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Message-ID: <45D86BC8.1030709@sbcglobal.net>
Date: Sun, 18 Feb 2007 10:07:52 -0500
From: John Slade <sladerj@sbcglobal.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Static RPM reading
References: <list-1845237@logan.com>
In-Reply-To: <list-1845237@logan.com>
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I've noticed something that might be a problem, or might be leading to 
one, and was wondering if anyone had any ideas on the cause....

During high power run-up my rpm reading on the EC2 sometimes "bounces 
around".  Rpm reading is always steady at 3500, and at 5500 or whatever 
in flight. Sometimes, when I increase throttle during runup it'll get to 
around 4500, then it'll start changing reading rapidly (2 or 3 times a 
second) between 4500 and somewhere above 5000. Other times it'll sit 
still at 5300 or so. I don't see any performance change. I know the rpm 
is powered from injector pulses. What could make the injector pulses 
bounce like that?

John Slade
Turbo rotary Cozy