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From: <daveleonard@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: high oil pressure and coolers
Date: Sun, 12 Sep 2004 22:27:07 -0400
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Sorry Ed, My mistake.
Dave
do not archive

> 
> Yeah! Dave those are fighting words. {:>).
> 
>  Actually, I started out with a non-Mazda oil cooler which did not do the
> job which relates to all the tales of Woe about my oil cooling.  I then
> switched to the Stock Mazda oil cooler and put it up under the spinner and
> have had fine cooling ever since.  Not to say there are not equal or better
> coolers out there, but the performance of my oil cooler with a 22 sq inch
> inlet opening has worked fine for my power output.  I think that moving the
> position of the cooler from near the firewall where its exit flow was
> hindered up under the spinner was probably what really did the job.
> 
> Ed
> .
> Ed Anderson
> RV-6A N494BW Rotary Powered
> Matthews, NC
> ----- Original Message ----- 
> From: "David Carter" <dcarter@datarecall.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Sunday, September 12, 2004 7:51 PM
> Subject: [FlyRotary] Re: high oil pressure and coolers
> 
> 
> > Dave,
> >
> > Do you have photo(s) of your oil cooler and how air is ducted to it?  Ed's
> > initial problem was a duct that blasted most air thru one end of long
> cooler
> > and rest wasn't getting its "share" of air.
> >
> > I'm thinking "duct" is more important than "Setrab" or "Mazda" or "A/C
> > core".
> >
> > David
> >
> > ----- Original Message ----- 
> > From: <daveleonard@cox.net>
> > To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> > Sent: Sunday, September 12, 2004 11:58 AM
> > Subject: [FlyRotary] Re: high oil pressure and coolers
> >
> >
> > > Well, to be honest guys, the stock oil cooler does not work that well.
> > Most who use it, including Tracy and Ed, have dealt with significant
> > problems trying to cool their oil.  Both guys had to cut their first
> flights
> > short because of high oil temps, and both eventually had to do significant
> > tweaking of the oil cooling system.
> > >
> > > My setrab by comparison has cooled very well from first flight.  The
> > highest my oil temp has ever been was 192, and that was on an extended
> > climbout at 32"MAP and 90 KTS - coolant finally overheated.  In cruise my
> > oil temps run between 140 and 160.
> > >
> > > The Setrab also fit better under the cowl, is readily available and
> comes
> > with any size AN or NPT or Metric fitting you want to use.  They cost 2-3
> > hundred bucks - not cheap but not super expensive.
> > >
> > > The "big book" is not a stone tablet.  Thank goodness for Tracy and Ed.
> > Without them I could never have considered doing this project.  But don't
> > forget that the "big book" also says to use a 2.17:1 plenary drive with 4
> > planets  ;-)
> > >
> > > So stop picking on Rusty.  What with the PTSD from that whole BUC
> > experience and a hurricane headed his way dosen't he have enough problems?
> > >
> > > Dave Leonard - Did a fly over at sevenstock yesterday, turned out great.
> > That is a great event for a rotor head.  Got to hear the 4 rotor leManz
> > (sp?) winner running as well as several other race cars.