X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=T4/ysMCQ c=1 sm=1 tr=0 a=pclmDsHkpheh2ESL7sCqlg==:117 a=xycr6CVXJRVtFs4WRGOeRA==:17 a=FmdZ9Uzk2mMA:10 a=DAwyPP_o2Byb1YXLmDAA:9 a=Ia-xEzejAAAA:8 a=eRLigfuSAAAA:8 a=C_IRinGWAAAA:8 a=pGLkceISAAAA:8 a=PkYCYgy9AAAA:8 a=rL9Xfwt-UdTIJ9j1YQ4A:9 a=QEXdDO2ut3YA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=zbYLq98E8Q5cjiiN:21 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=hTZeC7Yk6K0A:10 a=frz4AuCg-hUA:10 a=IH6gQlQPKDLDsc2sXGcp:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=BfhXYjFvZD4iae-mNffo:22 a=04jDZsmNAJ9MhMURcWJe:22 a=pHzHmUro8NiASowvMSCR:22 a=6VlIyEUom7LUIeUMNQJH:22 From: "Marc Wiese cardmarc@charter.net" Received: from [47.43.20.33] (HELO impout009.msg.chrl.nc.charter.net) by logan.com (CommuniGate Pro SMTP 6.2.13) with ESMTPS id 12878974 for flyrotary@lancaironline.net; Sat, 24 Aug 2019 10:33:22 -0400 Received-SPF: pass receiver=logan.com; client-ip=47.43.20.33; envelope-from=cardmarc@charter.net Received: from HomeDesktop ([97.94.202.172]) by cmsmtp with ESMTP id 1X6GiHinTiYmu1X6GilNUV; Sat, 24 Aug 2019 14:33:04 +0000 Authentication-Results: charter.net; none X-Authority-Analysis: v=2.3 cv=S41tP7kP c=1 sm=1 tr=0 a=xycr6CVXJRVtFs4WRGOeRA==:117 a=xycr6CVXJRVtFs4WRGOeRA==:17 a=DAwyPP_o2Byb1YXLmDAA:9 a=Ia-xEzejAAAA:8 a=eRLigfuSAAAA:8 a=C_IRinGWAAAA:8 a=pGLkceISAAAA:8 a=PkYCYgy9AAAA:8 a=rL9Xfwt-UdTIJ9j1YQ4A:9 a=QEXdDO2ut3YA:10 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=zbYLq98E8Q5cjiiN:21 a=gKO2Hq4RSVkA:10 a=UiCQ7L4-1S4A:10 a=hTZeC7Yk6K0A:10 a=frz4AuCg-hUA:10 a=IH6gQlQPKDLDsc2sXGcp:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=BfhXYjFvZD4iae-mNffo:22 a=04jDZsmNAJ9MhMURcWJe:22 To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: oil coolers Date: Sat, 24 Aug 2019 09:33:04 -0500 Message-ID: <004601d55a88$d71ad650$855082f0$@charter.net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0047_01D55A5E.EE471840" X-Mailer: Microsoft Outlook 16.0 Thread-Index: AdVaiNaJpiG9BH8LS6yVaYXap+YJKw== Content-Language: en-us X-CMAE-Envelope: MS4wfL9nGEfktIyVrvthtB9rkQDIKxxZU6AARjP2IAYe8+MOogJEbIuVak2/KWUXaINeCIDwUPw06iKWUgGVR+oa0mAcQJo+DUDkHMhbaEuqhWYbeA68+bdo XBhl4K2VClgOKSetIltjeVgtKfH5tKgM0hdHOA+Ps6c+r/qJ7p/FMfTc0Mj1LSzmkEe/9ivD8twbzQ== This is a multipart message in MIME format. ------=_NextPart_000_0047_01D55A5E.EE471840 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable I had heard that the original RX7 oil coolers were better than most, due = to their internal turbulator configuration. Especially the 2nd gen long = oil cooler? I did hear you have to bypass the internal thermostatic = valves in them, however? And the 3 gen RX7 models used a smaller oil = cooler, some having 2 of them---- Anybody have any scientific tests of these original coolers? MW =20 From: Rotary motors in aircraft=20 Sent: Saturday, August 24, 2019 5:18 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Broken Apex seal leads to dissassembly. =20 I have a temp. sensor in pan where Mazda has a bung, temps can hit 230F = on takeoff/climbout, hover around 215-220F in cruise, 200-204F = after cooler. On August 24, 2019 at 12:13 AM "Andrew Martin andrew@martinag.com.au" = > = wrote:=20 David. Take this oportunity to ditch the rx7 oil cooler. They are = absolute junk. Only flow a fraction of the oil being pumped so oil in = the pan is much hotter than is indicated. Mocal or Setrab work. =20 On Sat, 24 Aug. 2019, 11:05 am David COOK hoursaway1@comcast.net = , < flyrotary@lancaironline.net = > wrote:=20 Rads are evap. cores modified for -12 hoses (from GM full sized PU truck = aprox. 2006), oil cooler is the Mazda RX7 cooler, upper eng. filter boss = cut off and bypassed, remote oil filter w/-10 hoses, rotor housings ok, = rotors ok, E-shaft ok. One other note, Apex seals only had one spring = under each?, vids that I have seen they show a long and a short spring, = diff. design? David,,,,,,thanks for the info. On August 23, 2019 at 12:58 PM "Matt Boiteau mattboiteau@gmail.com = " < flyrotary@lancaironline.net = > wrote:=20 https://chipsmotorsports.com/ is in Detroit. Can lap and renitride the = irons. Are your rotor housing okay? =20 Out of curiosity, what size rads do you have for coolant and oil ? =20 - Matt Boiteau On 2019-08-23 12:54:26 PM, David COOK hoursaway1@comcast.net = > wrote: Am in need of info., where to send my irons ( all three), to be lapped = or resurfaced, (or purchase some replacements) this is a 13B so the = coolant seal grooves are in the irons. I am in Lansing Michigan for = distance reference. This was supposed to be a "professional" built eng. = w/aviation mods. the mods are ok, but the wear in the irons in the = combustion area looks more like MANY hrs. of use. I only put 80 hrs. on = the hobbs. 20 was ground testing the rest in the air. Temps ran 190F = coolant, 202F oil, pretty regular. Lubrication was 1oz. 2cyc.oil and = 1/2 oz. MMOil for every gal. fuel. On prep for Osh. trip the next day, = wanted some T&G's, runup normal very strong could not hold back with = brakes, aprox. 90% throttle about foot off runway started missing, set = back down and at turn off to taxiway eng. quit running, had to lean EC2 = all the way to left to get started again. Checked EM2 bar graph, all in = center so not fuel MAP scramble. Thinking SAG (never experienced before = so don't know the symptoms) changed plugs, no joy, tested coils, all = ok, checked comp. no needle jump on 2 chambers, dissassem. found broken = chunk from Apex seal rotor #2. Done crying now need to fix (short = summer). David R. Cook RV6A Rotary Lansing MI =20 ------=_NextPart_000_0047_01D55A5E.EE471840 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

