X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3876768 for flyrotary@lancaironline.net; Tue, 06 Oct 2009 17:31:15 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (sv1-1.per.aanet.com.au [203.24.100.68]) by poplet2.per.eftel.com (Postfix) with ESMTP id A0DFB17370D for ; Wed, 7 Oct 2009 05:30:39 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 5C909BEC014 for ; Wed, 7 Oct 2009 05:30:38 +0800 (WST) Message-ID: From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Seepage, no more. Oil system Date: Wed, 7 Oct 2009 07:30:39 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004B_01CA4720.11971500" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 091006-0, 10/06/2009), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_004B_01CA4720.11971500 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bryan, I can't get my head around that one. To my way of thinking the jets = supply cooling oil to the rotor, when the rotor is full it is in best = balance. If the jest didn't open until very high RPM the rotors wouldn't = be getting cooled ( I guess that's good for fuel atomization) or be in = best balance and the rotors would probably have no oil in them at all = thought centrifugal force slinging the oil out. The oil spilling from = the rotor also feed the fixed rotor gear. No oil, no gear lube and rotor = not in best balance. To me your statement doesn't ring true. I must accept what Lynn says, = in that they open with RPM - but what RPM, surely not very high RPM. = However I stand to be corrected. George ( down under) FWIW, When I was rebuilding my Renesis, I had planned to install the jets. = I purchased them from Atkins against their recommendation. I bounced it = off Tracy, and he concurred with Atkins. Their contention was that the = jets were more for auto racing applications (very high rpm's). Bryan =20 -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Jeff Whaley Sent: Tuesday, October 06, 2009 3:45 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Seepage, no more. Oil system =20 Hi Lynn, with regards to your high-lighted comment about the check = balls in the crank - that is one item Bruce Turrentine suggested be = removed in an overhaul for aircraft applications, replacing the balls = with a carburetor jet to allow oil flow right away and continuously. So, = I did install carburetor jets in my e-shaft during rebuild. Any = comments? Anybody else out there do the same thing? Just curious as I'm = fighting high oil temps. Jeff =20 Plus, the rotary is cold blooded. The big bearings stress the oil film = to no great extent, and the major source of oil temperature is rotor = cooling. At low speeds and idle, the check balls in the crank don't even = open to allow cooling oil to spray into the engine. Those balls operate = as a function of RPM not temperature.=20 =20 On the other hand, you will get a water temperature increase within = one minute of startup. A water based coolant has very low viscosity and = flow to a distant heat exchanger will be immediate. Like the rear heater = in my school bus. =20 Lynn E. Hanover =20 ------=_NextPart_000_004B_01CA4720.11971500 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
Bryan,
I can't get my head around that = one.  To my=20 way of thinking the jets supply cooling oil to the rotor, when the = rotor is=20 full it is in best balance. If the jest didn't open until very high = RPM the=20 rotors wouldn't be getting cooled ( I guess that's good for fuel=20 atomization) or be in best balance and the rotors would probably have = no oil=20 in them at all thought centrifugal force slinging the oil out. The oil = spilling from the rotor also feed the fixed rotor gear. No = oil, no gear=20 lube and rotor not in best balance.
 
To me your statement doesn't ring = true. I must=20 accept what Lynn says, in that they open with RPM - but what RPM, = surely not=20 very high RPM. However I stand to be corrected.
George ( down under)
 

FWIW,

When I was = rebuilding=20 my Renesis, I had planned to install the jets.  I purchased them = from=20 Atkins against their recommendation.  I bounced it off Tracy, and = he concurred=20 with Atkins.  Their contention was that the jets were more for = auto=20 racing applications (very high rpm=92s).

Bryan

 

From:=20 Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On=20 Behalf Of Jeff Whaley
Sent: Tuesday, October 06, 2009 = 3:45=20 PM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re: = Seepage, no=20 more. Oil system

 

Hi=20 Lynn, with regards to your high-lighted comment about the check balls = in the=20 crank =96 that is one item Bruce Turrentine suggested be removed in an = overhaul=20 for aircraft applications, replacing the balls with a carburetor jet = to allow=20 oil flow right away and continuously. So, I did install carburetor = jets in my=20 e-shaft during rebuild. Any comments? Anybody else out there do the = same=20 thing?  Just curious as I=92m fighting high oil=20 temps.

Jeff

 

Plus,=20 the rotary is cold blooded. The big bearings stress the oil film to no = great=20 extent, and the major source of oil temperature is rotor cooling. At = low=20 speeds and idle, the check balls in the crank don't even open to allow = cooling=20 oil to spray into the engine. Those balls operate as a function of RPM = not=20 temperature. 

 

On the other = hand, you=20 will get a water temperature increase within one minute of = startup. A=20 water based coolant has very low viscosity and flow to a distant heat=20 exchanger will be immediate. Like the rear heater in my school=20 bus.

 

Lynn E.=20 Hanover

 

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