ION

[rr]

Your not going to believe this. . . I found a NACA report on the study
of lean AFR ratios and spark timing. That's not the best part.

They use an ION device to detect pre-ignition!

Yep, thyratrons, vacuum tubes, and all. Dated 1947. Here's the link:

http://wais-gw.larc.nasa.gov:81/naca.larc.nasa.gov:210/naca/HTML/1101/1=techreports.larc.nasa.gov%3A210;2=/usr/local/web/waissrc/naca;3=0%201101%20/usr/local/web/htdocs/naca/reports/1947/naca-report-886/naca-report-886.refer.html;4=techreports.larc.nasa.gov%3A210;5=/usr/local/web/waissrc/naca;6=0%201101%20/usr/local/web/htdocs/naca/reports/1947/naca-report-886/naca-report-886.refer.html;7=%00;

The link is long, so it might wrap when you view it.

BobR.


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