X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Received: from alnrmhc13.comcast.net ([204.127.225.93] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1626667 for flyrotary@lancaironline.net; Fri, 01 Dec 2006 01:00:47 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.225.93; envelope-from=n3773@comcast.net Received: from rv8 (c-24-21-141-28.hsd1.or.comcast.net[24.21.141.28]) by comcast.net (alnrmhc13) with SMTP id <20061201060014b1300br3bde>; Fri, 1 Dec 2006 06:00:24 +0000 Message-ID: <016d01c7150d$fc53d8a0$1c8d1518@rv8> Reply-To: "kevin lane" From: "kevin lane" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: gauges Date: Thu, 30 Nov 2006 21:59:37 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0160_01C714CA.D3F6BAA0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2869 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 This is a multi-part message in MIME format. ------=_NextPart_000_0160_01C714CA.D3F6BAA0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I have 1000 trouble-free hrs on a $15 mechanical automotive oil pressure = gauge. it has a 1/8" plastic line from the firewall to the gauge. I = just put a new panel in and the plastic line looked as good as new. = granted, I have an O-320, but I doubt the gauge can tell. cheaper. = lighter, reliable, fewer parts, no electrical demands/needs. if there = were a leak I would guess it would take quite a while to pump 6 qts of = oil onto the cabin floor. at least you'd know it, whereas with a sender = unit failure in the engine compartment you might not know until the = pressure dropped. after having intermittent problems with my autopilot = (it just let's go sometimes) I realized how difficult debugging some = systems can be and consequentially left all the steam gauges in my = panel.(that eggs in one basket thing) the vibrational environment of an = airplane makes many things fail that won't on the bench. kevin ----- Original Message -----=20 From: Wendell Voto=20 To: Rotary motors in aircraft=20 Sent: Thursday, November 30, 2006 9:26 PM Subject: [FlyRotary] Re: gauges Group, Fixing to get oil pressure gauge and am concerned about the quality of = the electrical sending units. How likely are they to leak or come apart = and cause complete oil loss? Using a mechanical gauge eliminates the sender but uses a capillary = tube that can break. What are the pros and cons to electrical gauges? Wendell ------=_NextPart_000_0160_01C714CA.D3F6BAA0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I have 1000 trouble-free hrs on a $15 = mechanical=20 automotive oil pressure gauge.  it has a 1/8" plastic line from the = firewall to the gauge.  I just put a new panel in and the plastic = line=20 looked as good as new.  granted, I have an O-320, but I doubt the = gauge can=20 tell.  cheaper. lighter, reliable, fewer parts, no electrical=20 demands/needs.  if there were a leak I would guess it would take = quite a=20 while to pump 6 qts of oil onto the cabin floor.  at least you'd = know it,=20 whereas with a sender unit failure in the engine compartment you might = not know=20 until the pressure dropped.  after having intermittent = problems with=20 my autopilot (it just let's go sometimes) I realized how difficult = debugging=20 some systems can be and consequentially left all the steam gauges in my=20 panel.(that eggs in one basket thing)  the vibrational environment = of an=20 airplane makes many things fail that won't on the=20 bench.     kevin
----- Original Message -----
From:=20 Wendell = Voto=20
Sent: Thursday, November 30, = 2006 9:26=20 PM
Subject: [FlyRotary] Re: = gauges

Group,
 
Fixing to get oil pressure gauge and am concerned about the = quality of=20 the electrical sending units.  How likely are they to leak or = come apart=20 and cause complete oil loss?
Using a mechanical gauge eliminates the sender but uses a = capillary tube=20 that can break. What are the pros and cons to electrical gauges?
 
Wendell

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