Mailing List flyrotary@lancaironline.net Message #55457
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: 20B Bog
Date: Mon, 27 Jun 2011 08:11:35 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Tim,
 
One more thing has occurred to me, you indicated you are using secondary injectors that are a bit larger than your primaries.  In that case, adjusting mode 3 adjusts the flow to both primary and secondary.  So IF you do manage to get the flow down enough on the secondary injectors using mode 3 so the larger secondary injectors are not injecting too much fuel (causing the engine to bog), you may find your primary injectors are now not injecting enough because mode 3 reduces/increases the flow to both.
 
So I would turn on only the primary injectors and run the engine and use Mode 3 to get the fuel flow right for the primary injectors (sounds like you may be ok there).  Then activate the secondary injectors and use Mode 6 to adjust the secondary differential - this mode will adjust the flow (on time) of the secondary injectors without affecting the flow to the primary injectors.  Might give it a try.
 
As Steve mentioned, you need to try and separate the two injector systems and try to pin point which one is causing the problem - right now it sounds like it’s the secondary system.
 
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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