REFLECTOR: Static port calibration

Al Gietzen ALVentures at cox.net
Wed Mar 4 09:40:28 CST 2009


Out playing in the sky yesterday, I decided to do checks on altitude and
speed readings.  I had never done the 'low pass over the runway' test.  150
KIAS, est 80 ft over the runway, altimeter readout on the GRT EFIS was maybe
100 ft too high.  Hum-m-m.  

 

Went out and flew the orthogonal square about the same speed; recording GPS
ground speed and IAS in each direction, then took the average of each.  The
speeds agreed within 1.2 knots.

 

I've always found my altitudes consistent with where ATC says I am - so I
don't think I need to change anything.

 

Al

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