I had heard that the original = RX7 oil coolers were better than most, due to their internal turbulator = configuration. Especially the 2nd gen long oil cooler? I did = hear you have to bypass the internal thermostatic valves in them, = however? And the 3 gen RX7 models used a smaller oil cooler, some having = 2 of them----

Anybody have any scientific = tests of these original coolers?

MW

 

From: Rotary motors in aircraft =
Sent: Saturday, August 24, 2019 5:18 AM
To: Rotary = motors in aircraft = <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: = Broken Apex seal leads to dissassembly.

 

I have a temp. sensor in pan where Mazda has a bung, temps can hit = 230F on takeoff/climbout, hover = around         215-220F  in = cruise, 200-204F after cooler.

On August 24, 2019 at 12:13 AM = "Andrew Martin andrew@martinag.com.au" = <flyrotary@lancaironline.net> wrote:

 

Rads are evap. cores modified for -12 hoses (from GM full sized PU = truck aprox. 2006), oil cooler is the Mazda RX7 cooler, upper eng. = filter boss cut off and bypassed, remote oil filter w/-10 hoses, =  rotor housings ok, rotors ok, E-shaft ok. One other note, Apex = seals only had one spring under each?, vids that I have seen they show a = long and a short spring, diff. design? David,,,,,,thanks for the = info.

On August 23, 2019 at 12:58 PM "Matt = Boiteau mattboiteau@gmail.com" < flyrotary@lancaironline.net> wrote: =

https://chipsmotorsports.com/ is in Detroit. = Can lap and renitride the irons. Are your rotor housing = okay?

 

Out= of curiosity, what size rads do you have for coolant and oil = ?

 

- = Matt Boiteau

O= n 2019-08-23 12:54:26 PM, David COOK hoursaway1@comcast.net <flyrotary@lancaironline.net> = wrote:

Am in need of info., where to send my irons ( all three), to be = lapped or resurfaced, (or purchase some replacements) this is a 13B so = the coolant seal grooves are in the irons.  I am in Lansing = Michigan for distance reference. This was supposed to be a = "professional" built eng. w/aviation mods. the mods are ok, = but the wear in the irons in the combustion area looks more like MANY = hrs. of use. I only put 80 hrs. on the hobbs. 20 was ground testing the = rest in the air.  Temps ran 190F coolant, 202F oil, pretty regular. =   Lubrication was 1oz. 2cyc.oil and 1/2 oz. MMOil for every gal. = fuel.  On prep for Osh. trip the next day, wanted some T&G's, = runup normal very strong could not hold back with brakes, aprox. 90% = throttle about foot off runway started missing, set back down and at = turn off to taxiway eng. quit running, had to lean EC2 all the way to = left to get started again. Checked EM2 bar graph, all in center so not = fuel MAP scramble. Thinking SAG (never experienced before so don't know = the symptoms)  changed plugs, no joy, tested coils, all ok, checked = comp. no needle jump on 2 chambers, dissassem. found broken chunk from = Apex seal rotor #2. Done crying now need to fix (short summer). David R. = Cook RV6A Rotary  Lansing = MI


 

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