Matronics Email Lists :: View topic - Oil Temperature Control

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Oil Temperature Control

Matronics Email Lists Forum Index -> TeamGrumman-List

View previous topic :: View next topic

Author Message

flyv35b(at)minetfiber.com
Guest

Posted: Tue Nov 08, 2011 6:45 am Post subject: Oil Temperature Control

I hate to change the subject about oil level but I recently made and 

installed a valve that will control the air flow to the inlet of the oil 

cooler on my O-320 powered Lynx.  When I installed this engine several 

years ago I wondered if the small stock AA-1C cooler would be adequate 

but decided to use it until testing proved otherwise.  It has worked 

well even at high ambient temperatures during extended climbs.  But my 

cooling with this engine is actually better than needed and during the 

cool weather here in the NW the oil temperature will not get up even 

close to 175F where there is half a chance of evaporating the moisture.  

I got tired of taping over the inlet to block part of the air flow so I 

fabricated a cockpit adjustable air valve to regulate the flow and 

therefore the oil temperature.  It's operated by a simple push-pull 

cable with a ratchet lock, much like th stock mixture cable.  A test 

flight a couple of days ago showed a 20F temperature reduction from no 

air flow through the cooler to maximum flow with a 2" diameter supply 

duct.  This was at about 80% power at 3000 msl and 40F OAT.  Pretty good 

for such a small cooler.  But the real benefit is the ability to 

regulate the oil temperature for operation in a more ideal range.  

Larger coolers which are commonly used probably result in more like 30F 

reduction.



Also, there was some discussion recently about how to route a manifold 

pressure line.  I did it very simply with a connector from the #3 

cylinder and hose through a snap in bushing in the rear baffle to a 

bulkhead fitting on the firewall.  This may not work as well with the 

normal baffling.



Cliff

- The Matronics TeamGrumman-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?TeamGrumman-List

P1060659.JPG

Description:

Filesize:

841.33 KB

Viewed:

868 Time(s)

P1060660.JPG

Description:

Filesize:

846.52 KB

Viewed:

868 Time(s)

P1060664.JPG

Description:

Filesize:

855.91 KB

Viewed:

868 Time(s)

teamgrumman(at)yahoo.com
Guest

Posted: Tue Nov 08, 2011 11:04 am Post subject: Oil Temperature Control

Bill Kelly has the same experience with his O320-AA1C.  He has some sort of manual controled valve.

From: flyv35b <flyv35b(at)minetfiber.com>

To: "teamgrumman-list(at)matronics.com" <teamgrumman-list(at)matronics.com>

Sent: Tuesday, November 8, 2011 6:41 AM

Subject: Oil Temperature Control

 I hate to change the subject about oil level but I recently made and installed a valve that will control the air flow to the inlet of the oil cooler on my O-320 powered Lynx.  When I installed this engine several years ago I wondered if the small stock AA-1C cooler would be adequate but decided to use it until testing proved otherwise.  It has worked well even at high ambient temperatures during extended climbs.  But my cooling with this engine is actually better than needed and during the cool weather here in the NW the oil temperature will not get up even close to 175F where there is half a chance of evaporating the moisture.  I got tired of taping over the inlet to block part of the air flow so I fabricated a cockpit adjustable air valve to regulate the flow and therefore the oil temperature.  It's operated by a simple push-pull cable with a ratchet lock, much like th stock mixture cable.  A test flight a couple of days  ago showed a 20F temperature reduction from no air flow through the cooler to maximum flow with a 2" diameter supply duct.  This was at about 80% power at 3000 msl and 40F OAT.  Pretty good for such a small cooler.  But the real benefit is the ability to regulate the oil temperature for operation in a more ideal range.  Larger coolers which are commonly used probably result in more like 30F reduction.

Also, there was some discussion recently about how to route a manifold pressure line.  I did it very simply with a connector from the #3 cylinder and hose through a snap in bushing in the rear baffle to a bulkhead fitting on the firewall.  This may not work as well with the normal baffling.

Cliff

 [quote][b]

- The Matronics TeamGrumman-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?TeamGrumman-List

Display posts from previous:

	Matronics Email Lists Forum Index -> TeamGrumman-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum