lml@lancaironline.net Mailing List Archive

I had the same problem--I closed off the air from #4 cylinder and put in a naticu (sp) scope on the top of my cowling with a three inch duct to the oil cooler--I have never had an oil temperature problem since doith this.

Paul Hershorin

360

471LA

From: GT Phantom <gt_phantom@hotmail.com>
To: lml@lancaironline.net
Sent: Thursday, March 26, 2009 8:14:10 PM
Subject: [LML] Poor Slow-flight Cooling

Hi all,

I have a Lancair 320 (IO-320) which I am just starting to fly "for real" following 18 months of paint / renovations / panel upgrades since purchase.

During climb / cruise / descent all temps are as expected; however in slow flight oil temps rise rapidly even at moderate power settings. Never saw anything like this in my previous plane, a Lancair 235. In the pattern on a "nice" day, if the downwind is extended significantly while gear is down oil temps approach the red by the time I land.

Air supply for the oil cooler comes from the aft left side of the aft engine baffle (3" hose around an oval exit), with an additional air feed (1 1/2" hose) coming from a small NACA duct on the left side of the cowl. Oil cooler is mounted low on the left side of the firewall; air exits down into the low pressure area just above the air exit space by the exhaust pipe.

Is this a common problem on the 320? Is there a good fix?

Thanks,

Bill Reister
N351E

--

For archives and unsub http://mail.lancaironline.net:81/lists/lml/List.html