REFLECTOR: Oil cooler (FG)

[Doug Kanczuzewski]

I also run a single Positech in the nose and my oil temp is in the 170's running an IO-540 turbo. High temp's on CHT's but finally getting those under control, but oil temp has not been a problem.

Doug

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Scott Derrick
Sent: Sunday, August 19, 2012 6:44 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Oil cooler (FG)

I'm running an IO520 with a single nose mounted cooler, a Positech  42119NM.  This is a fairly large cooler.  I know of another big 6 Cont. running this way.

My temps in summer cruise run 190-200F, in winter I have to block off a bit of the cooler with cardboard to keep the temps above 180, otherwise they run 170-180.

If you want more cooling use a larger inlet scoop, mine is the standard scoop for the STD, which is really too small for this size cooler. I also have a oil cooler flap that can be opened and partially closed to regulate the air through the cooler.

Scott
-------- Original Message --------
Subject: Re: REFLECTOR: Oil cooler (FG)
From: Patrick Sieders <pjsieders at comcast.net><mailto:pjsieders at comcast.net>
To: 'Velocity Aircraft Owners and Builders list' <reflector at tvbf.org><mailto:reflector at tvbf.org>
Date: 08/18/2012 03:37 PM
Hello Crowd,

So here is my setup, my plan, questions, and hopefully some wisdom from y'alls side.

I have a IO-540-J4A5 Lycoming, coming off of an Aztec. 250HP Turbo normalized. Since it came firewall forward, I ended up with the oil cooler, which seems to be a NDM 20104A. In a normal situation, that would be sufficient, but since we fly these engines backwards, with minimal cooling, I believe an extra cooler will be needed.

At this point I am thinking to place this cooler (the one I have) up front, and add a smaller one in the engine compartment. Mind you there is a turbo back there with extra heat, so it would not be as efficient as on normal setups.

OR..

Should I wait with installing a second one and try it with one first ?

OR..

Should I divide the coolers, i.e. getting two new ones, one up front and one in the back ?

I know this is not all very scientific, but some forward thinking is required, and I want to see what steps I might have missed.

Patrick Sieders
Nashville TN





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