Paul wrote:

I might point out that this is kind of academic as a computerized fuel injection
system like Tracy's knows exactly how much fuel is actually being injected. Tracy's
entire EFI system cost little more than most flow meter based measuring systems.

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

Given the number of cars out there I would say it is almost unheard of.

Paul Lamar

The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org