X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail07.syd.optusnet.com.au ([211.29.132.188] verified) by logan.com (CommuniGate Pro SMTP 5.0.9) with ESMTPS id 1095008 for flyrotary@lancaironline.net; Sat, 06 May 2006 22:37:29 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.132.188; envelope-from=lendich@optusnet.com.au Received: from george (d220-237-238-11.dsl.nsw.optusnet.com.au [220.237.238.11]) by mail07.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id k472adPY023362 for ; Sun, 7 May 2006 12:36:41 +1000 Message-ID: <000d01c6717f$1542c340$0beeeddc@george> From: "george lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: oil cooler lines Date: Sun, 7 May 2006 12:36:44 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000A_01C671D2.E5FBC0B0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_000A_01C671D2.E5FBC0B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bill, There must be there a way of balancing/ equalising the pressures and = flow through parallel radiators with the use of regulators or some such auto or = pre-set resistors or balance tubes etc. George (down under) ----- Original Message -----=20 From: wschertz@comcast.net=20 To: Rotary motors in aircraft=20 Sent: Sunday, May 07, 2006 9:49 AM Subject: [FlyRotary] Re: oil cooler lines Maybe -- maybe not. The hydraulic resistance for the two flow paths = may be different, then the flows will not be the same.=20 I have mine plumbed parallel, and took pains to make all hose = connections equal length. We will see when I get it started whether it = works as planned. Bill Schertz -------------- Original message --------------=20 From: Bulent Aliev =20 > Bill, I would think they will even out by equalizing the back=20 > pressure from the cooler?=20 > Buly=20 > On May 6, 2006, at 9:24 AM, wschertz@comcast.net wrote:=20 >=20 > > Buly,=20 > > You are correct that parallel coolers will be more efficient, IF = > > the liquid flow through the coolers are the same.=20 > > Bill Schertz=20 > >=20 > > -------------- Original message --------------=20 > > From: Bulent Aliev=20 > >=20 > > > I believe parallel coolers will be more efficient due to the = higher=20 > > > delta T. In a serial set up, the liquid in the second cooler = will be=20 > > > lower temp. and less efficient heat transfer will take place.=20 > > Jus t an=20 > > > opinion of an eyeball engineer?=20 > > > Buly=20 > > > On May 5, 2006, at 11:34 PM, Kelly Troyer wrote:=20 > > >=20 > > > > Bob,=20 > > > > One other comment........There is some difference of opinion = > > > > among the group=20 > > > > whether connecting coolers (oil or coolent) in series (as = you=20 > > > > propose) or in=20 > > > > parallel is the most efficient method.........We have group=20 > > members=20 > > > > currently=20 > > > > flying with both methods........Most that I am aware of that = use=20 > > > > both methods=20 > > &g t; > are for coolent systems as not many are using two oil=20 > > > > coolers........I personally=20 > > > > lean toward a parallel coolent system........Any comments = from=20 > > > > others in the=20 > > > > group about this question would be welcome as I know we have = > > > > several with=20 > > > > experience or training in this area !! What would be most=20 > > efficient=20 > > > > for one=20 > > > > system should probably apply to the other.......IMHO=20 > > > > --=20 > > > > Kelly Troyer=20 > > > > Dyke Delta/13B/RD1C/EC2=20 > > > >=20 > > > >=20 > > > >=20 > > > >=20 > > > > -------------- Original message from kenpowell@comcast.net:=20 > > > > --------------=20 > > > >=20 > > > > Bob,=20 > > > > I think you should have made the lines larger to help lower=20 > > presure=20 > > > > drop in the long lines. I understand that the extra oil in = the=20 > > > > lines will be heavy but the pressure drop would be a = tradeoff that=20 > > & gt; > I wouldn't want to make.=20 > > > >=20 > > > > Ken Powell=20 > > > > Bryant, Arkansas=20 > > > > 501-847-4721=20 > > > > C150 / RV-4 under construction=20 > > > >=20 > > > > -------------- Original message --------------=20 > > > > From: BMears9413@aol.com=20 > > > > I'm running two oil coolers in the Spitfire. Due to the = lengthe of=20 > > > > the lines and volume of the two coolers I reduced my oil = lines to=20 > > > > AN8 (I think stock they were 10?) Now, before I close=20 > > everything up=20 > > > > I'm having second guessing. My total line length will be = around=20 > > > > 12'. I had planned on running the lines to one oil cooler, = then=20 > > the=20 > > > > other, then back to the motor.=20 > > > > Any comments?=20 > > > >=20 > > > > Bob Mears=20 > > >=20 > > > Buly=20 > > > http://tinyurl.com/dcy36=20 > > >=20 > > >=20 > > >=20 > > >=20 > > > --=20 > > > Homepage: http://www.flyrotary.com/=20 > > > Archive and UnSub: http://ma = il.lancaironline.net/lists/flyrotary/=20 >=20 > Buly=20 > http://tinyurl.com/dcy36=20 >=20 >=20 >=20 >=20 > --=20 > Homepage: http://www.flyrotary.com/=20 > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ ------=_NextPart_000_000A_01C671D2.E5FBC0B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Bill,
There must be there a way of = balancing/=20 equalising the pressures and flow through
parallel radiators with the use of = regulators or=20 some such auto or pre-set resistors or balance tubes etc.
George (down under)
----- Original Message -----
From:=20 wschertz@comcast.net
Sent: Sunday, May 07, 2006 9:49 = AM
Subject: [FlyRotary] Re: oil = cooler=20 lines

