Sunset Flight

This is Skywalker Flight #74, flown on Sept. 7, 2017.  It ended up being a 38.5 minute flight–scheduled to land right at sunset.  The purpose of the flight was to carry insect traps at 300′ AGL and collect samples of what might be flying up at that altitude.

What I like about this flight is that the stable sunset air leads to very consistent autopilot performance.  The circle hold is near perfect.  The altitude hold is +/- 2 meters (usually much better), despite continually varying bank angles which are required to hold a perfect circle shape in 10 kt winds.…
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Field Comparison of MPU6000 vs VN100T

The U of MN UAV Lab has flown a variety of sensors in aircraft, ranging from the lowly MPU-6000 (such as is found on an atmel based APM2 board) all the way up to an expensive temperature calibrated VectorNAV VN-100T.  I wish to present a quick field comparison of these two sensors.

[disclaimers: there are many dimensions to any comparison, there are many individual use cases, the vn100 has many features not found on a cheap MPU-6000, the conditions of this test are not perfectly comparable: two different aircraft flown on two different days.   These tests are performed with a …
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