Return-Path: Received: from S2.cableone.net ([24.116.0.228] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 763954 for flyrotary@lancaironline.net; Mon, 28 Feb 2005 23:27:47 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.116.0.228; envelope-from=crayd@cableone.net Received: from chuckathlon (unverified [24.117.230.176]) by S2.cableone.net (CableOne SMTP Service S2) with ESMTP id 11906191 for ; Mon, 28 Feb 2005 21:36:26 -0700 Return-Path: From: "Chuck Dunlap" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: FW: Cooling system update Date: Mon, 28 Feb 2005 21:27:26 -0700 Message-ID: <000c01c51e16$f9491fc0$e401a8c0@chuckathlon> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01C51DDC.4CEA47C0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.3416 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2739.300 X-IP-stats: Incoming Last 0, First 22, in=5, out=0, spam=0 X-External-IP: 24.117.230.176 X-Abuse-Info: Send abuse complaints to abuse@cableone.net This is a multi-part message in MIME format. ------=_NextPart_000_000D_01C51DDC.4CEA47C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello Ed! I am using 50/50 Prestone and distilled water, actually I have used drinking water as it is getting harder to find distilled water at the local grocery stores. I have never used tap water, I figure drinking water would not have enough minerals to show up in the radiator.=20 I hope to make it to Sun-n-fun, seems I have been making the trip on odd numbered tears, not intentionally... =20 Chuck -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed Anderson Sent: Monday, February 28, 2005 5:12 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: FW: Cooling system update Thanks for the report, Chuck =20 Just out of curiosity, what is your coolant composition - brand of antifreeze used? Distilled water for coolant? Tap water? =20 I agree, I keep a log of every flight with things like EGT, coolant and oil temps along with fuel flow, airspeed, altitude, OAT recorded every 15 -30 minutes. Well, I no longer log EGT as it has not changed in 260 hours except when I tried a muffler experiment that produced too much back pressure. =20 Any chance we will see you at Sun & Fun this year?? =20 Ed A ----- Original Message -----=20 From: Chuck Dunlap=20 To: Rotary motors in aircraft =20 Sent: Sunday, February 27, 2005 11:28 PM Subject: [FlyRotary] FW: Cooling system update =20 =20 My coolant temperature has been rising little by little over the 440 hours I have been flying my 13B. Last summer on the way to Arlington fly-in, I departed St George Utah at 100 degrees OAT and the coolant temp quickly rose to 230, my absolute maximum allowable. I could not climb above pattern altitude, so I landed. I cobbled together a water dribble system out of drip irrigation tubing, and it allowed me to continue the trip. After returning home I decided something had to be done. After checking everything I could think of, I removed the radiator, and after careful inspection, I found debris clogging much of the core that was visible. Some of it was bits of silicone used to help seal the couplings, and some of it looked like scale from the water jackets.I cleaned out as much as I could get to, and I made a screen out of stainless mesh and inserted in line inside one of the 1 1/2" silicone hose couplings. I flew it like that for about 10 hours while I had a new radiator made by Griffin Radiator. Coolant temps were better, but still not acceptable. I got the new radiator installed yesterday, and I found the screen already 3/4 clogged with more scale debris.=20 Today I flew it with the new radiator, and at OAT of about 65 F a full power climb out at 80 KIAS resulted in the coolant temp stabilizing at 167 F. I am not running a thermostat, and part throttle cruise coolant temp was about 130F. Descending out of 10000 ft the coolant temp dropped to about 110F, and my cabin heat was practically nil. Looks like I need cowl flaps now! I am actually looking forward to some 100 degree days this summer to see how it cools now. If a 35 degree rise in OAT results in the same rise in coolant temp, I predict that my max coolant temp will not go above 202 F. My coolant temp rise problem has been so gradual, while other things were being changed around, that the possibility of a clogged radiator did not even cross my mind. Lessons learned: 1. Keep good flight data and refer to if often, the only way to catch gradual trends. 2. A cooling system in an aircraft definitely needs some sort of screen or filter. I may try one of these http://www.babymall.com.au/tefba/ 3. 230 F does not seem to have hurt my 13B, I have probably 10 total hours flying at that temp. =20 Keep the shiny side up! =20 Chuck Dunlap N616RV 13B ------=_NextPart_000_000D_01C51DDC.4CEA47C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Hello=20 Ed!  I am using 50/50 Prestone and distilled water, actually I have = used=20 drinking water as it is getting harder to find distilled water at the = local=20 grocery stores. I have never used tap water, I figure drinking water = would not=20 have enough minerals to show up in the radiator.
I hope=20 to make it to Sun-n-fun, seems I have been making the trip on odd = numbered=20 tears, not intentionally...
 
