X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao103.cox.net ([68.230.241.43] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3818942 for flyrotary@lancaironline.net; Wed, 19 Aug 2009 23:30:55 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.43; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo02.cox.net ([70.169.32.72]) by fed1rmmtao103.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20090820033011.CVCO11920.fed1rmmtao103.cox.net@fed1rmimpo02.cox.net> for ; Wed, 19 Aug 2009 23:30:11 -0400 Received: from wills ([68.105.80.138]) by fed1rmimpo02.cox.net with bizsmtp id WTW81c00H2z3ATG04TWAkp; Wed, 19 Aug 2009 23:30:10 -0400 X-VR-Score: -100.00 X-Authority-Analysis: v=1.0 c=1 a=zXPluSP2E2gA:10 a=oCcaPWc0AAAA:8 a=5FFqE8RJtt2p6YriqV4A:9 a=2yKFBHsLnpSzFUl--fQA:7 a=YL3lZu3DpwnEBK_4gMIDpOYLowoA:4 a=o2QoyYduAAAA:8 a=Ia-xEzejAAAA:8 a=kviXuzpPAAAA:8 a=kHqjBsvrTfK8INiv6O0A:9 a=zL44Kul-jQrcfpQu9O8A:7 a=zQop3j7tzQdo5F3wamj38mqlMwcA:4 a=d-1ze5jHbJEA:10 a=TlnOPt13aEMA:10 a=EzXvWhQp4_cA:10 a=4vB-4DCPJfMA:10 X-CM-Score: 0.00 Message-ID: <9E95EA6370ED4C99BEDDD7C7086C3B66@wills> From: "Mike Wills" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: back in the air Date: Wed, 19 Aug 2009 20:30:09 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_005F_01CA210B.D8B88A50" 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 This is a multi-part message in MIME format. ------=_NextPart_000_005F_01CA210B.D8B88A50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I seriously considered a water oil exchanger. Fluidyne also made some of = those that looked really good. Dont know if they still do. Ultimately decided not to go that route. So many people were having = cooling issues when I was designing my system and it seemed that using = seperate air oil exchangers would ease potential debug hassles. I'm mostly happy with my choice. Its working well so far. And using a = $25 wrecking yard RX-7 oil cooler was about as cheap as it gets. My only = complaints so far are that I am not real happy with the looks of the = extra scoop I added for the oil cooler, and my braided stainless oil = cooler lines are fairly long and heavy. I probably will redo the cowl somewhere down the road after I get a good = handle on just how well the cooling is on hot days. So far its looking = like I could stand to shrink both inlets a little - maybe a lot. On my = flight the other day coolant temp never went over 180. And that included = taxi from the extreme west end of the airport to the other end of an = 8000' runway. Mike Wills RV-4 N144MW ----- Original Message -----=20 From: MONTY ROBERTS=20 To: Rotary motors in aircraft=20 Sent: Wednesday, August 19, 2009 6:58 AM Subject: [FlyRotary] Re: back in the air Mike, Great to hear you are flying again. I don't know if you have seen some of the new water/oil heat = exchangers?. They mount in the tank of the water radiator. The preferred = installation would be a dual pass water rad where the front tank is = divided. The water flows through 1/2 of the radiator and gets cooled = off. Then it flows through the end tank past the oil cooler picking up = heat. Then it flows back through the second half of the radiator and = gets cooled off again and finally gets returned to the engine. This = solves the "which hose do I put the oil cooler in" dilemma. It also can = greatly simplify the ductwork and make the radiator more efficient. If = you are thinking about re-doing your cowl, it might solve some of your = problems.=20 Monty ----- Original Message -----=20 From: Mike Wills=20 To: Rotary motors in aircraft=20 Sent: Wednesday, August 19, 2009 12:01 AM Subject: [FlyRotary] back in the air Finally. I'm confident that the reseat of the B controller chip = solved my problem with spontaneous loss of data. I flew for 1.5 hours = last friday. Engine running great and staying cool. Minor issues with = the radio, landing gear shimmy on the landing, and still dont have the = rudder trim right. But getting closer. Hope to get serious now about = getting this thing working now that summer (and the soaring season) are = winding down. Too many hobbies. Mike Wills RV-4 N144MW -------------------------------------------------------------------------= --- No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 8.5.392 / Virus Database: 270.13.61/2312 - Release Date: = 08/18/09 18:05:00 ------=_NextPart_000_005F_01CA210B.D8B88A50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I seriously considered a water oil = exchanger.=20 Fluidyne also made some of those that looked really good. Dont know if = they=20 still do.
 
Ultimately decided not to go that = route. So many=20 people were having cooling issues when I was designing my system and it = seemed=20 that using seperate air oil exchangers would ease potential debug=20 hassles.
 
I'm mostly happy with my choice. Its = working well=20 so far. And using a $25 wrecking yard RX-7 oil cooler was about as cheap = as it=20 gets. My only complaints so far are that I am not real happy with the = looks of=20 the extra scoop I added for the oil cooler, and my braided stainless oil = cooler=20 lines are fairly long and heavy.
 
I probably will redo the cowl somewhere = down the=20 road after I get a good handle on just how well the cooling is on hot = days. So=20 far its looking like I could stand to shrink both inlets a little - = maybe a lot.=20 On my flight the other day coolant temp never went over 180. And that = included=20 taxi from the extreme west end of the airport to the other end of an = 8000'=20 runway.
 
Mike Wills
RV-4 N144MW
----- Original Message -----
From:=20 MONTY ROBERTS
Sent: Wednesday, August 19, = 2009 6:58=20 AM
Subject: [FlyRotary] Re: back = in the=20 air

Mike,
 
Great to hear you are flying = again.
 
I don't know if you have seen some of = the new=20 water/oil heat exchangers?. They mount in the tank of the water = radiator. The=20 preferred installation would be a dual pass water rad where the front = tank is=20 divided. The water flows through 1/2 of the radiator and gets cooled = off. Then=20 it flows through the end tank past the oil cooler picking up heat. = Then it=20 flows back through the second half of the radiator and gets cooled off = again=20 and finally gets returned to the engine. This solves the "which hose = do I put=20 the oil cooler in" dilemma. It also can greatly simplify the ductwork = and make=20 the radiator more efficient. If you are thinking about re-doing your = cowl, it=20 might solve some of your problems.
 
Monty
----- Original Message -----
From:=20 Mike = Wills=20
To: Rotary motors in = aircraft=20
Sent: Wednesday, August 19, = 2009 12:01=20 AM
Subject: [FlyRotary] back in = the=20 air

Finally. I'm confident that the = reseat of the B=20 controller chip solved my problem with spontaneous loss of data. I = flew for=20 1.5 hours last friday. Engine running great and staying cool. Minor = issues=20 with the radio, landing gear shimmy on the landing, and still dont = have the=20 rudder trim right. But getting closer. Hope to get serious now about = getting=20 this thing working now that summer (and the soaring season) are = winding=20 down. Too many hobbies.
 
Mike Wills
RV-4 N144MW


No virus found in this incoming message.
Checked by = AVG -=20 www.avg.com
Version: 8.5.392 / Virus Database: 270.13.61/2312 - = Release=20 Date: 08/18/09 18:05:00
------=_NextPart_000_005F_01CA210B.D8B88A50--