Maybe -- maybe not. The hydraulic resistance for the two flow = paths may=20 be different, then the flows will not be the same.
 
I have mine plumbed parallel, and took pains to make all hose = connections=20 equal length. We will see when I get it started whether it works as=20 planned.
 
Bill Schertz
 
--------------=20 Original message --------------
From: Bulent Aliev=20 <atlasyts@bellsouth.net>

> Bill, I would think they = will=20 even out by equalizing the back
> pressure from the cooler? =
>=20 Buly
> On May 6, 2006, at 9:24 AM, wschertz@comcast.net = wrote:=20
>
> > Buly,
> > You are correct that = parallel=20 coolers will be more efficient, IF
> > the liquid flow = through the=20 coolers are the same.
> > Bill Schertz
> > =
> >=20 -------------- Original message --------------
> > From: = Bulent=20 Aliev
> >
> > > I = believe=20 parallel coolers will be more efficient due to the higher
> = > >=20 delta T. In a serial set up, the liquid in the second cooler will be =
> > > lower temp. and less efficient heat transfer will = take=20 place.
> > Jus t an
> > > opinion of an = eyeball=20 engineer?
> > > Buly
> > > On May 5, 2006, = at=20 11:34 PM, Kelly Troyer wrote:
> > >
> > > = >=20 Bob,
> > > > One other comment........There is some=20 difference of opinion
> > > > among the group =
> >=20 > > whether connecting coolers (oil or coolent) in series (as = you=20
> > > > propose) or in
> > > > = parallel is=20 the most efficient method.........We have group
> > = members=20
> > > > currently
> > > > flying = with both=20 methods........Most that I am aware of that use
> > > = > both=20 methods
> > &g t; > are for coolent systems as not = many are=20 using two oil
> > > > coolers........I personally =
>=20 > > > lean toward a parallel coolent system........Any = comments=20 from
> > > > others in the
> > > > = group=20 about this question would be welcome as I know we have
> > = >=20 > several with
> > > > experience or training in = this=20 area !! What would be most
> > efficient
> > = > >=20 for one
> > > > system should probably apply to the=20 other.......IMHO
> > > > --
> > > > = Kelly=20 Troyer
> > > > Dyke Delta/13B/RD1C/EC2
> > = >=20 >
> > > >
> > > >
> > = > >=20
> > > > -------------- Original message from=20 kenpowell@comcast.net:
> > > > -------------- =
> >=20 > >
> > > > Bob,
> > > > I = think you=20 should have made the lines larger to help lower
> > = presure=20
> > > > drop in the long lines. I understand that = the extra=20 oil in the
> > > > lines will be heavy but the = pressure drop=20 would be a tradeoff that
> > & gt; > I wouldn't = want to=20 make.
> > > >
> > > > Ken Powell =
>=20 > > > Bryant, Arkansas
> > > > 501-847-4721 =
> > > > C150 / RV-4 under construction
> > = >=20 >
> > > > -------------- Original message = --------------=20
> > > > From: BMears9413@aol.com
> > > = > I'm=20 running two oil coolers in the Spitfire. Due to the lengthe of =
> >=20 > > the lines and volume of the two coolers I reduced my oil = lines to=20
> > > > AN8 (I think stock they were 10?) Now, = before I=20 close
> > everything up
> > > > I'm having = second=20 guessing. My total line length will be around
> > > = > 12'. I=20 had planned on running the lines to one oil cooler, then
> = > the=20
> > > > other, then back to the motor.
> > = >=20 > Any comments?
> > > >
> > > > = Bob Mears=20
> > >
> > > Buly
> > >=20 http://tinyurl.com/dcy36
> > >
> > > =
> >=20 >
> > >
> > > --
> > > = Homepage:=20 http://www.flyrotary.com/
> > > Archive and UnSub: = http://ma=20 il.lancaironline.net/lists/flyrotary/
>
> Buly =
>=20 http://tinyurl.com/dcy36
>
>
>
> =
> --=20
> Homepage: http://www.flyrotary.com/
> Archive and = UnSub:=20 http://mail.lancaironline.net/lists/flyrotary/=20
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