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I’ve wanting to record some flight test data for awhile now, to help answer the question about whether the aircraft’s cruise performance has changed with the overhauled engine. But, I found that the EFIS data was not being recorded by the data recording script on my laptop. It took a few hours of troubleshooting, but I eventually ruled out EFIS configuration problems and wiring failures. Today I finally figured out that the problem was a a failed serial port on the four port Keyspan USA–49W Serial to USB Adapter. This morning I switched the EFIS to the port normally used for my Event Marker, and the data recording was working again.

After sorting out the data recording, I went flying to do several cruise performance test points. It’ll take a few hours to crunch the data to see what it tells me.

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