjvcOkMTXuwcqnc+/aKojslqlCR9Dpz3P HXowEM98DTqXzKyyMO+zR91Ubk4u2J2xI+hWs= MIME-Version: 1.0 Sender: rwstracy@gmail.com Received: by 10.224.74.11 with SMTP id s11mr1670862qaj.321.1234463688276; Thu, 12 Feb 2009 10:34:48 -0800 (PST) In-Reply-To: References: Date: Thu, 12 Feb 2009 13:34:48 -0500 X-Google-Sender-Auth: 9a9d8da1596ba100 Message-ID: <1b4b137c0902121034h4149097ap88d1069d41956a4e@mail.gmail.com> Subject: Re: [FlyRotary] Re: EM3 Shameless promotion From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015175ce1e2a0bb450462bcf99f --0015175ce1e2a0bb450462bcf99f Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit 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 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>> 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 > --0015175ce1e2a0bb450462bcf99f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I could easily switch TAS to IAS but I plan to have the altitude drive an o= utput 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 inclu= sion in the data logger data.

Tracy

On Wed, Feb 11, 2009 at 7:30 PM, Charlie England <ceengland@bellsouth.net> wrote:
Now that the thre= ad is reactivated, how about *indicated* airspeed? I'm thinking basic f= light 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) i= n front / behind various heat exchangers so you could see the relative pres= sure recovery.  I'll just use the same sensor as the main TAS pres= sure 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.n= et>> wrote:

   Tracy,
       I was mostly thinking about air pressures. Lik= e plenum, after
   radiator etc. I'm not sure what the best type of transduc= er would
   be, but my guess is the MAP sensors are the least expensive w= ay to
   go. Most of the lab grade transducers with a pedigree are jus= t
   ridiculously overpriced. If they work with 0-5 that would be = perfect.
       Unless you know of something better in which c= ase, 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 &nbs= p;0 - 5 volt
   inputs that can be calibrated to whatever units you wanted. &= nbsp;You
   would have to use a sensor that put out voltage in this range= though.

   Tracy




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