X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=HLeBLclv c=1 sm=1 tr=0 a=uFj3TlBkzih/0ty5evpddg==:117 a=29enrAnRItQSTk1fLlBiTQ==:17 a=7oIiURvLaKEA:10 a=17xQtuQ_ucwA:10 a=x7bEGLp0ZPQA:10 a=Fee85h93u3AA:10 a=7mUfYlMuFuIA:10 a=uv48Mb7MbfKmqXwxymAA:9 a=DM2EACwtT9z74Fb3:21 a=DUF5Zm3a5Kux1EZj:21 a=QEXdDO2ut3YA:10 a=2dr_HOd--9rzJD6Q:21 From: "Accountlehanover lehanover@aol.com" Received: from omr-m010e.mx.aol.com ([204.29.186.10] verified) by logan.com (CommuniGate Pro SMTP 6.2.5) with ESMTPS id 11305482 for flyrotary@lancaironline.net; Tue, 26 Jun 2018 15:22:11 -0400 Received-SPF: pass receiver=logan.com; client-ip=204.29.186.10; envelope-from=lehanover@aol.com Received: from mtaomg-mad01.mx.aol.com (mtaomg-mad01.mx.aol.com [172.26.221.207]) by omr-m010e.mx.aol.com (Outbound Mail Relay) with ESMTP id 78A1E380004C for ; Tue, 26 Jun 2018 15:21:54 -0400 (EDT) Received: from core-mdx07e.mail.aol.com (core-mdx07.mail.aol.com [10.76.9.16]) by mtaomg-mad01.mx.aol.com (OMAG/Core Interface) with ESMTP id 29B4938000081 for ; Tue, 26 Jun 2018 15:21:54 -0400 (EDT) Received: from 71.67.186.114 by webjas-vab091.srv.aolmail.net (10.96.18.94) with HTTP (WebMailUI); Tue, 26 Jun 2018 15:21:54 -0400 Date: Tue, 26 Jun 2018 15:21:54 -0400 To: flyrotary@lancaironline.net Message-Id: <1643d8b9061-c93-1af1f@webjas-vab091.srv.aolmail.net> Subject: OIL MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_143417_1263141950.1530040914017" X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS DWEB X-Originating-IP: [71.67.186.114] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1530040914; bh=zAeG0CXQCLlpvTG55296Zn6QFRaCboxtzeJDl1D7zZo=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=Og7q55F71EnD7NBuAwrMrgJ0Rd3cEtl0DrauM3GObS/okCzLsY+dwE+Dz2YbAULNI kJhhsMcKZztyaIsgkIfFwhVV9MF8r1NwSvIZVVjVnGitZBIgIJwsAMuK9E7NacbtfO kzoI0q8xBExzMt1MEtIlx6LMmsbJXLkMFjoUNR1w= x-aol-sid: 3039ac1addcf5b3292522ddc ------=_Part_143417_1263141950.1530040914017 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [FlyRotary] Re: Oil There are some very thick books about oil and water cooling systems. There = are some engineers who spend whole lifetimes on this. I am not one of those= . But I have learned quite a bit, mostly the hard way. So here is some of that. No flowing system likes sharp corners. Air, water = or oil. Do not use drilled 90s for fittings. Use sweep 90s and 45s. When bu= ilding coolers you find that the chilled media tends to cling to the tube, = causing a loss of efficiency because the hotter media is then being insulat= ed from the tube walls. So, manufactures tend to use fewer flat tubes (less money) and add cheap fi= xes to get back up to minimum performance.=C2=A0 Violent tribulation is req= uired to keep mixing the cooled media with the hottest media. So you see a = collection of odd things in the tubes. Mazda uses a Twistoflex watch band l= ookalike. Others a cross hatch pattern in the tube walls. Fluidine is the c= lass of the field with their inside out radiator design. =C2=A0 Every system has one sweet spot for every flow rate, every temperature, eve= ry pressure, every media. You can track that sweet spot with a thousand sen= sors and a lap top. And cooler designers do just that. Everything affects e= verything. =C2=A0 Rotaries run best (Best power) when the oil is below 160 degrees. (Daryl Dr= ummond) . High rotor face temps tend to expand the fuel air mixture entering the chamber quickly, killing o= ff more of the incoming flow. Bad at low RPM. Less bad at high RPM. We race= d at Grattan Michigan with the temps at 30 degrees.=C2=A0 Water thermostat = in place and 2/3 of the radiator taped off. All of the oil radiator taped o= ff.=C2=A0 Ran the race with water temps at 120 degrees and oil temps at 150= . The thermostat had a 1/8 hole in the edge to let air bubbles through. Thi= s is not to suggest that 1/8 inch hose is adequate for cold climates. =C2=A0 In olden times when we still used the stock pump we opened the lateral gall= ery plug and took the oil out of the block right there. Going back into the= block at the stock rear Banjo fitting. And the lateral gallery in the fron= t iron to the front main bearing. Later with the massive external pump we s= till fed that front bearing with its own supply. We did not plug the dowels= that connect those two location. =C2=A0 Mistral found the oil pickup tube and bug screen to be a problem. The anti = vortex disk diameter is stupid small. And so then is the bug screen. I removed the bug screen and added a big fla= t disc to the end of the tube. I built up the back side with braze and ground the sharp edge down to look = like a trumpet bell. The bug screen would filter out a mouse but not small = enough to stop the grit that will kill the pump or bearings. I never missed= it.=C2=A0 Mistral cast up a new pick up tube but without the bug screen. t= hey used a baffle plate between between the=C2=A0 pan and engine. It had la= rge areas of screen to perform the bug screen job. =C2=A0 The object of higher oil pressure is move oil out of the wedge more quickly= so as not to damage the very soft bearing material.=C2=A0 =C2=A0 Low oil pressure at idle is usually not a problem. No bearing stress at all= . 5 or 6 pounds is fine. Minimum loaded pressure not below 60 PSI while loo= king for nearest to see where you 80 PSI pressure went. =C2=A0 If you or some engine builder took out the springs and balls from the crank= then low idle pressure cannot be corrected. Used only for constant=C2=A0 h= igh RPM in racing. You can put them back in at over haul in about 15 years.= Keep in mind that this advice is free. And, worth every penny. =C2=A0 Lynn E. Hanover ------=_Part_143417_1263141950.1530040914017 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Subj= ect: Re: [FlyRotary] Re: Oil
There are some very= thick books about oil and water cooling systems. There are some engineers = who spend whole lifetimes on this. I am not one of those. But I have learne= d quite a bit, mostly the hard way.
So here is some of = that. No flowing system likes sharp corners. Air, water or oil. Do not use = drilled 90s for fittings. Use sweep 90s and 45s. When building coolers you = find that the chilled media tends to cling to the tube, causing a loss of e= fficiency because the hotter media is then being insulated from the tube wa= lls.
So, manufactures te= nd to use fewer flat tubes (less money) and add cheap fixes to get back up = to minimum performance.  Violent tribulation is required to keep mixin= g the cooled media with the hottest media. So you see a collection of odd t= hings in the tubes. Mazda uses a Twistoflex watch band lookalike. Others a = cross hatch pattern in the tube walls. Fluidine is the class of the field w= ith their inside out radiator design.

