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Ok, Kelly, if I understand your reading of the
situation, is that if you put the oil filter before the cooler and its normal
flow route (through the oil filter medium) gets plugged up by trash from
the engine, then the pressure by pass is more likely to open and the trash will
flow to the cooler. Makes sense to me, that could happen if the oil filter
has a substantial reduction in flow through its filter medium building up
pressure until the by-pass opens.
Now if you put the filter after the cooler, it
appears to me two things could happen:
1. The cooler could act like a filter
and stop a lot (or sufficient) trash from reaching the oil filter and preventing
the by-pass from opening and spreading trash to your engine. Although if
your engine is already trashed, I'm not certain what this does for you except
ensure you have put trash into your cooler.
2. The cooler will flow most of the trash
through to the oil filter in which case we are in a similar situation as having
the oil filter before the cooler. Except you have again ensured the cooler
will have still have trash.
So I still see no great advantage to putting the
oil filter after the cooler - but, as I said before, I would go with Lynn's
experience before my analysis {:>)
Ed
----- Original Message -----
Sent: Monday, April 07, 2008 10:28
AM
Subject: [FlyRotary] What comes first;
the chicken or the egg?
Ed, Lynn and All,
The way I understood Lynn's reply was as
follows........The oil
cooler has more flow capacity than the oil filter (at least a
single
filter that most of us use).........The restriction caused by putting
the filter before the cooler has the potential of allowing the
bypass
of the filter to open (pressure differential due to the lower flow
capacity of the filter) thereby allowing trash captured by the
filter
to flow through the cooler and on to the engine........By locating
the filter after the cooler the chance of this occurring is much
less
because of lower flow demands of the engine bearing
system.......
Hope this makes sense.........Is that
anywhere near to what you
were talking about Lynn ??
--
Kelly Troyer
"Dyke Delta"_13B
ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold
--------------
Original message from "Ed Anderson" <eanderson@carolina.rr.com>:
--------------
> Basically, my understanding is that the
filter would keep any thrash from a
> blown engine from entering the
cooler - which as many have pointed out is
> almost impossible to get
clean of all possible debris. I am not certain why
> this apparently
can not be counted on to stop the trash, but I will
> certainly defer
to Lynn and those with a lot more experience in trashing
> engines
than I have.
>
> So its understandably that the racing crowd
pushing engines into the very
> high power and rpm range stand a
higher probability of trashing an engine
> than in aircraft
application.
>
> In any case, have not trashed an engine to
the point of finding metal in the
> oil (yet).
>
> Ed
> ;
>
> ----- Original Message -----
> From:
> To: "Rotary motors in aircraft"
> Sent: Sunday, April 06, 2008 9:46 PM
> Subject: [FlyRotary] Re: What comes first; the chicken or the egg?
>
>
> >
> >
> > I am happy that
this has worked out for you. Why did you decide to run
> > the
filter before the cooler?
> >
> >
> >
>
>
> > -------------- Original message ----------------------
> > From: "Ed Anderson"
>
>> I have my oil filter before the oil goes into the cooler and has
worked
> >> fine
> >> for 400 hours.
>
>>
> >> Ed
> >>
> >> Ed
Anderson
> >> Rv-6A N494BW Rotary Powered
> >>
Matthews, NC
> >> eanderson@carolina.rr.com < BR>>
>> http://www.andersonee.com
> >>
http://members.cox.net/rogersda/rotary/configs.htm#N494BW
> >>
http://www.dmack.net/mazda/index.html
> >> ----- Original
Message -----
> >> From:
>
>> To: "Rotary motors in aircraft"
> >> Sent: Sunday, April 06, 2008
8:00 PM
> >> Subject: [FlyRotary] What comes first; the chicken
or the egg?
> >>
> >>
> >> > The
Mazda manual shows the oil being cooled via the oil cooler before
>
>> > it
> >> > is filtered. One would assume that
you would want the oil filtered
> >> > before
>
>> > you ran it through anything. Why did they design it this way?
What
> >> > are
> >> > most doing? Are you
cooling the oil before filtering or are you
> >> > filtering
> >> > the oil before cooling? If one was to stick to the
original design and
> >> > utilize the original oil pressure
outlet as the oil supply feed to the
> >> > re-drive, it
would appear that this oil supply to the re-drive is
> >> >
un-filtered oil although the oil is cooled. I would assume that we
>
>> > would
> >> > want filtered oil to the
re-drive. I am not sure how to tackle this
> >> > problem.
Any and all input into this subject is greatly appreciated.
>
>> >
> >> > --
> >> > Homepage:
http://www.flyrotary.com/
> >> > Archive and UnSub:
>
>> > http://mail.lancaironline.net:81/lists/flyrotary/List.html
> >> >
> >>
> >>
> >>
--
> >> Homepage: http://www.flyrotary.com/
> >>
Archive and UnSub:
> > >
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> >
> >
> > --
> > Homepage:
http://www.flyrotary.com/
> > Archive and UnSub:
> >
http://mail.lancaironline.net:81/lists/flyrotary/List.html
> >
>
>
> --
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