Mailing List flyrotary@lancaironline.net Message #52828
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Adjust BELOW Observe ABOVE
Date: Sat, 6 Nov 2010 12:51:48 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Bill, if you don't like the idea of using Mode 6 because it may cause an adjustment of all bins above staging - here is an alternative suggestion based on the way I coped with the situation.
 
As I mentioned my engine would also bog due to leaning during the staging process - being too lazy to read the manual and spot Mode 6 as a possible solution, I used the "brute force" method.  I observed that when my engine staged my bin pointer would jump from the 30 some region to around 60.  It was immediately after I observed the manifold pointer to make that jump - that the air/fuel ratio went lean and the engine bogged.
 
So from the lean indication I was getting , I presume my engine was (for whatever reason) not getting adequate fuel in the bins around 60.  So I started increasing the MAP values in bins 60-65  higher (enrichen) in incremental steps.  I found that each adjustment richer in those bins caused the bog to become less severe giving me a comfortable feeling I was headed in the correct direction.  Eventually the bog disappeared and my bin values above 65 were not affected because I did nothing to change those.
 
You might want to try that method - but I would give Mode 6 another try by adjusting below staging and checking results above staging.
 
Ed
 
Edward L. Anderson
Anderson Electronic Enterprises LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com
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