<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
>>
Ed, congratulations on your first flight and sorry to hear about the
difficulties you are having.

Here are my thoughts on the problems.

The prop speed problem is definitely related to the low flow from the
governor. In a Lycoming, the prop oil passes through a slip ring area in the
front main bearing. There is no seal, so oil is free to flow along the
bearing. The governor has it's own gear pump that boosts the engine oil
pressure to 200-300 PSI. If the pump isn't flowing enough then it can't make
enough pressure (due to the leakage flow across the bearing) to actuate the
propeller. MT propellers typically require higher pressures than Hartzel or
McCauley to actuate. This is particularly true when everything is new and
stiff.

Do not fly the airplane until you have installed a governor that has
adequate flow!!! When the oil gets hot you may loose control of the
propeller.

I have a spare 2700 RPM governor for my plane (Lycoming 540) that I could
lend you if you are in a bind.

On the topic of the fuel control unit, have you checked to be sure there
isn't an air leak between the servo  body and the intakes? Perhaps an open
manifold pressure port on one of the heads or a missing gasket? An air leak
would cause the fuel servo to "think" less air is flowing into the engine
than actually is, causing the mixture to be excessively lean at idle. This
would also explain why everything seems to be fine at high (flight) power
settings.

Good luck!

Regards
Brent Regan



>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair

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