Mailing List flyrotary@lancaironline.net Message #31702
From: <wschertz@comcast.net>
Subject: Re: [FlyRotary] Re: oil cooler lines
Date: Sat, 06 May 2006 23:49:39 +0000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Maybe -- maybe not. The hydraulic resistance for the two flow paths may be different, then the flows will not be the same.
 
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 --------------
From: Bulent Aliev <atlasyts@bellsouth.net>

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