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From: "Hapgood, Matt" <matt.hapgood@funb.com>
To: "'lancair.list@olsusa.com'" <lancair.list@olsusa.com>
Subject: second flight of N366B
Date: Mon, 22 Jan 2001 11:42:40 -0500
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First Union Securities, Inc.


Mike Dehate came to Charlotte last weekend for the second test flight of my
360.  The first flight was terminated after the governor failed to keep the
propeller under 2700 RPM.  I had the governor overhauled - it had been set
to 3200 RPM, so it seemed to be the likely culprit.

Mike arrived on another cold weekend in NC - about 40 degrees, but the
hangar always seems to feel colder.  Saturday morning he took off, and...

When the oil temperatures got over about 215 degrees, the prop RPM began to
increase.  Mike landed the plane before an overspeed occurred.  

We hacked a new hole in the cowl and installed the "sharks gills" to try to
keep the oil temperature down, and he took off for another test.
Unfortunately, the RPM started to increase again with oil temps over about
215 degrees and Mike had to reduce power to avert another overspeed.

So... what's the problem?

1.  I know 225 degrees isn't a good oil temperature - but is it TOO hot to
allow the governor to control the prop?  My prop shop thinks so, but
Lycoming doesn't.

2.  Should I adjust the "static RPM" (course pitch adjustment) on the MT
-12B to 2400 RPM (currently set to 2600 RPM) to make it "easier" for the
governor?  Lancair's Orin indicated he typically sets up the MT prop and
governor so that static RPM is around this range and I have spoken with
another mechanic who said he has set them to 2200 RPM static...

3.  Do I have an internal engine problem (i.e. thrust bearing...)?


Any thoughts appreciated.

Matt
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Please send your photos and drawings to marvkaye@olsusa.com.
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