Marc Halcomb
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  • El Segundo, CA
  • United States

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fixed wing & quad UAV's
El Segundo

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Ranger EX 757-3 Auto Mode Test

Posted on April 21, 2017 at 4:38pm 0 Comments

Completed a successful "Auto Mode" test today using a simple rectangular circuit.  From the "CTUN" graph you can see the roll and pitch response matches the demand.  The aircraft flew stable and as expected, I also repeated this test using 2 different altitudes verifying throttle, airspeed, and rate of climb in "Auto Mode" as well.  Finally, everything is coming together for…


Ranger EX 757-3 (Auto Tune & Auto Trim)

Posted on April 8, 2017 at 1:00pm 4 Comments

I finally completed "AUTOTUNE" and "AUTOTRIM" activities on my Ranger, after fixing a self-induced configuration mistake.  Once "AUTOTUNE" was completed, FBWA mode flights were stable and responsive, ready to test an "AUTO" mode mission next.  Once "AUTOTRIM" was complete I ended up with a nice "MANUAL" mode trim and stable flying…


3rd Flight of Ranger EX 757-3

Posted on March 31, 2017 at 8:00am 1 Comment

Finally had the time for the next flight.  I increased the Roll and Pitch gain settings as the first two flights were quite sluggish to control inputs.  I was hoping to complete the "Manual" mode trim setup this flight but I continue to have too much starboard roll for the trim setting on the controller.  

  • The gain setting increases…

Maiden Flight of Ranger EX 757-3

Posted on February 10, 2017 at 8:30pm 15 Comments

I completed the maiden flight of my Ranger EX 757-3 today, with mixed results.  The flying weight today was 6lbs, using a standard rule of thumb, the power requirements would be 450 - 600W.  The supplied 3715/1000KV outrunner brushless motor only provides 300W.


  • Initial parameter selection flew the aircraft safely and successfully in Manual and FBWA! 
  • The build was good (no bits flew off)!
  • All the systems checked…

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