Russell Kent wrote:

Yes, I had thought of that too, although I didn't mention it.  One thing

I wonder about

is "failed injector" operation.  I don't think Tracy's EFI can tell when

an injector

fails (unless it's *REALLY* smart about RPM vs injector dwell

comparisons).  You, the

pilot, can tell *something* is wrong because of the RPM drop.  A fuel

flow meter would

give you the information that the engine isn't consuming as much fuel as

the

EFI/throttle setting is telling it to consume, which at least gets you

to "fuel

delivery" as a cause.

Maybe it's pointless to worry about this.  Anybody have numbers on (or

experience with)

injector failure?

Other's have mentioned that Tracy's EFI has a "limp home" mode for

injector failure.  I

presume that this is pilot activated.  How does the pilot determine that

the injector is

failed if s/he doesn't have a fuel flow meter?  Or does the pilot just

try the "limp

home" setting, discover more power, and assume that the injector has

failed?

Russell Kent

Ed Anderson wrote:

 From personal experience, if you have an injector that fails... you will
know it very quickly.  Assuming it fails closed (far most likely failure
mode)  the engine will run rough (I don't mean a little rough, you will not
be able to ignore it), second the EGT on the rotor with the failed injector
will likely drop as it will lean past "best lean" and with less fuel in the
mixture, less temp in the exhaust.  Tracy may be able to add to the list of
likely indicators.

Ed Anderson

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