Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.93.67.82] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2564540 for flyrotary@lancaironline.net; Tue, 02 Sep 2003 06:56:24 -0400 Received: from o7y6b5 (clt78-020.carolina.rr.com [24.93.78.20]) by ms-smtp-01.southeast.rr.com (8.12.5/8.12.2) with SMTP id h82An34Q020793 for ; Tue, 2 Sep 2003 06:49:05 -0400 (EDT) Message-ID: <001e01c37140$7f1c1ba0$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: flight #2 and #3 Date: Tue, 2 Sep 2003 06:53:51 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001B_01C3711E.F7BE3060" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_001B_01C3711E.F7BE3060 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageRusty, my experience is that (at least the more recent rotary = engines) can withstand oil temps into the engine of up to 240F for at = least a short period of time without causing damage (been there, done = that). Oil Pan temp is going to be quite a bit higher than oil coming = out of the cooler, so I would guestimate that your oil into the engine = is at least 15-20F less (probably more like 20-30F) than oil pan temps. = After all, the oil in your pan (a lot of it) has just come from cooling = the rotors, so is bound to be carrying a lot of heat. =20 I drilled and tapped a 1/8" NPT hole in the fitting where my oil returns = to the engine after going through the cooler for oil temp sensor. Ed Anderson ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Tuesday, September 02, 2003 12:20 AM Subject: [FlyRotary] Re: flight #2 and #3 But 210 into the engine is gospel from Racing Beat. =20 That's depressing. I may have to call Bruce tomorrow and get his view = on this. I just took another look at the log that Finn posted a while = back, and he did have a period of time where the oil pan temp was 242, = while the oil return from the cooler was 201. If (huge, unproven "if") = this is the case with my engine, then I'll be OK, but I need to measure = the temp into the engine to be sure. I believe the archives would show = that Finn suggested this to me a while back. Guess I should have = listened. =20 If I'm close to staying under 210, I could consider using a 160 degree = thermostat. I know I've seen one of those before, but I can't find it = listed anywhere at the moment. =20 Bill- I'm using a custom made Howe radiator with an oil/water heat = exchanger built into each tank. I have the oil plumbed in series with = the exchangers, such that it goes through the hot tank first, then the = cooler tank. After the second exchanger, it goes through a filter, then = back to the engine. In thinking about this, I might be able to drill = and tap a hole in the top of the spin on filter bracket for a temp = sensor. I'll have to take a closer look at that. My goal was to not = have to have a separate air/oil cooler, but rest assured, the big ugly = cowl has room for one if needed. =20 Rusty ------=_NextPart_000_001B_01C3711E.F7BE3060 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Rusty, my experience is that (at least = the more=20 recent rotary engines) can withstand oil temps into the engine of up to = 240F for=20 at least a short period of time without causing damage (been there, done = that).  Oil Pan temp is going to be quite a bit higher than oil = coming out=20 of the cooler, so I would guestimate that your oil into the engine is at = least=20 15-20F less (probably more like 20-30F)  than oil pan temps.  = After=20 all, the oil in your pan (a lot of it) has just come from cooling the = rotors, so=20 is bound to be carrying a lot of heat. 
 
I drilled and tapped a 1/8" NPT hole in = the fitting=20 where my oil returns to the engine after going through the cooler for = oil temp=20 sensor.
 
Ed Anderson
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Tuesday, September 02, = 2003 12:20=20 AM
Subject: [FlyRotary] Re: flight = #2 and=20 #3

But 210 into the engine is gospel from Racing Beat.  
 
That's=20 depressing.  I may have to call Bruce tomorrow and get = his view on=20 this.  I just took another look at the log that Finn posted = a while=20 back, and he did have a period of time where the oil pan temp was 242, = while=20 the oil return from the cooler was 201.  If (huge, unproven "if") = this is=20 the case with my engine, then I'll be OK, but I need to measure the = temp into=20 the engine to be sure.  I believe the archives would show that = Finn=20 suggested this to me a while back.  Guess I should have=20 listened.  
 
If I'm=20 close to staying under 210, I could consider using a 160 degree=20 thermostat.  I know I've seen one of those before, but I can't = find it=20 listed anywhere at the moment.   
 
Bill-=20 I'm using a custom made Howe radiator with an oil/water heat = exchanger built into each tank.  I have the oil plumbed in = series=20 with the exchangers, such that it goes through the hot = tank=20 first, then the cooler tank.  After the second exchanger, it goes = through=20 a filter, then back to the engine.  In thinking about this, I = might be=20 able to drill and tap a hole in the top of the spin on = filter bracket for=20 a temp sensor.  I'll have to take a closer look at = that.  My=20 goal was to not have to have a separate air/oil cooler, but rest = assured, the=20 big ugly cowl has room for one if needed. 
 
Rusty
 
 
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