I made my first flight in my Sonex B yesterday. Along with the MGL MX1 for airspeed, I have the MGL ASV1 as a backup, both piped correctly to the same pitot tube. They have a 10 - 15 mph difference between them, the MX1 reading higher than the ASV1. The altitudes are reading very close though. I thought I might have a small variation, not something this big. I'm not sure which is reading incorrectly, or if it's both. Any suggestions on what to look for or try?
Thanks,
Peter
Doylestown Pa
MX1 ASV1 Airspeed variation
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Re: MX1 ASV1 Airspeed variation
Easy way to test/calibrate your ASI, pitot and static system: http://www.rstengineering.com/rst/articles/KP89JUL.pdf
Re: MX1 ASV1 Airspeed variation
I recommend the 'Flight Data Viewer' and follow their method for airspeed calibration.
https://jasflyer.com/FAQ/AN3.aspx
https://jasflyer.com/FAQ/AN3.aspx
Re: MX1 ASV1 Airspeed variation
Interesting. I have a similar setup with a Blaze Alt/ASI/VSI as my backup which also provides baro data to an older Mode C txpdr via rs232. VSI variation between the two instruments is no more than 1knot. ALTITUDE is pretty close too. But VSI on the MX1 is quite variable and wrong.