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Hi Bernie
What is happening is that the ECU is switching between running only the
primary injectors below 16"MP and both sets of injectors above 16". Any
difference in the flow rates of the injectors can cause a lean condition
which usually can be covered up by running up the mixture a little when
operating in this area. Perhaps your injectors are not well matched?
I had this happen whenever I throttled back to descend when I had
Tracy's EC version 1. I have since changed to version 2 and have not had
the problem, with the version 2 you can program the switchover point
lower, try about 13". The version 1 was fixed at 16"
Yep I agree, flying up high feels like its in its own element, like it
will run forever its so smooth...
Chuck Dunlap
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of jbker@juno.com
Sent: Thursday, April 21, 2005 5:20 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Bernie building time 1.8 hours today
Tried to complete Van's AD for tipup 7's and 9's this AM, got frustrated
and went to fly after lunch. South Westbound holding my 50 mile radius
for River Ranch( my home field per the limitation) and 10.5k. Followed
the circle on around to Lakeland, then climbed to 11.5 eastbound just
north of R2901 then south between the build up that looked like they
went above 15k. When I ducked down between the clouds to get under,
actually got into a light shower (no harm to Ed's prop :>)). Seems like
the combination 9 and rotary just like it better the higher I go. Will
have to borrow and O2 bottle one of these days.
The only thing that made me uncomfortable today was that when I throttle
back to stay out of the red arc on the A/S to about 15 manifold pressue,
the engine goes into the unstable up and down hunting that no mixture
ratio seems to fix. Any ideas??
Bernie, 13+ hours now.
Homepage: http://www.flyrotary.com/
Archive: http://lancaironline.net/lists/flyrotary/List.html
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