X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail13.syd.optusnet.com.au ([211.29.132.194] verified) by logan.com (CommuniGate Pro SMTP 5.0c1) with ESMTPS id 685086 for flyrotary@lancaironline.net; Sun, 28 Aug 2005 18:36:02 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.194; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-223-96.dsl.nsw.optusnet.com.au [211.31.223.96]) by mail13.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j7SMZBJ0010299 for ; Mon, 29 Aug 2005 08:35:13 +1000 Message-ID: <003e01c5ac20$feea8340$60df1fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Analog Digital system comparison Date: Mon, 29 Aug 2005 08:36:55 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003B_01C5AC74.D0054FC0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_003B_01C5AC74.D0054FC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed,=20 How does this differ from Tracy's system of fuel management ? George This may be of interest to some. Here are photos of my two fuel monitoring systems, comparing the = original Analog system with the new Digital System. The analog system served long and well, giving accuracy of fuel flow = and fuel used to less than a 1% error. However, it was large, had 9 = chips and only provided two bits of data - Fuel Flow and Fuel Used as = displayed information. Any change required a change to the design, new = chips and a new board. Very limited upgrade capability and just = outdated (well, it actually was when I designed it - but, being an old = analog type myself, it was a interim system until I could learn a bit = about this digital world) The digit system is much smaller, the one shown used 2 chips (since = reduced to one chip- the microprocessor) and provides 9 different fuel = factors (including Air/Fuel ratio indication), has user settable alarms, = remembers fuel parameters at shut down and has an automatic calibration = system. Software changes can be easily (relative speaking) make to = accommodate changes and upgrades. Currently waiting for a new board for = version 2 of the digital - this one will have a larger LCD screen (but = will still fit 2 1/4" hole) with graphical capability which I hope to be = able to display the EC2 fuel map in graphical form. The activation = buttons will be re-positioned so that even my fat fingers can better = push them. =20 So after many years of use - old reliable (but out-dated) analog = system is being retired with honors. Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_003B_01C5AC74.D0054FC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ed,
How does this differ from Tracy's = system of fuel=20 management ?
George
This may be of interest to some.
 
Here are photos of my two fuel monitoring = systems,=20 comparing the original Analog system with the new Digital = System.
 
The analog system served long and well, giving = accuracy=20 of fuel flow and fuel used to less than a 1% error.  However, it = was=20 large, had 9 chips and only provided two bits of data - Fuel=20 Flow and Fuel Used as displayed = information. =20 Any change required a change to the design, new chips and a new = board. =20 Very limited upgrade capability and just outdated (well, it actually = was when=20 I designed it - but, being an old analog type myself,  it was a = interim=20 system until I could learn a bit about this digital = world)
 
The digit system is much smaller, the one = shown used 2=20 chips (since reduced to one chip- the microprocessor) and provides 9 = different=20 fuel factors (including Air/Fuel ratio indication), has user settable = alarms,=20 remembers fuel parameters at shut down and has an automatic = calibration=20 system. Software changes can be easily (relative speaking) make to = accommodate=20 changes and upgrades.  Currently waiting for a new board for = version 2 of=20 the digital - this one will have a larger LCD screen (but will still = fit 2=20 1/4" hole) with graphical capability which I hope to be able to = display the=20 EC2 fuel map in graphical form.  The activation buttons will be=20 re-positioned so that even my fat fingers can better push them. =20
 
So after many years of use - old reliable = (but=20 out-dated) analog system is being retired with honors.
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary = Powered
Matthews,=20 NC
eanderson@carolina.rr.com

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