wrote in
:

I think cats in planes can't really work with air-cooled engines.

Since they inherently require a really rich mixture, putting one in a
plane would not only decrease the already marginal engine performance,
but also fry a cat that had to burn off all the excess fuel during a
full-rich takeoff.

Let me make clear, I am NOT pushing for them... far from it. It's just a
way to potentially help with a "perceived" pollution problem.

Of course, as long as we run 100LL, it's a moot point. [The converter
would die a quick death.]

The O2 sensor tracks this pretty quickly and gives the computer quick
feedback on its mixture control so it can adjust on the fly. For an
airplane, the power is pretty much set it and forget it.

The original desire we had for an O2 sensor was with electronic ignition,
feedback to help adjust both the mixture and ignition timing on the
aircraft (in flight). Again, with 100LL being burned, the O2 sensor
wouldn't survive - so other methods had to be found.

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James M. Knox
TriSoft ph 512-385-0316
1109-A Shady Lane fax 512-366-4331
Austin, Tx 78721
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