Every system has on= e sweet spot for every flow rate, every temperature, every pressure, every = media. You can track that sweet spot with a thousand sensors and a lap top.= And cooler designers do just that. Everything affects everything.

Rotaries run best (= Best power) when the oil is below 160 degrees. (Daryl Drummond) . High roto= r face temps
tend to expand the = fuel air mixture entering the chamber quickly, killing off more of the inco= ming flow. Bad at low RPM. Less bad at high RPM. We raced at Grattan Michig= an with the temps at 30 degrees.  Water thermostat in place and 2/3 of= the radiator taped off. All of the oil radiator taped off.  Ran the r= ace with water temps at 120 degrees and oil temps at 150. The thermostat ha= d a 1/8 hole in the edge to let air bubbles through. This is not to suggest= that 1/8 inch hose is adequate for cold climates.

In olden times when= we still used the stock pump we opened the lateral gallery plug and took t= he oil out of the block right there. Going back into the block at the stock= rear Banjo fitting. And the lateral gallery in the front iron to the front= main bearing. Later with the massive external pump we still fed that front= bearing with its own supply. We did not plug the dowels that connect those= two location.

Mistral found the o= il pickup tube and bug screen to be a problem. The anti vortex disk diamete= r is stupid small.
And so then is the = bug screen. I removed the bug screen and added a big flat disc to the end o= f the tube.
I built up the back= side with braze and ground the sharp edge down to look like a trumpet bell= . The bug screen would filter out a mouse but not small enough to stop the = grit that will kill the pump or bearings. I never missed it.  Mistral = cast up a new pick up tube but without the bug screen. they used a baffle p= late between between the  pan and engine. It had large areas of screen= to perform the bug screen job.

The object of highe= r oil pressure is move oil out of the wedge more quickly so as not to damag= e the very soft bearing material. 

Low oil pressure at= idle is usually not a problem. No bearing stress at all. 5 or 6 pounds is = fine. Minimum loaded pressure not below 60 PSI while looking for nearest to= see where you 80 PSI pressure went.

If you or some engi= ne builder took out the springs and balls from the crank then low idle pres= sure cannot be corrected. Used only for constant  high RPM in racing. = You can put them back in at over haul in about 15 years. Keep in mind that = this advice is free. And, worth every penny.

Lynn E. Hanover


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