Chuck
-----Original Message-----
From: = Rotary motors in=20 aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ed=20 Anderson
Sent: Monday, February 28, 2005 5:12 = AM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Re: FW: = Cooling=20 system update

Thanks for the report, = Chuck
 
Just out of curiosity, what is your = coolant=20 composition - brand of antifreeze used? Distilled water for coolant? = Tap=20 water?
 
I agree, I keep a log of every flight = with things=20 like EGT, coolant and oil temps along with fuel flow, airspeed, = altitude, OAT=20 recorded every 15 -30 minutes.  Well, I no longer log EGT as it = has not=20 changed in 260 hours except when I tried a muffler experiment that = produced=20 too much back pressure.
 
Any chance we will see you at Sun = & Fun this=20 year??
 
Ed A
----- Original Message -----
From:=20 Chuck=20 Dunlap
To: Rotary motors in = aircraft=20
Sent: Sunday, February 27, = 2005 11:28=20 PM
Subject: [FlyRotary] FW: = Cooling system=20 update

 

 
My = coolant=20 temperature has been rising  little by little over the 440 = hours I have=20 been flying my 13B. Last summer on the way to Arlington fly-in, I = departed=20 St George Utah at 100 degrees OAT and the coolant temp quickly rose = to 230,=20 my absolute maximum allowable. I could not climb above pattern = altitude, so=20 I landed. I cobbled together a water dribble system out of drip = irrigation tubing, and it allowed me to continue the trip. After = returning=20 home I decided something had to be done. After checking everything I = could=20 think of, I removed the radiator, and after careful inspection, I = found=20 debris clogging much of the core that was visible. Some of it = was bits=20 of silicone used to help seal the couplings, and some of it looked = like=20 scale from the water jackets.I cleaned out as much as I could get = to, and I=20 made a screen out of stainless mesh and inserted in line inside one = of the 1=20 1/2" silicone hose couplings. I flew it like that for about 10 hours = while I=20 had a new radiator made by Griffin Radiator. Coolant temps were = better, but=20 still not acceptable. I got the new radiator installed = yesterday, and I=20 found the screen already 3/4 clogged with more scale debris.=20
Today I flew it=20 with the new radiator, and at OAT of about 65 F a full power = climb out=20 at 80 KIAS resulted in the coolant temp stabilizing at 167 F. I am = not=20 running a thermostat, and part throttle cruise coolant temp was = about 130F.=20 Descending out of 10000 ft  the coolant temp dropped to about = 110F, and=20 my cabin heat was practically nil. Looks like I need cowl flaps now! = I am=20 actually looking forward to some 100 degree days this summer to see = how it=20 cools now. If a 35 degree rise in OAT results in the same rise in = coolant=20 temp, I predict that my max coolant temp will not go above 202=20 F.
My = coolant temp=20 rise problem has been so gradual, while other things were being = changed=20 around, that the possibility of a clogged radiator did not even = cross my=20 mind.
Lessons learned:=20 1. Keep good flight data and refer to if often, the only way to = catch=20 gradual trends.
2. = A cooling=20 system in an aircraft definitely needs some sort of screen or = filter. I may=20 try one of these http://www.babymall.com.au/tef= ba/
3. = 230 F does=20 not seem to have hurt my 13B, I have probably 10 total hours flying = at that=20 temp.
 
Keep the shiny=20 side up!
 
Chuck=20 Dunlap
N616RV=20 13B
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