X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from SMTP02.INFOAVE.NET ([165.166.0.27] verified) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1316150 for flyrotary@lancaironline.net; Wed, 09 Aug 2006 23:16:10 -0400 Received-SPF: pass receiver=logan.com; client-ip=165.166.0.27; envelope-from=jewen@comporium.net Received: from Engineer1 ([208.104.88.189]) by smtp.hostserver (PMDF V6.2-X31 #31343) with SMTP id <01M5T0HG4MWY8YA6O7@smtp.hostserver> for flyrotary@lancaironline.net; Wed, 09 Aug 2006 23:14:03 -0400 (EDT) Date: Wed, 09 Aug 2006 23:14:02 -0400 From: Joe Ewen Subject: Re: [FlyRotary] Re: water temp location To: Rotary motors in aircraft Message-id: <00be01c6bc2b$079bbb60$6505a8c0@cooleygroup.local> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 X-Mailer: Microsoft Outlook Express 6.00.2900.2869 Content-type: text/plain; reply-type=response; charset=iso-8859-1; format=flowed Content-transfer-encoding: 7bit X-Priority: 3 X-MSMail-priority: Normal References: Buly, I asked because IR can be tricky when it comes to measuring metals (especially aluminum.) The emissivity value of most metals is quite low and an accurate reading is based on a accurate emisivity value. It is possible the temp reading on the 1.5" aluminum tube was lower than actual due to improper emisivity setting. Another misconception I have seen with IR measurement is with guns that have a laser locator spot. May users this the laser spot is the spot being measured, actually it is the center of the measurement area which can be larger than the 1.5" diameter depending upon the D:S ratio of the meter and the measurement distance. I am not an EE, so no need to puke, more of a controls, automation, and instrumentation engineer. ----- Original Message ----- From: "Bulent Aliev" To: "Rotary motors in aircraft" Sent: Wednesday, August 09, 2006 9:47 PM Subject: [FlyRotary] Re: water temp location > The gun belongs to my hangar neighbor. He is an electronics engineer > (another one. i'm gona puke :)). First he calibrated the gun. Than he > pointed it to the area closest to the temp sensor by the oil pressure > sensor. The temp reading was same as the EM2 water temp reading. Than he > moved to the pump outlet, thin wall 1.5" aluminum tube. the reading was > lower. > I could not believe it so we did it again. Same results. > Bulent "Buly" Aliev > FXE Ft lauderdale, FL > http://tinyurl.com/s5xw8 > > On Aug 9, 2006, at 7:53 PM, Joe Ewen wrote: > >> Buly, >> What kind of hand held unit did you use? IR? >> Joe >> >> ----- Original Message ----- From: "Bulent Aliev" >> >> To: "Rotary motors in aircraft" >> Sent: Wednesday, August 09, 2006 2:32 PM >> Subject: [FlyRotary] Re: water temp location >> >> >>> I did it with one of the handheld temp meters. Surprisingly the water >>> exiting the pump was about 5-10 degree lower temp? Did it couple >>> different ways and the results were similar. >>> Buly >>>> Group, >>>> >>>> >>>> >>>> Has anyone measured the water temp difference between the stock >>>> (under the oil filter tower) and the water pump outlet. Bill Eslick >>>> and I were discussing this a couple of weeks ago. I am measuring >>>> water temp going out of the engine, post water pump outlet. Just >>>> curious! >>>> >>>> >>>> >>>> Thanks, >>>> >>>> Jason >>>> >>>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >>> >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >