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Alex commented on Emlid's blog post Tuffwing integrates Reach RTK, gets 4cm precision without GCP
"Fantastic results. Thanks for the 100% transparent sharing!"
Nov 1, 2016
Alex commented on VGR-Systems's blog post Thrust vectoring coaxial Drone Update
"Impressive work!! Thanks for the generous sharing.

Two newbee questions:
1. How to change the heading of the camera (I think the CR motor keep constant zero yaw torque)?
2. Not possible to use PX4 to replace the openpilot FC?

Thanks!
Alex"
Aug 16, 2016
Alex commented on DroneRanger's blog post Post Flight Log File Web Application
"Cant wait to test it!"
Jan 4, 2016
Alex commented on Zubax Robotics's blog post Zubax GNSS positioning module - GPS/GLONASS + Compass + Barometer + CAN
"Interesting product, I will buy one for testing as well.

Can brothers who also bought and tested this unit provide any positive/negative feedback? Would be really appreciated to see it.

To ZR Team, wonderful work! One suggestion: if you can…"
Nov 18, 2014
Alex commented on Usman Qayyum's blog post PID position Controller for Arducopter with VICON Measurements!
"It would be really appreciated if you can share your code with me! Very interested on this implementation!"
Sep 7, 2013
Alex commented on Usman Qayyum's blog post PID position Controller for Arducopter with VICON Measurements!
"Awesome and congratulations!"
Sep 7, 2013
Alex commented on Ryan C Smith's blog post I know how I am spending this weekend
"Super cool. but is it supposed to be avaiable Feb 2012? So now if ordered from DIYD, I can also get my own in a couple of weeks?
 
Thanks"
Dec 18, 2011
Alex commented on Jean-Louis Naudin's blog post Full autonomous flights of the MAJA drone with ThermoPilot v5
"Awesome, man!!!
Truly awesome!!!!!!!!!!!!"
Oct 12, 2011
Alex commented on Chuck's blog post $4 million hummingbird
"Impressive flight performance, but...wait 4 MILLION to get it!?????"
Sep 18, 2011
Alex commented on Trent at MyGeekShow's blog post Stock Easy Star Endurance Test
"Very useful info, many thanks for sharing man!"
Sep 18, 2011
Alex commented on William Premerlani's blog post sustained rotations : pushing the envelope
"OMG, bill. Every work you have accomplished is so creative and legendary. As a big fan, I will implement the algorithm in my UAV platform (both 450 heli and easyglider fixed wing) soon and share the results with the whole team.
 
Thanks very much…"
Jun 19, 2011
Alex commented on William Premerlani's blog post A simple dead-reckoning algorithm
"Hi Bill,
Many thanks indeed for the update. It is really instrumental to me and mates here who are interested in your algorithm. I will let the whole team know the implementation result very soon.
 
Cheers,
Alex"
Jun 18, 2011
Alex left a comment for Alex
"Hi William,
Many thanks for your kind patience. If not bothering you too much, could you give me some suggestions on the following questions?

I accidentally find that I have two versions of “dead-reckoning.c”, which are both downloaded from the…"
Jun 13, 2011
Alex left a comment for Alex
"Hi William,
Many thanks for your kind comments. I am reading your post in detail right now. Will go to realize the code in this week and let you know my result then.
May trouble you a bit more in the implmenentation procedure if you don't mind.
 …"
Jun 12, 2011
Alex replied to Alex's discussion Inaccurate velocity measurement of UBlox GPS
"No one has ever encountered the similar problem before!?
 
Many thanks for sharing some experience!"
May 24, 2011
Alex posted a discussion
Hi All:    During my ground tests, I found that the velocity measurement (in North-East-Down format) of UBlox GPS is not accurate as I expected. The experiment is like this:    1. fix a UBlox GPS unit on a trolley, which is initially…
May 22, 2011
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