About

Gender

Male


Location

Union Grove, AL


About Me:

DOD Engineer


Please tell us a bit about your UAV interest

Long range endurance missions.


Hometown:

Union Grove, AL


Activity Feed

Patrick B Lawler commented on Bart Theys's blog post VertiKUL 2: our second generation of transitioning VTOL UAV for automated aerial transport
"humm, any thoughts of rotating wings using a gyro to maintain wing attitude rather than rotating rotors? "
Oct 19, 2015
Patrick B Lawler posted a discussion
How do you guys recommend setting up the radio failsafe?  If Channel 8 goes low won't the motor shut down?  The pixhawk won't be able to control altitude with "throttle"/collective with no power.  Do you recommend setting the receiver to maintain…
Sep 24, 2015
Patrick B Lawler replied to Patrick B Lawler's discussion Yaw carouseling
"Will do, thanks!"
Sep 18, 2015
Patrick B Lawler replied to Patrick B Lawler's discussion Yaw carouseling
"Helloooooooooo!
Is anyone out there?????  LOL, HAHA

I have ordered a new 3dr pixhawk and gps/compass, hoping it arrives soon and will fix my yaw issues.  I am building the gasser on blind faith I will get it sorted out.  I'm hoping it was a…"
Sep 17, 2015
Patrick B Lawler commented on Rob_Lefebvre's blog post Arducopter Flies Gas Powered Helicopter
"I also have a helix conversion and will be setting it up with pixhawk and arducopter once I have my test bed (500 clone) working well.  I am in the process of laying out the helix side frames in CAD.  I am planning on extending the frames to accept…"
Sep 15, 2015
Patrick B Lawler replied to Patrick B Lawler's discussion Yaw carouseling
"Well I ordered a new Pixhawk and Gps/compass module from 3DR to rule out electronics.  This compass issue is very tiring.  Just to verifiy, with the Pixhawk mounted with 90deg roll and external compass 180 yaw, what should the settings for compass…"
Sep 14, 2015
Patrick B Lawler posted a discussion
I have stabilize and ALT_Hold tuned well, but when I go to position hold or loiter the heli stays in the vertical and horizontal very stable but yaws slowly without ever stopping.  In stabilize/ALT_Hold it  often drifts in the yaw also.  It does not…
Sep 10, 2015
Patrick B Lawler replied to Patrick B Lawler's discussion AltHold Mode ossilating/jerking
"I tested with EKF enable and got the same results.  I then as a last ditch effort reduced the two throttle P gain settings to almost zero, was warned the values were below the minimum limit. The oscilations went away but the heli sank in altitude. …"
Sep 2, 2015
Patrick B Lawler replied to Patrick B Lawler's discussion AltHold Mode ossilating/jerking
Sep 2, 2015
Patrick B Lawler replied to Patrick B Lawler's discussion AltHold Mode ossilating/jerking
"Conducted more testing, increased collective mid, throttle mid, reduced throttle accels, etc... nothing stopped the oscillations while in althold.  This is really discouraging.  Started thinking it is the pixhawk location causing prop wash to alter…"
Sep 1, 2015
Patrick B Lawler replied to Patrick B Lawler's discussion AltHold Mode ossilating/jerking
"Well, I went out and ran some test flights.  I could not find an Accel_Z_P but did find Pilot_Accel_Z and WayNav_Accel_Z.  Setting limits were 50-300 or close there about.  I ended up setting those as well as the throttle accels all to minimum…"
Sep 1, 2015
Patrick B Lawler replied to Urkadurka's discussion Bug on RC controls, could be ? Please look at the log !
"Mode 2 transmitter?  When you move the yaw are you sure you are not moving the stick vertically by a small amount?  It is quiet easy to inadvertently move the collective a small amount while moving the stick left or right for a yaw command.  Only…"
Sep 1, 2015
Patrick B Lawler replied to Patrick B Lawler's discussion AltHold Mode ossilating/jerking
"Thanks for the info, I'll give that a go and let you know how it turns out."
Sep 1, 2015
Patrick B Lawler posted discussions
Aug 31, 2015
Patrick B Lawler replied to Patrick B Lawler's discussion Confused on ACRO in ArduCopter (traditional heli) user group
"Awesome! that's what I was hoping for! I will now be buying an pixhawk and getting it dialed in. 


Thanks!"
Aug 4, 2015
Patrick B Lawler posted a discussion in ArduCopter (traditional heli) user group
There seems to be some conflicting info in the documentation.The link below says ACRO is frame reference, but the next link says earth reference.  The first link makes no distinction for traditional helicopters.  Has the firmware been updated and…
Aug 4, 2015
More…