Airspeed being reported as 1.3mph when at rest

ArduPlane Plane 4.6
1

Using an SDP3x sensor that has been calibrated with an ARSPD_RATIO of 2.074602. Was pulled from a working drone as well. I’ve checked for blockages and couldn’t find any. Blowing into it shows an airspeed increase.

Problem: Upon bootup I am seeing 1.3mph where previously it would report 0 mph. Ground speed is also stuck at 1.3mph which I’ve not seen before. These values persist with or without GPS fix.

Slick Bird v1.param (23.2 KB)

Anyone seen this before?? It’s making me really nervous.

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A .bin log file with LOG_DISARMED set to 1 would be more useful.

Some noise at rest is pretty normal for airspeed sensors.

1 Like
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Also show how you have mounted the sensor.