When I started logging telemetry data, I noticed that GPS was all over the place. Sometimes it seemed right and sometimes it was way off. GPS measures ground speed using only the horizontal plane so if you are diving straight down, GPS would read 0 even if you are going in at 100mph. Also, when inverted or at steep bank angles, readings were much lower than actual. Seems that GPS is only accurate straight and level.
I did a comparison video of GPS sensor vs an actual air speed sensor that uses a pitot tube. Check out the video.
Jose Soriano
I did a comparison video of GPS sensor vs an actual air speed sensor that uses a pitot tube. Check out the video.
Jose Soriano
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