Have you looked at the EC2 MAP table up at the high end using the
EM2? Make sure that there are no holes in the table up at that
point. I would suggest putting the EM2 in map display and invoke Track
Mode so that the display follows where the engine is actually
running.
----- Original Message -----
Sent: Friday, December 02, 2005 5:16
PM
Subject: [FlyRotary] Turbo Surge?
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