Return-Path: Received: from wb1-a.mail.utexas.edu ([128.83.126.134] verified) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP-TLS id 457706 for flyrotary@lancaironline.net; Fri, 08 Oct 2004 13:00:09 -0400 Received-SPF: none receiver=logan.com; client-ip=128.83.126.134; envelope-from=msteitle@mail.utexas.edu Received: (qmail 32959 invoked from network); 8 Oct 2004 16:59:38 -0000 Received: from dhcp-191-101.per.utexas.edu (HELO hrs-mark.mail.utexas.edu) (146.6.191.101) by wb1.mail.utexas.edu with SMTP; 8 Oct 2004 16:59:38 -0000 Message-Id: <5.1.1.5.2.20041008115723.021597a0@localhost> X-Sender: msteitle@mail.utexas.edu@localhost X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Fri, 08 Oct 2004 11:59:32 -0500 To: "Rotary motors in aircraft" From: Mark Steitle Subject: Re: [FlyRotary] Temperature calibration In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====================_77842921==.ALT" --=====================_77842921==.ALT Content-Type: text/plain; charset="iso-8859-1"; format=flowed Content-Transfer-Encoding: quoted-printable At 09:35 AM 10/8/2004 -0700, you wrote: >Mark wrote: > >Or, for a totally different approach to calibration, how about an infrared= =20 >thermometer. Just point it at the thermostat housing and read the temp on= =20 >the LCD readout. Couldn't be any easier than that. > > > >It s true, they are easy, and a great way to go, but . . . you have to use= =20 >with care. I have one (different brand) that I borrowed from a racing=20 >friend who uses it to measure tire temps,. They measure quite accurately= =20 >(+- maybe 2%), and consistently, on a flat surface that is flat black. On= =20 >shiny curved surfaces your can get readings all over the place. Also, the= =20 >field of view expands with distance, so if you can t get close enough, you= =20 >may be reading lots of other stuff in the background. I painted about 1=20 >diameter spots with flat black paint where I want to measure, and get the= =20 >thing about =BD away, and get good readings. On the curved surface of the= =20 >pump outlet there is some variation unless held dead center. > > > >Al Al, Thanks, that's good information to know. Sounds like the infrared=20 thermometer might be good for a quick-check, provided you can safely get=20 close enough to what you want to measure. Mark S. --=====================_77842921==.ALT Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable At 09:35 AM 10/8/2004 -0700, you wrote:

Mark wrote:

Or, for a totally different approach to calibration, how about an infrared thermometer.  Just point it at the thermostat housing and read the temp on the LCD readout.  Couldn't be any easier than that.

 

It s true, they are easy, and a great way to go, but . . . you have to use with care.  I have one (different brand) that I borrowed from a racing friend who uses it to measure tire temps,.  They measure quite accurately (+- maybe 2%), and consistently, on a flat surface that is flat black.  On shiny curved surfaces your can get readings all over the place.  Also, the field of view expands with distance, so if you can t get close enough, you may be reading lots of other stuff in the background.  I painted about 1 diameter spots with flat black paint where I want to measure, and get the thing about =BD away, and get good readings. On the curved surface of the pump outlet there is some variation unless held dead center.

 

Al

Al,
Thanks, that's good information to know.  Sounds like the infrared thermometer might be good for a quick-check, provided you can safely get close enough to what you want to measure.

Mark S. --=====================_77842921==.ALT--