Mailing List flyrotary@lancaironline.net Message #28083
From: Bartrim, Todd <Steve.Bartrim@canfor.com>
Subject: Turbo Surge?
Date: Fri, 2 Dec 2005 14:16:31 -0800
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
I think I experienced a small amount of turbo surge during my last flight. It was only evident when MAP was between ~ 0 & 0.5 psi boost. A small change in throttle position in either direction would eliminate it. It sounded & acted almost identical to the way that the engine would previously act when positioned precisely at the injector staging point. But my staging point is at ~ 18"Hg and I have that well tuned now so as not to cause a problem.
    So  my question is aimed at those with greater knowledge and experience in this area. What exactly does turbo surge feel like? What are the symptoms? Is it likely that what I was experiencing was just tuning related? I do have the TurboSmart electronic boost controller, but since I hadn't played with it since last year, I didn't want to make any adjustments without taking another look at the instruction book again, but I doubt that it was related.
 
Todd
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