100KM
DavidJames
  • Male
  • Huntington Beach, CA
  • United States
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DavidJames's Friends

  • iSkyMaster
  • Cristian Miuta
  • jaideep gour
  • Andre Schoonbee
  • RM Aviation
  • Tim V
  • Anthonie Michael Muller
  • Chad Frazer

DavidJames's Groups

 

DavidJames's Page

Latest Activity


100KM
DavidJames commented on wayne garris's group Techpod Users
"I am approaching 3 years on my first Techpod.  It is amazing how many hours of flight time you can build up on a Techpod.   Typically I get about 2.5 hours of flight time at 13 m/s airspeed using two 6600 mAhr 4s…"
Aug 20

100KM
DavidJames replied to Chad Frazer's discussion $100 Gift Card to whoever solves this: Airspeed Creep - Airspeed artificially increasing - Fixed Wing
"Chad,   Sorry to see the crash.    There is no small irony in the bin file.    The temperatures logged from both the airspeed sensor and the barometric sensor are both reasonable.    Airspeed…"
Oct 2, 2016

100KM
DavidJames replied to Chad Frazer's discussion $100 Gift Card to whoever solves this: Airspeed Creep - Airspeed artificially increasing - Fixed Wing
"I ran a pixhawk board on the desktop here and got raw temp readings of no more than 3800.  So up around 7000 does seem high.    You could try running the pixhawk off usb power too and see if you get similar readings. Perhaps one…"
Oct 2, 2016

100KM
DavidJames replied to Chad Frazer's discussion $100 Gift Card to whoever solves this: Airspeed Creep - Airspeed artificially increasing - Fixed Wing
"Looks like you are operating fairly hot.    Your rawtemp in your log is about 7000 counts.     I checked my Pixhawk raw temp in being logged and it is about 3800 in the shade.   I think the raw temp…"
Oct 1, 2016

100KM
DavidJames commented on Zubax Robotics's blog post PX4 Sapog - advanced open source ESC from the PX4 team
"Pavel, In looking through the code on Firmware on GitHub I am not finding a place where I can adjust the Field Oriented Control(FOC) for different motor parameters.    Can you point out where to these parameters are?"
Aug 21, 2016

100KM
DavidJames commented on Zubax Robotics's blog post PX4 Sapog - advanced open source ESC from the PX4 team
"I just noticed that these ESCs have a PPM input and can be configured to run off the standard PPM interface.    No health feedback unless the UAVCAN interface is used though. This ESC might be have an advantage for racing because it…"
Aug 20, 2016

100KM
DavidJames commented on Zubax Robotics's blog post PX4 Sapog - advanced open source ESC from the PX4 team
"This looks like and excellent ESC.    Field Orientation Control plus UAV CAN    I ordered a couple of them to see how they work, for fixed wing applications   Thanks for the post.   :-)"
Aug 20, 2016

100KM
DavidJames replied to Nicholas Matias's discussion Throttle reduce and eventual stall on auto mission
"Nicholas, There is a good section in the ArduPlane manual on tuning the TECS speed controller. http://ardupilot.org/plane/docs/tecs-total-energy-control-system-for-speed-height-tuning-guide.html I changed motors on a plane recently and the lower…"
May 14, 2016

100KM
DavidJames replied to muavdrones's discussion Current architecture of drone autopilots is wrong , Drone hardware architecture needs to be completely re-engineered.
"mauvdrones, I think a processor that can detect when it is in error is the best next step.    Software and control algorithms are not the weak link.  They are tested in development and even further in aircraft flight tests.  The…"
Apr 21, 2016

100KM
DavidJames replied to Nana Sumarna's discussion RFD telemetry 900+ can not connect.
"A solid read light means it is in boot mode ready for programming.   You might just have to load the latest firmware."
Apr 17, 2016

100KM
DavidJames replied to Nana Sumarna's discussion RFD telemetry 900+ can not connect.
"I checked an RFD900+ that was sitting on the bench here. Interface cable wire colors are in the same order as yours.     I get a solid green light followed by a blinking green light after plugging the interface cable into a USB…"
Apr 17, 2016

100KM
DavidJames replied to muavdrones's discussion Current architecture of drone autopilots is wrong , Drone hardware architecture needs to be completely re-engineered.
"mauvdrones, Some of the orginal Swiss pixhawk implementations were on the gumstix processors that have both an ARM and a fast DSP.    The DSP is good for the core control loops. Here is a link to the gumstix…"
Apr 6, 2016

100KM
DavidJames commented on Chris Anderson's blog post New project to create an Ada-based autopilot
"The other aspect of creating a high reliability is the hardware that it runs on.     The Hercules line of processors is designed for safety critical applications.   I think NutX has been ported to one of the processors…"
Apr 3, 2016

100KM
DavidJames commented on Chris Anderson's blog post Solar-powered launch system allows totally unattended operation
"IRIS+ is amazingly adaptable.   Shame 3DR is discontinuing it."
Feb 18, 2016

100KM
DavidJames commented on Andy Jensen's blog post Last-sell for many legacy 3DR product
"@Chris A.   I feel kind of foolish not calling 3DR more for tech support.   Kind of thought that doing it yourself was the point of the whole Do It Yourself Drone thing.   :-)   I find it very hard to believe that the…"
Jan 31, 2016

100KM
DavidJames replied to Aussie in AZ's discussion 3DR telemetry no longer supported by 3DR....options?
"Seppo,   Thanks for pointing out the rfd-900u radio modem.     That looks like an excellent radio modem.     The antenna cables are reasonably priced too.   They will provide a lot of…"
Jan 30, 2016

Profile Information

About Me:
Control System Engineer
Please tell us a bit about your UAV interest
UAV Planes
Hometown:
Huntington Beach, Ca.

DavidJames's Blog

+100km flight on a charge with a Techpod

Posted on November 14, 2015 at 4:00pm 20 Comments

The mission planner indicates that I got to 120km.    Seems reasonable, flying speed was about 14 m/sec for two hours and 25 minutes.  That is about 120km.

Here is the KML…

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The Snotbot, another drone for good!

Posted on July 30, 2015 at 11:14pm 2 Comments

Just when you thought it couldn't get any more interesting.      Along comes the Snotbot.    A whale research drone that is being developed by  Ocean Alliance and…

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