100KM
DavidJames
  • Male
  • Huntington Beach, CA
  • United States
Share

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 replied to Richard Morrissey's discussion Building a Drone for ecology work.
"Richard, Fixed wing drones do work well with winds.   They cruise at about 12 meters per second.  They can fly for more than an hour.   You get nice evenly timed photos with the survey pattern setup to fly across wind and always…"
yesterday

100KM
DavidJames replied to Richard Morrissey's discussion Building a Drone for ecology work.
"Event 38 has a fixed wing agricultural drone package.    It doesn't support the payload weights you are after but it would allow you to prototype the system operation.   I have found their fixed wing drones to be quite…"
Thursday

100KM
DavidJames commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"I managed to get a 3DR Solo with the Pixhawk 2 logging high data rate gyro data.    The GYR1 data is logged at 1000Hz.   It looks like the Pixhawk 2 has a low noise setup and gets full performance out of the…"
Jul 1

100KM
DavidJames commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"@Anthonie That is the plan.   I was going to compare the Pixhawk1 with the APM2.6. I may be able to compare the Pixhawk2 on the solo too.    I am actually expecting things to be better on the battery.  USB power is pretty…"
Jun 28

100KM
DavidJames commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"I logged some data from a Pixhawk 1 and found that the rate noise is close to the the 0.005 deg/sec/root(Hz), single sided level in MPU6000 spec.   A little higher than the spec., but I was bumping the desk at bit when I logged the data…"
Jun 27

100KM
DavidJames commented on Jack's blog post Quadcopter ESC: Type, Firmware and Key parameters
"Here is a link to a post that identified the worlds best ESC with a series of tests.  :-) http://diydrones.com/forum/topics/worlds-best-esc-making-it-better?commentId=705844%3AComment%3A2225116"
Jun 26

100KM
DavidJames commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"I just noticed that the Invensense ICM-20602 with its 0.004 deg/sec/root(Hz) is a single sided PSD measurement.   This means that the ICM-20602 gyro angle random walk(ARW) is actually better than I showed in my early posts: ICM-20602 …"
Jun 23

100KM
DavidJames commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"APM 2.8 with the MPU6000 (0.005 deg/sec/root(Hz), 0.3 deg/root(hr)) is at least 2 times better than any of the HG1120s Pixhawk 1 with its MPU6000 (0.005 deg/sec/root(Hz), 0.3 deg/root(hr)) is at least 2 times better than any of the HG1120s Pixhawk 3…"
Jun 20

100KM
DavidJames commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"Comparing them in terms of angle random walk, the Invensense ICM-20602  0.004 deg/sec/root(Hz) is equivalent to 0.24 deg/root(hr).   This is 2.5 times less rate noise than the best HG1120.  The ICM-20602 is an excellent…"
Jun 20

100KM
DavidJames commented on Chris Anderson's blog post Nvidia demos visual navigation on 3DR Iris+
"I have always liked the Iris.     Even though I have a Solo now, I think the Iris is a better work quadcopter than the Solo.    The Iris has both a primary rf control link and a secondary rf link for telemetry.  …"
Jun 13

100KM
DavidJames commented on Alex Frye's blog post Project Conclusion
"Looked like you were close to getting it flying.    Amazingly tough center section!    Put the wings back on.   It is worth another try. I find that having an autopilot in aircraft(even if it is just manual flight…"
Jun 8

100KM
DavidJames replied to Ahmed Desoky's discussion What is the best single board computer and autopilot for fixed wing UAV? Without cost limitation
"Here is a link to the companion computers developers page for ArduPilot: http://ardupilot.org/dev/docs/companion-computers.html"
May 20

100KM
DavidJames replied to Arunava Pal's discussion Pixhawk Versions
"For high stability you want the autopilot with the lower noise IMU gyros.    The Pixhawk 1 with the lower noise MPU6000 IMU gyros is a better autopilot for hexacopter stability.    The Pixhawk 1 uses the same processor…"
May 8

100KM
DavidJames commented on Chris Anderson's blog post More powerful Pixhawk 3 coming soon
"That ICM20602 looks great.   Both the ICM20600 and the ICM20602 have rate noise power spectral intensity of 0.004 deg/sec/root(Hz).   This is slightly less noise than the MPU6000's 0.005 deg/sec/root(Hz) and much less than…"
May 6

100KM
DavidJames replied to Arunava Pal's discussion Pixhawk Versions
"The Pixhawk2.1 is an well designed autopilot.    Not sure why the lower performance IMU was used.   Only one MPU9250 IMU is on the isolated IMU board.   The ICM20600 IMU could have been used and it is slightly…"
May 6

100KM
DavidJames replied to Arunava Pal's discussion Pixhawk Versions
"The Pixhawk1(2.4.x) uses the MPU6000 IMU, a redundant set of gyros(L3GD20 3-axis 16-bit gyroscope) and accelerometers(ST Micro LSM303D 3-axis 14-bit accelerometer / magnetometer).    The MPU6000 IMU gyro noise(0.005 deg/sec/root(Hz)…"
May 6

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…

Continue

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…

Continue

Comment Wall

  • No comments yet!

You need to be a member of DIY Drones to add comments!

Join DIY Drones

 
 
 

Groups

Season Two of the Trust Time Trial (T3) Contest 
A list of all T3 contests is here. The current round, the Vertical Horizontal one, is here

© 2017   Created by Chris Anderson.   Powered by

Badges  |  Report an Issue  |  Terms of Service