X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3682360 for flyrotary@lancaironline.net; Sun, 14 Jun 2009 18:21:51 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (sv1-1.per.aanet.com.au [203.24.100.68]) by poplet2.per.eftel.com (Postfix) with ESMTP id 2B75F17359C for ; Mon, 15 Jun 2009 06:21:07 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 9698FBEC038 for ; Mon, 15 Jun 2009 06:21:05 +0800 (WST) Message-ID: From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Wire separation? Date: Mon, 15 Jun 2009 08:21:09 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0027_01C9ED92.3C71D130" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 0617-3, 04/28/2006), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0027_01C9ED92.3C71D130 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Tracy or anyone, Can you tell me what sensors you use to calculate fuel ratios. I notice the mention of a MAP sensor (vacuum type), but that would give = pressure, not density. I notice the absence of an oxygen sensor in the case of 100LL is used - = this is understood. I suppose an oxygen sensor could be used = independently. I assume RPM would be in the calculations for fuel flow, but I wonder = how you actually arrive at air density? perhaps OAT is used. Basically I wondering what the simplest air density sensor arrangement = would be. I thought Oxygen sensor (not for 100LL), with a RPM and = throttle position sensor. George (down under) Old time distributors and carburetors didn=92t care how badly you = wired the electrical system. Digital systems are not so forgiving of = poor wiring practices. Noisy power or ground wiring is one of the most = common causes of initial builder problems with computerized equipment = (including ECUs). =20 In addition to the wire bundling answers you got, the basic power = wiring is as or even more important. Here is a basic aircraft wiring = scheme that I recommend in latest version of the installation guide. = Not detailed but somewhere to start. Note the independent power feeds = from the battery for the various systems. This is a physical as well as = electrical representation.=20 Tracy -------------------------------------------------------------------------= ----- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_0027_01C9ED92.3C71D130 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

Tracy or anyone,

Can you tell me what sensors you use to = calculate fuel ratios.

I notice the mention of a MAP sensor = (vacuum type),=20 but that would give pressure, not density.

I notice the absence of an oxygen = sensor in the=20 case of 100LL is used - this is understood. I suppose an oxygen sensor = could be=20 used independently.

I assume RPM would be in the = calculations for fuel=20 flow, but I wonder how you actually arrive at air density? perhaps = OAT is=20 used.

Basically I wondering what the simplest = air density=20 sensor arrangement would be. I thought Oxygen sensor (not for 100LL), = with a RPM=20 and throttle position sensor.

George (down under)

Old=20 time distributors and carburetors didn=92t care how badly you wired = the=20 electrical system. Digital systems are not so = forgiving of=20 poor wiring practices. Noisy power or ground wiring = is one=20 of the most common causes of initial builder problems with = computerized=20 equipment (including ECUs).

In addition to = the wire=20 bundling answers you got, the basic power wiring is as or even more=20 important. Here is a basic aircraft wiring scheme that I = recommend in=20 latest version of the installation guide. Not detailed but = somewhere to=20 start. Note the independent power feeds from the battery for the = various=20 systems. This is a physical as well as electrical = representation.=20

Tracy

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Homepage: http://www.flyrotary.com/
Archive and=20 UnSub: =20 = http://mail.lancaironline.net:81/lists/flyrotary/List.html
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