The saga of the Insight Instrument Corporation began in the winter of 1980. Engineer John Youngquist was flying a Bonanza on a night flight when the airplane's engine began to run rough. It misfired and stumbled a few times while the existing panel instruments showed absolutely nothing out of sorts under the cowling.
With nothing factual to go on, Youngquist took a pure guess as to the length and breadth of his developing engine problems, then came up with a flight plan that matched his guesswork.
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