Return-Path: Received: from corpprd-pxy2.canfor.ca ([198.162.160.3] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 381472 for flyrotary@lancaironline.net; Fri, 27 Aug 2004 16:31:31 -0400 Received-SPF: none receiver=logan.com; client-ip=198.162.160.3; envelope-from=Steve.Bartrim@canfor.com Received: from canformail1.canfor.ca (canformail1.canfor.ca [199.60.193.29]) by corpprd-pxy2.canfor.ca (Build 103 8.9.3p2/NT-8.9.3) with ESMTP id NAA03990 for ; Fri, 27 Aug 2004 13:31:00 -0700 X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message Subject: RE: [FlyRotary] Re: EM-2 Liquid temp 2 and 3 connection Date: Fri, 27 Aug 2004 13:30:54 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C48C74.C06CFE80" Message-ID: <1F17B59A61D4194095359264D24D22A2708CCF@mailman.canfor.ca> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: EM-2 Liquid temp 2 and 3 connection Thread-Index: AcSLay/VjwP/uBg1TmKLRJ7Kr83XfwALLfKg From: "Bartrim, Todd" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C48C74.C06CFE80 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable > Then here's how you can repay me :-) When you hook this up, you could = do me a huge favor, and test something for me. I only have one of the 3 = wire temp sensors, which is the OAT, so I used that 5V wire for both aux = liquid temps as well. Now that I find my OAT being a bit off, I = wondered if I was causing an error by tying into the 5V line for two = other sensors. If you get to the point of hooking this up to one of = your existing air temp 5V sources, it would be real interesting to know = if your temp reading changes when you connect the liquid sensor circuit. = I really doubt this is the problem, but had already made a mental note = to check it if I didn't come up with some other calibration solution = eventually. >=20 >=20 I've found my OAT to be a few degrees high as well, but I'd attributed = it my OAT location. Since I have all of my sensor connections at a = terminal block on the engine mount, I wanted to avoid running the OAT = wires back through the FW and out into the wings. So I got the bright = idea that the nose wheel was a great place. So I ran the wires down to = the bottom of the fairing and inserted the sensor into a probe tip that = is mounted in the fairing just above the gear pant swivel. I thought it = was pretty ingenious, but now I'm thinking that hot cowl air is being = drawn down this fairing since I have sealed the intersection well, and = heating the back side of the temp probe. I find the temp to be close to = what my Dynon reads (after conversion from Celsius to that old fangled = Fahrenheit), while on the ground, but up to 10 degrees high while in = flight. When I get back from school, I'll look into moving this and checking = the calibration. S. Todd Bartrim Turbo 13B RX-9endurance C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Imagination is more important than knowledge" -Albert Einstein ------_=_NextPart_001_01C48C74.C06CFE80 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable RE: [FlyRotary] Re: EM-2 Liquid temp 2 and 3 connection

Then = here's how you can repay me :-)  When you hook this up, you could = do me a huge favor, and test something for me.  I only have one of = the 3 wire temp sensors, which is the OAT, so I used that 5V wire for = both aux liquid temps as well.  Now that I find my OAT being a bit = off, I wondered if I was causing an error by tying into the 5V line for = two other sensors.  If you get to the point of hooking this up to = one of your existing air temp 5V sources, it would be real interesting = to know if your temp reading changes when you connect the liquid sensor = circuit.  I really doubt this is the problem, but had already made = a mental note to check it if I didn't come up with some other = calibration solution eventually.


I've found my OAT = to be a few degrees high as well, but I'd attributed it my OAT location. = Since I have all of my sensor connections at a terminal block on the = engine mount, I wanted to avoid running the OAT wires back through the = FW and out into the wings. So I got the bright idea that the nose wheel = was a great place. So I ran the wires down to the bottom of the fairing = and inserted the sensor into a probe tip that is mounted in the fairing = just above the gear pant swivel. I thought it was pretty ingenious, but = now I'm thinking that hot cowl air is being drawn down this fairing = since I have sealed the intersection well, and heating the back side of = the temp probe. I find the temp to be close to what my Dynon reads = (after conversion from Celsius to that old fangled Fahrenheit), while on = the ground, but up to 10 degrees high while in flight.

        When I get back from school, I'll look into = moving this and checking the calibration.
S. Todd = Bartrim
Turbo = 13B
RX-9endurance
C-FSTB
http://www3.telus.= net/haywire/RV-9/C-FSTB.htm

        "Imagination is more important than = knowledge"
        =         =         =         =         -Albert Einstein


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