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Oil drain down

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cpayne(at)joimail.com
Guest

Posted: Wed Feb 13, 2013 3:34 pm Post subject: Oil drain down

What's missing here is the fact that it works. Theory is one thing, results are another. Some Russians (Jurgis Kairys) have practiced this for years. Works for me too, no hydro lock yet and reduced drainage with pull through. Ask Pappy, he has one of my prototypes installed.



You can just catch it or ... you can slow it down and then catch a little, I do both.



Craig Payne

 	  Quote: 	
		  So OK!  If we're in agreement up to this point, my question is:  "How exactly does

putting the #1 cylinder to TDC *PREVENT* oil from getting past the rings and

into the cylinders?"  



My thought is that it does not.  And what really ends up happening by doing this

procedure is that drainage through the exhaust will indeed probably be greatly

reduced, but at the same time, the chance for hydraulic lock is greatly increased.

Which means of course, you have to pull the spark plugs to be sure. 

Which means of course, all that oil you saved from draining out the exhaust stacks,

now drains out the spark plug holes.  

What am I missing here?

 Mark

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mark.bitterlich(at)navy.m
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Posted: Thu Feb 14, 2013 2:53 pm Post subject: Oil drain down

Craig, 



I am very glad that it works.  I was not questioning your product, or the practice.  I was indeed asking for an explanation of why it works, and from your reply the only conclusion I can reach is that you do not know.       



You said: "Theory is one thing, results are another".  



These are Experimental Aircraft thus "experiments" are most definitely acceptable!  



Good luck with your experiment.  



Mark Bitterlich



p.s.  If anyone reading this can come up with an explanation, I'd certainly love to hear it.  Pappy?  Dennis?  George?  Doug?  Anyone?  I understand how it could reduce oil coming out the exhaust valves.  I do NOT understand how it would keep oil from leaking past the rings and INTO the cylinders, which HAS TO BE THE CASE if less oil comes out on pull through.  

--

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