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Date: Thu, 3 Feb 2005 10:22:10 -0500
Subject: Re: [FlyRotary] Re: Oil Filters
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From: Jerry Hey <jerryhey@earthlink.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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On Thursday, February 3, 2005, at 10:09  AM, Ernest Christley wrote:

> Russell Duffy wrote:
>
>> No big surprises here.  From this simple test, I feel very good about 
>> my decision to go with the larger remote filter.     I guess the real 
>> question is what real benefit we get from this extra size?  I don't 
>> think we'll fill up the small filter in the short times that we go 
>> between oil changes, so I don't see that as a factor.  The larger 
>> filter will certainly flow more oil on a test rig, but since we're 
>> forcing all the oil through about a 1/4" hole in the engine anyway, 
>> will a super flow filter make any practical difference?
>
>
> IN THEORY...
>
> You want the oil to move as slowly as possible through the filter.  
> The harder you push it through, the more particle will be forced 
> through.  The extreme case is the 'toilet paper roll' filters I here 
> about every now and again.
>
> IN PRACTICE...
>
> My guess is that if you're so strapped for cash that you have to run 
> oil dirty enough to make a difference, things are already beyond the 
> point of precipitous drop-off.
>
>>>  Homepage:  http://www.flyrotary.com/
>>>  Archive:   http://lancaironline.net/lists/flyrotary/List.html

Why is it that the oil remains so clean?  After a couple thousand miles 
in my RX 7 the oil is still red, and transparent.  If any engine did 
not need an oil filter at all, this would be it.  Not that I am 
suggesting running without one.   Jerry

jerryhey@earthlink.net

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On Thursday, February 3, 2005, at 10:09  AM, Ernest Christley wrote:


<excerpt>Russell Duffy wrote:


<excerpt>No big surprises here.  From this simple test, I feel very
good about my decision to go with the larger remote filter.     I
guess the real question is what real benefit we get from this extra
size?  I don't think we'll fill up the small filter in the short times
that we go between oil changes, so I don't see that as a factor.  The
larger filter will certainly flow more oil on a test rig, but since
we're forcing all the oil through about a 1/4" hole in the engine
anyway, will a super flow filter make any practical difference?

</excerpt>


IN THEORY...


You want the oil to move as slowly as possible through the filter. 
The harder you push it through, the more particle will be forced
through.  The extreme case is the 'toilet paper roll' filters I here
about every now and again.


IN PRACTICE...


My guess is that if you're so strapped for cash that you have to run
oil dirty enough to make a difference, things are already beyond the
point of precipitous drop-off.


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

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

</excerpt></excerpt></excerpt>

Why is it that the oil remains so clean?  After a couple thousand
miles in my RX 7 the oil is still red, and transparent.  If any engine
did not need an oil filter at all, this would be it.  Not that I am
suggesting running without one.   Jerry

<fontfamily><param>Palatino</param>

jerryhey@earthlink.net</fontfamily>


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