John A. Malley
  • Male
  • Bellevue, WA
  • United States

John A. Malley's Groups


John A. Malley's Page

Profile Information

About Me:
Owner and operator of aerospace consulting company in USA. Hands-on work in Boeing autopilot control laws and certification for B737 classics and B777.
Please tell us a bit about your UAV interest
Interested in UAV autopilot control laws, sensor integration, Flight Management control laws, as applied to UAVs, investigating new ideas for UAV control, data exchange between UAVs, UAV formation flying, etc.
Bellevue, Washington, outside Seattle

John A. Malley's Blog

Analysis of body axis yaw rate on quadcopter controllability in normal and single motor or prop failure case

Posted on February 9, 2014 at 9:30pm 8 Comments

The ETH video demonstrating a new algorithm to save a quadcopter after a single motor or prop failure didn’t reveal the algorithm. It did get me thinking about the quadcopter dynamics after a motor or prop failure.  My analysis starts with the model above, and the equations in “Quadrotor Dynamics and Control” by Randal W. Beard, Brigham Young…


The ultimate public UAS - a space telescope for everyone, accessed over the Internet

Posted on May 29, 2013 at 9:24am 3 Comments

Planetary Resources launched a Kickstarter project to fund a first-of-its-kind public "Hubble Space Telescope."…


ArduCopter Bridge Inspection - is it feasible?

Posted on May 27, 2013 at 12:27am 13 Comments

The Skagit River bridge collapse on Interstate 5 in Washington State, USA, got me thinking about using the Arducopter for large, inaccessible infrastructure inspections. I drove my family across this bridge many times so I took its unanticipated collapse harder than most who heard the news in far away places. Granted, metal fatigue or corrosion didn't directly lead to the collapse. Current data (witnesses and surveillance camera footage) point to repeated collisions between…


Foam Pad "launch pad" eliminated takeoff instabilities in Acrobatic and Stablizer Modes

Posted on September 10, 2012 at 11:30am 11 Comments


Summary: Takeoff from a foam pad on top of dry grass/lumpy lawn alleviated instabilities experienced when taking off from the dry grass/lumpy lawn.  No gain changes made to the 3DR ArduCopter code, using the "factory" settings for Stabilizer and Acrobatic…


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