First time was a night run (3am) delivering parts, over mountains, in the 
winter. The oil congealed in the oil cooler. Outside temp was below -40 deg. 
Very high oil temp, very low pressure. It was so cold outside, could not heat 
cabin. ?Had frost on inside from my breath. Was close to having to shut down an 
engine. 2 other pilots I know, had the same thing happen that same night. 
Freaky cold.2nd time, I had an oil seal blow. Oil all over the plane. Pulled 
engine to idle and got down fast ( I was in a single engine plane). Airport was 
10 miles in front of me when it happened.Also lost an engine on takeoff due to 
carb ice. Just hasn't been my time to die I guess.The point I have been trying 
to make about the heads and oil topic was. We are pushing the engine beyond 
what was designed to do. It has been taken as far as it can go without a 
complete redesign. That would mean a new engine never on the ?market. 
Everything you do in one place, affects something else. ?And that "something 
else" is what will kill you.


Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------
From: Brian C Wagner via KRnet <krnet at list.krnet.org> 
List-Post: krnet@list.krnet.org
Date: 05/01/2016  11:32  (GMT-05:00) 
To: KRnet <krnet at list.krnet.org> 
Cc: Brian C Wagner <brianw at siu.edu> 
Subject: Re: KR> FW:  Type 1 Cylinder Heads - cooling 

There isn't much surface area on a sump, compared to the volume of oil it 
contains. Also, located on the bottom of the engine, the air flow is 
questionable. Sure, you lose a little heat with those piddly fins on there, but 
it's not its prime function. An oil cooler system with proper air flow is the 
only way you'll get rid of most oil heat in an air-cooled engine.

I'm not advocating a higher-volume oil pump. At least, not without addressing 
the oil system as a whole. Just dropping one in and expecting it will somehow 
"help" is just asking for trouble.

If you start losing oil out of an engine, it isn't going to make a difference 
what volume the oil pump is. When you lose oil *pressure*, it's just a matter 
of (not much) time before the engine seizes. Why did you lose engines twice?



________________________________
From: Gary Hinkle <Gary19521 at verizon.net>
Sent: Saturday, April 30, 2016 9:43 PM
To: KRnet
Cc: Brian C Wagner
Subject: Re: KR> FW: Type 1 Cylinder Heads - cooling

The sump is not the worst place to shed heat. Do the math and look at how many 
square inchs of surface there is. Why do you think there are fins on the sump? 
Not only that, the heat is wicked around the entire crank case. This is why the 
top of the case gets hot. The oil cools the crank, rods, pistons, valves,? and 
so on. The heads aren't the only path for heat transfer.
And yes, I use a cooler. Look up the amount of Btus that a cooler can shed per 
Sq in. You may be surprised how limited it is. I'm not trying to be a pain. But 
if someone is going to all the work to pump a large volume of oil into the 
heads, for which it was never designed to handle, they most likely could be 
landing when they don't want to due to engine failure. Have you ever flown an 
airplane with oil comming out of the engine at a high rate. I have, and you 
will have one heck of a pucker factor.
And I have lost engines in flight twice.
Pumping extra oil into the heads would be best be done in a test cell for many 
hours of running to get it right. If at all.



Sent from my Verizon Wireless 4G LTE smartphone


-------- Original message --------
From: Brian C Wagner via KRnet <krnet at list.krnet.org>
List-Post: krnet@list.krnet.org
Date: 04/30/2016 09:29 (GMT-05:00)
To: KRnet <krnet at list.krnet.org>
Cc: Brian C Wagner <brianw at siu.edu>
Subject: Re: KR> FW: Type 1 Cylinder Heads - cooling

I'm sorry, but this is wrong. The sump is the worst place for cooling to 
happen. Heat is radiated away only at that relatively small amount of surface 
area, per volume of oil.
I'm not familiar with VW aircraft installations. Are you using an oil cooler of 
any type? A car installation includes the integral cooler that air is forced 
through. It is there, and throughout the engine's radiating surface, where heat 
is exchanged to the air.

________________________________________
From: KRnet <krnet-bounces at list.krnet.org> on behalf of Gary Hinkle via 
KRnet <krnet at list.krnet.org>
Sent: Friday, April 29, 2016 9:52 PM
To: KRnet
Cc: Gary Hinkle
Subject: Re: KR> FW:? Type 1 Cylinder Heads - cooling

While everyone is toying with extra oil to cool the heads. Don't forget, you 
would pull more oil from the sump. Which would leave less to be cooled. Leading 
to hotter oil, hotter heads.This is a bad idea. Period! The engineering to 
fugure out the amount of oil needed in sump, out put of pump, thermal shed, and 
so on, is way beyond anything worth doing for the amount of return.Power = 
temperature. This little engine is pretty much putting out all it can, and 
still remain reliable. NASCAR doesn't use Detroit engines from production cars. 
They are specially designed just for that class car and special usage.I don't 
want to seem like a poop. It's just how it is.Gary Hinkle. Corp, Cargo pilot, 
and seems like forever A&P.


Sent from my Verizon Wireless 4G LTE smartphone

-------- Original message --------
From: Chris Prata via KRnet <krnet at list.krnet.org>
List-Post: krnet@list.krnet.org
Date: 04/27/2016? 02:40? (GMT-05:00)
To: krnet at list.krnet.org
Cc: Chris Prata <chrisprata at live.com>
Subject: KR> FW:? Type 1 Cylinder Heads - cooling

thats an interesting angle. your oil post also reminded me I was going to ask 
about *additional* oil to cool the heads, as in a high vol oil pump, and an oil 
line to each head spraying oil on the hottest area (between the valves?).
would that almost make them "liquid cooled heads"?

List-Post: krnet@list.krnet.org
Date: Tue, 26 Apr 2016 12:28:29 -0500
Subject: Re: KR> Type 1 Cylinder Heads
From: lrffrench at gmail.com
To: krnet at list.krnet.org
CC: chrisprata at live.com



Hi KR league,? of all the discussions that are so important about controlling 
heat, I am surprised that so little discussion of oil happens. This is a big 
decision. My research for my 1835 vw and oil has led me to Quaker State DEFY.? 
I am running the 10w30 and the API-SL class. This is a semi- synthetic with 
boosted zinc for anti-friction. In aircraft we can't use a full synthetic 
because lead in av-gas will destroy the anti-friction adds in the pure 
synthetics. Even if we plan to use mogas primarily, there may be the need to 
use av-gas all of which have high lead.? The molecule size in synthetics, even 
the blends, is smaller and is known to run cooler. Note:? Quaker State DEFY is 
in almost identical containers with API-SN class oil. (Strange).? SN doesn't 
have the boosted Zinc. You have to read the small print to get API-SL. The SN 
class has been made for the auto engines with catalytic converters because the 
high zinc has been known to ruin the catalytic converters. Since aviation
does use them (yet), we can benefit from the zinc friction reduction. Hope this 
isn't noise on many of the great signals I read everyday from you 
pros.Cheers,Rene Ffrench N44774. Austin, Texas


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