Subject: idle
From: ACRE NL
Date: 3/10/2002, 1:44 PM


So Chuck what you are saying is the rotary is flying again.
Are you flying it
to Sun & Fun? If you don't mind cruising at only 160 MPH with
a 182 we can go
in formation. We are stopping in Phoenix overnight on the way.

Paul Lamar


Yes I am still flying, trying to sort out idling problems. I am having
trouble keeping Tracy's ECU programmed to give a smooth transition from
power to idle. The ECU1 makes this transition at 16" MP. Below 16" only
the
primary injectors are fired, at double the "on" time. My engine behaves
erratically below 16" and it changes due to factors like uneven mixing
of
2stroke oil with avgas (all I can find) on cross-country trips, and
variable
(crankcase) oil consumption due to my overheated rotor [oil scraper] "O"
rings.

I got a new rotor housing from Mazdatrix so I will put the new engine
together with your TES orings soon I hope, probably will not install it
before Sun-n-fun. Yes I hope to make it there again this year and
looking
forward so seeing everyone there. A group flight might work if you can
stop
in Safford (SAD) My friend in his Apache twin will likely be going also.
160
MPH is about all I can do anyway!

BTW I wonder if I look like Jessie's racer on short final?

Chuck Dunlap


That is strange. Tracy's engine works perfectly.
Are you sure your injectors are in good shape. Sometimes they dribble
rather than spray.

Well I can call you from Phoenix and perhaps we can form up in flight at a
specific lat long. What is a good com chat frequency to use?
I assume everybody has a GPS. What day do you plan on leaving?

Paul Lamar


Chuck,

    I have found in my installation that around 15-16" Hg manifold and
approx 2800-3000 rpm that I need to program the system in much finer
increments of Manifold pressure and rpm than elsewhere.  If I do not,
everything is fine at idle and everything is fine higher than 3000 rpm but
as I increase from 2000 up through 3000 the air/fuel indicator will shift
from rich to an lean indication and the engine will stumble a moment.
Interestingly enough I don't notice it in the air.

Ed Anderson

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org