• Male
  • Mountainair, NM
  • United States

Earl's Friends

  • Emlid
  • Scott Ashcraft
  • Adam S.
  • Kevin Hester
  • Greg Clark
  • Adrián Nagy Hinst
  • belkacem guerbasse
  • Woehrle
  • Prahas David Nafissian
  • Sam
  • Stephen Zidek
  • Carl La France
  • Andreas M. Antonopoulos
  • Prasant
  • UAS_Pilot

Earl's Discussions

Pulsed Light Sonar

Started this discussion. Last reply by Earl Dec 2, 2014. 1 Reply

Quad to a Tri ??

Started this discussion. Last reply by Johnny Yu Apr 17, 2013. 1 Reply

Altitude on MP

Started this discussion. Last reply by Earl Jul 12, 2012. 2 Replies


Earl's Page

Profile Information

About Me:
Working on robots and uav's
retired software eng.
plenty of time on my hands
own uphi.net a small isp in new mexico
ham radio op - N8TV
Please tell us a bit about your UAV interest

Earl's Photos

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Earl's Blog

CAUTION ..I REALLY mean it !

Posted on August 15, 2013 at 11:30pm 60 Comments

3 years charging these lipo battries and no problem. 8-16-2013 my luck ran out. I was charging a 3 cell 2200 mah lipo while I worked at the computer.<br /
3 years charging these lipo battries and no problem. 8-16-2013 my luck ran out.

I was charging a 3 cell 2200 mah lipo while I worked at the computer.

It caught FIRE near me. Got it out the door just in time.

It burns HOT and long.
Could have burned the place down to the ground.



PX4 launch with tongue...

Posted on July 18, 2013 at 1:30pm 16 Comments

7/18/2013 8:45 Am MDT

Launch from Route 66 Casino near Albuquerque.

Almost took my tongue with it !

Highest altitude was 65000 ft.

Maximum speed 45 Mph

PX4IO with 430 Mhz telemetry worked GREAT. Used 20 element 440 beam on ground and 3 element on balloon. Saw telemetry all the way.

APM 2.0 worked good also. Only the top camera…


PX4 on High Altitude Balloon

Posted on July 11, 2013 at 1:30pm 8 Comments

On Thursday July 18,2013 we are going to launch…


Android Ground Station coming along.

Posted on January 26, 2013 at 11:30pm 14 Comments

Here is my APM2.5 at my apartment in Albuquerque NM. See the 3 waypoints and home position?

Thanks a bunch Kevin! http://www.diydrones.com/xn/detail/705844%3ATopic%3A1094076

My android tablet is a Pipo S2 at $122 from Banggood.com What a deal! There are some things you have to do to…


8-3-12 Balloon/Glider Flight

Posted on August 3, 2012 at 1:58pm 15 Comments

It flew ! For 50 feet off ground. Premature rope cut ! Dang....getting closer

Moment of ground release.

Next Friday...8-10-12...same time ...same place...another launch…


Comment Wall (11 comments)

At 8:32am on February 10, 2009, Viper UAV Project said…
Hi, yes joining our efforts would be the best, and all help is realy apriciated.
I am right now playing with the xbee 2.5 modules for the planed remote build, i want to make.since i only have a old 72mhz 4 ch remote for my combatwing,
i want to make my own remote like the guys from draganflyer.com i love the remote they have for the x6.

Best regards Oliver
At 5:44pm on June 10, 2009,
Mark Colwell
I have both Sf 6DF & Sf 5DF IMU boards (5DF needs minor repairs, I have 3rd gyro to convert to 6DF) want to adapt Bill Ps DCM algorithms to Arduino 368 but need help with C , I am a FileMaker Pro systems developer, with some scripting but not proficient in C, C+, but I seem understand Jordi's the code when I see it. I have 3 Ardupilots and want to control a T-Rex 600 or Centurry Swift 550, both have several hours flight time, The others are for a large 3M wing, and a 100" Big Birdi glider converted with a Twin 450 brushless motors, I live in Colorado Springs and work in Denver, so a trip to NM is doable. I also was a Test / Project engineer for B2 bomber at Edwards AFB
At 5:45pm on July 1, 2009,
Thomas J Coyle III

Since you have assembled and programmed an ArduStation, please comment on what I have found out below:

I was about ready to program the ArduStation through the FTDI connector, but I noticed on the schematic and through a continuity measurement that the third pin from the right on the ArduStation board FTDI connector is hooked to the +5v on the ArduStation board.

What is the intent of providing +5v on the FTDI connector if the FTDI connector is powered by the USB connection?

Is it safe to use either the Sparkfun 3.3v FTDI board or the Ardafruit FTDI cable with +5v on the ArduStation board FTDI power pin (3rd pin from the right)?

I assume that the ArduStation board is powered up using its own power supply during the programming?

I have both the Sparkfun 3.3v FTDI board and the Adafruit FTDI cable. I am very tempted to cut the Vcc pin off of the ArduStation FTDI header since it serves no purpose in relation to the operation of the FTDI board/cable.

Jordi has not responded to this problem yet.

At 2:06pm on July 11, 2009, Xander said…
Earl, did you ever have any luck getting the motionplus and nunchuck going over i2c at the same time? (without having it swap between initializing them)
At 7:21am on August 7, 2009, Danilo Marques Figueiredo said…
Hi Earl,

Thanks a lot for the help!!!

Best Regards
At 9:17am on February 25, 2010, Shahrukh Arif said…
Hi Earl,

I am a student at Georgia Tech working on hooking up the ardupilot to a eflight apprentice airframe. I have no experience whatsoever with rc planes or PID controllers at all. I saw on someone else's page that you wrote a comment about using the ardupilot with one of these airframes. I was wondering if you could assist me with setting the gains on the ardupilot.


Shahrukh Arif
At 6:49am on March 16, 2010, Guy Kemmerly said…

Did you get an answer to your July 11 post to Jordi about whether waypoints can be added to the ArduPilot while the airframe is in flight?

At 12:33pm on March 21, 2010, tshado said…
Hi Earl,
We started a discussion a few days ago on the Chat of Diydrones.
I sent you , as we didn't finish it, a Private Message with some questions on the choice of your Tx/Rx RC Radio set.
I apologize if i did it the wrong way.
Please let me know if you prefer that i open a discussion to continue on this subject.
Thanks for your help.
Best regards,
At 8:14pm on March 1, 2011, jcrubino said…
Were one of the guys working on a Parallax Prop based autopilot?
What has become of the project?
At 2:41am on November 20, 2011, Cronselaar said…

Hi Earl,

How far did you ever progress with using your 6DOF home Acc and gyrocombination? I read all your post on the ardiuno forum and rcgroups but could not tell if you got a working IMU on the ardupilot board.




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