Assisting with the annual inspection on my Bonanza (OK, mostly getting in the way), I was busy gapping and then cleaning the spark plugs when I began to wonder how this small electrode—that over its lifetime will spark perhaps millions of times, resulting in the burning of thousands of gallons of avgas—came about. The spark plug I was holding was made by Champion Aerospace, which makes more aviation spark plugs than any company and was the first to introduce a line of spark plugs manufactured especially for aviation. In the early days, automotive spark plugs were used.
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