Return-Path: Received: from mail.tsisp.com ([65.23.108.44] verified) by logan.com (CommuniGate Pro SMTP 4.2.2) with ESMTP-TLS id 424427 for flyrotary@lancaironline.net; Tue, 21 Sep 2004 15:47:20 -0400 Received-SPF: none receiver=logan.com; client-ip=65.23.108.44; envelope-from=steve@tsisp.com Received: from stevehome by mail.tsisp.com (Technical Support Inc.) with SMTP id CQA74584 for ; Tue, 21 Sep 2004 15:46:45 -0400 Reply-To: From: "Steve Brooks" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Still high temperature Date: Tue, 21 Sep 2004 15:48:34 -0400 Message-ID: <006d01c4a013$fb4d5ab0$6400a8c0@WORKGROUP.local> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_006E_01C49FF2.743BBAB0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2910.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_006E_01C49FF2.743BBAB0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Mark, I suspect that you are right about that. I'm going to replumb the header tank, and pull it out of the top of the thermostat housing by itself. Steve -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of Mark Steitle Sent: Monday, September 20, 2004 8:39 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Still high temperature Steve, If you'll accept a comment from someone who isn't flying (yet), I would like to make a suggestion. My 3-rotor had the same symptoms (gurgling in the purge tank) upon shutdown. My problem turned out to be a radiator supply line too close to the exhaust. It was fine as long as the coolant was circulating. As soon as I shut it down, the coolant would reach boiling point and it would spit and gurgle for about 5 minutes. I would be suspicious of the coolant lines to your turbo. Mark S. Subject: [FlyRotary] Still high temperature I would appreciate input to a problem that I have. I just overhauled the engine, and reworked the cooling system. I'm now using the A/C evaporator cores for radiators. The problem I'm having is, that when I take it up, I'm seeing coolant and oil temperature of about 210 degrees. That is climbing to pattern, leveling off, and throttling back to low power. The oil stays pretty much where it is, and the coolant come down just a couple of degrees. When throttle back to land, the coolant and oil both come down to about 180 at touchdown. I taxi back to the hanger and shut down with oil and coolant about 190-195, but after shut down, I get all sorts of gurgling noises from the header tank, which is fed by the tap on the side of the thermostat housing. The gurgling noises go on for 5-6 minutes, which would seem like the engine is overheated, but while hot, it doesn't seem overly hot. The other end of the header tank feeds coolant to the turbo, so maybe the hot water is coming from it ? Maybe my header tank should be fed differently ? Also at this time, after a short flight, there is only a couple of cups of additional coolant in the overflow tank. I assume that the higher than desired coolant temperature, and the gurgling noise are related. I pulled the water pump off today to double check it, and all seems OK. The pump only has about 10 hours on it. When I run it on the ground, and feel the radiators after shutdown, they are uniformly hot. I put a furnace blower pointed at the scoop, and I'm getting very even airflow through the radiators. The oil cooler, on the other hand, has about 75% of the air going through the middle of the cooler, so I'm going to have to add some deflectors in the plenum to push more air to the outside. That seems to be a less significant issue at the present. Any thoughts ? Steve Brooks Cozy MKIV Turbo rotary >> Homepage: http://www.flyrotary.com/ >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_006E_01C49FF2.743BBAB0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
Mark,
I=20 suspect that you are right about that.  I'm going to replumb the = header=20 tank, and pull it out of the top of the thermostat housing by = itself. =20
 
Steve
-----Original Message-----
From: Rotary motors in = aircraft=20 [mailto:flyrotary@lancaironline.net]On Behalf Of Mark=20 Steitle
Sent: Monday, September 20, 2004 8:39 = AM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Re: Still = high=20 temperature

Steve,
If you'll = accept a=20 comment from someone who isn't flying (yet), I would like to make a=20 suggestion.  My 3-rotor had the same symptoms (gurgling in the = purge=20 tank) upon shutdown.  My problem turned out to be a radiator = supply line=20 too close to the exhaust.  It was fine as long as the coolant was = circulating.  As soon as I shut it down, the coolant would reach = boiling=20 point and it would spit and gurgle for about 5 minutes.  I would = be=20 suspicious of the coolant lines to your turbo. 

Mark = S. =20




Subject: [FlyRotary] Still high=20 temperature

 

I = would=20 appreciate input to a problem that I have.  I just overhauled=20 the

engine, and = reworked the=20 cooling system.  I'm now using the A/C = evaporator

cores for radiators.  The = problem I'm=20 having is, that when I take it up, I'm

seeing coolant and oil = temperature of about=20 210 degrees.  That is climbing

to pattern, leveling off, and throttling back to low = power.  The=20 oil stays

pretty = much where=20 it is, and the coolant come down just a couple of = degrees.

 

When throttle back to land, the = coolant and=20 oil both come down to about 180

at touchdown.  I taxi back to the hanger and shut down = with oil=20 and coolant

about = 190-195,=20 but after shut down, I get all sorts of gurgling noises = from

the header tank, which is fed by = the tap on=20 the side of the thermostat

housing.  The gurgling noises go on for 5-6 minutes, = which would=20 seem like

the = engine is=20 overheated, but while hot, it doesn't seem overly hot. = The

other end of the header tank = feeds coolant to=20 the turbo, so maybe the hot

water is coming from it ? Maybe my header tank should be = fed=20 differently ?

Also at this=20 time, after a short flight, there is only a couple of cups=20 of

additional = coolant in the=20 overflow tank.

 

I = assume that=20 the higher than desired coolant temperature, and the=20 gurgling

noise = are=20 related.  I pulled the water pump off today to double check=20 it,

and all seems = OK. =20 The pump only has about 10 hours on it.  When I run it=20 on

the ground, = and feel the=20 radiators after shutdown, they are uniformly hot.

I put a furnace blower pointed at = the scoop,=20 and I'm getting very even

airflow through the radiators.  The oil cooler, on the = other=20 hand, has about

75% of the=20 air going through the middle of the cooler, so I'm going to=20 have

to add some = deflectors=20 in the plenum to push more air to the outside.  = That

seems to be a less significant = issue at the=20 present.

 

Any thoughts=20 ?

 

Steve Brooks

Cozy MKIV

Turbo rotary

 

 

>>  Homepage:  http://www.flyrotary.com/

>>  = Archive:   http://lancaironline.net/lists/flyrotary/List.html=
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