X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao105.cox.net ([68.230.241.41] verified) by logan.com (CommuniGate Pro SMTP 5.3.1) with ESMTP id 4086817 for flyrotary@lancaironline.net; Mon, 18 Jan 2010 12:15:29 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.41; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao105.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20100118171454.JAA12229.fed1rmmtao105.cox.net@fed1rmimpo02.cox.net> for ; Mon, 18 Jan 2010 12:14:54 -0500 Received: from willsPC ([68.105.86.80]) by fed1rmimpo02.cox.net with bizsmtp id X5Et1d00C1k005Q045EuAD; Mon, 18 Jan 2010 12:14:54 -0500 X-VR-Score: 0.00 X-Authority-Analysis: v=1.1 cv=hBBxVKrpT8NIO1i2+E6jIs4z/JDusIBXnpwMe9ND0ls= c=1 sm=1 a=XruvlouZCDbGUgEaRUiNZQ==:17 a=KlTB0KCUX8PiVLNBGacA:9 a=5Dsz27RqKQILN5ojOxoA:7 a=q7UNh73lnUGmGGlFNAUeeN0cDeEA:4 a=Le3ODjxHnELdMIaQ:21 a=rmp6QqxDVYWk9BH9:21 a=C_IRinGWAAAA:8 a=Ia-xEzejAAAA:8 a=mUF8GcU0PInIoCB4er4A:9 a=Vz-CZ0cGTetdlDTd0HUA:7 a=MuwsYZwPaftCt3gyna28yywO1pwA:4 a=si9q_4b84H0A:10 a=EzXvWhQp4_cA:10 a=XruvlouZCDbGUgEaRUiNZQ==:117 X-CM-Score: 0.00 Message-ID: <9596CADFCCBF4FB685515EB0F58A5502@willsPC> From: "Mike Wills" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] mechanical gauges Date: Mon, 18 Jan 2010 09:14:52 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_018D_01CA981E.B12F0510" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8089.726 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726 This is a multi-part message in MIME format. ------=_NextPart_000_018D_01CA981E.B12F0510 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Kevin, I used Autometer mechanical gauges for oil temp, oil pressure, and = coolant temp. I installed them partly because I didn't entirely trust my = engine monitor manufacturer to deliver (since gone out of business) and = partly to monitor effectiveness of the cooling system (they are mounted = in different locations from the sensors for my monitor so I can measure = delta temps across the coolers). I've used Autometers for 30+ years in a = variety of cars and have never had a problem with one. The temp gauges = require a little car with the capillary tube. I wouldn't use the cheesy = nylon line for the pressure gauge. Our local Earl's plumbing supplier = provided a teflon lined -3 hose for that and I have no concerns about a = hose tested to 1000psi failing. One advantage I didn't see mentioned. Electric gauges typically have a = meter movement with a sweep of 90 - 120 degrees where a mechanical has a = sweep of 270 degrees. This provides much better resolution and an easier = visual scan in an airplane cockpit. Mike Wills RV-4 N144MW From: kevin lane=20 Sent: Thursday, January 14, 2010 8:41 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] mechanical gauges I was asking summit racing about their mechanical gauges, wondering if = the price included all the necessary parts. they told me that the oil = pressure and water temp hook up directly with an 1/8th" line that I cut = to fit. I questioned whether the water temp would work that way since = water wouldn't be circulating thru the line. do mechanical temperature = gauges work that way? I assumed there must be a sealed , fixed length = bulb/line arrangement that converts temp into line pressure? what are the pros/cons of using mechanical vs. electrical gauges? I = have some of them currently in my plane but will need gauges to run the = engine initially for ground tests, and hate to pay for duplicates, so = leaning towards the cheaper mechanical gauges. kevin ------=_NextPart_000_018D_01CA981E.B12F0510 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Kevin,
 
 I used Autometer mechanical gauges for = oil temp,=20 oil pressure, and coolant temp. I installed them partly because I = didn=92t=20 entirely trust my engine monitor manufacturer to deliver (since gone out = of=20 business) and partly to monitor effectiveness of the cooling system = (they are=20 mounted in different locations from the sensors for my monitor so I can = measure=20 delta temps across the coolers). I've used Autometers for 30+ years in a = variety=20 of cars and have never had a problem with one. The temp gauges require a = little=20 car with the capillary tube. I wouldn=92t use the cheesy nylon line for = the=20 pressure gauge. Our local Earl's plumbing supplier provided a teflon = lined -3=20 hose for that and I have no concerns about a hose tested to 1000psi=20 failing.
 
 One advantage I didn=92t see mentioned. = Electric=20 gauges typically have a meter movement with a sweep of 90 - 120 degrees = where a=20 mechanical has a sweep of 270 degrees. This provides much better = resolution and=20 an easier visual scan in an airplane cockpit.
 
Mike Wills
RV-4 N144MW

From: kevin lane
Sent: Thursday, January 14, 2010 8:41 PM
Subject: [FlyRotary] mechanical gauges

I was asking summit racing about their = mechanical gauges, wondering if the price included all the necessary=20 parts.  they told me that the oil pressure and water temp hook up = directly=20 with an 1/8th" line that I cut to fit.  I questioned whether the = water temp=20 would work that way since water wouldn't be circulating thru the = line.  do=20 mechanical temperature gauges work that way?  I assumed there = must be=20 a sealed , fixed length bulb/line arrangement that converts temp into = line=20 pressure?
what are the pros/cons of using = mechanical vs.=20 electrical gauges?  I have some of them currently in my plane but = will need=20 gauges to run the engine initially for ground tests, and hate to pay for = duplicates, so leaning towards the cheaper mechanical=20 gauges.     kevin
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