"Morgans" wrote in message
...

"Blueskies" wrote

"A friend flying an IO-360 powered Glasair installed an oxygen sensor
system that has an panel mounted indicator light to show when balanced
combustion is reached. He simply adjusts mixture until the light comes
on and knows he has complete combustion (his theory is that EGT is
really just a good guess). He has had very good results from this
system in terms of fuel economy and performance.

How does it deal with the lead fouling issue?

I had always thought that Oxy sensors were only used while the engine was
at low power settings, and that once it was cranked up to full power, the
engines ran in a closed loop system, ignoring the Oxy sensor. I would
think a mass airflow sensor, and a programmed controller to set the
mixture to the ideal settings would be more useful.

I would be interested in seeing how much the mixture was changed, with the
advice of the Oxy sensor setup.


Yes, lead would be a problem - the sensor won't last long with av-gas.

You can run closed loop at most loads (depending on the type of sensor, you
can run closed loop even when you want to run rich for power)

For the most common sensor, the output "switches" as you pass through the
chemically correct mixture of air and fuel - but you get best economy at air
fuel ratios leaner than that...

--
Geoff
The Sea Hawk at Wow Way d0t Com
remove spaces and make the obvious substitutions to reply by mail
When immigration is outlawed, only outlaws will immigrate.