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Rob_Lefebvre
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  • Ontario
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Rob_Lefebvre's Groups

Rob_Lefebvre's Discussions

Helicopter Vibration Levels

Started this discussion. Last reply by Rob_Lefebvre Oct 6, 2014. 59 Replies

I just wanted to make a post to specifically address the issue of vibrations on helicopters, as I am seeing quite a few logs which exhibit excessive vibrations. This not only affects Loiter, but can…Continue

Warning about Helicopter Power Supply!

Started this discussion. Last reply by Stuart Brookes Jan 21. 30 Replies

I've posted about this before, but I feel I must reinforce this:You MUST use a completely independent power supply for your APM or Pixhawk than you use for the Servos.  DO NOT use one BEC to supply…Continue

Arducopter 3.2 Warning

Started this discussion. Last reply by Rob_Lefebvre Jun 5, 2014. 4 Replies

Just wanted to put out a warning to everybody, that you should not be testing any of the 3.2 Release Candidates for Tradheli until I say so.At this time, I have not flight tested 3.2rc1 or rc2. I…Continue

Who wants to alpha test Flybarred Acro code?

Started this discussion. Last reply by Rob_Lefebvre May 27, 2014. 79 Replies

I am attempting to fix the flybar acro code, wanted to get it out with the upcoming 3.1.3 release, but I'm in a bit of a pickle.  It compiles in Arduino, but won't compile in Make for PX4.  I assume…Continue

 

Rob_Lefebvre's Page

Latest Activity


Developer
Rob_Lefebvre commented on Emlid's blog post Navio+ and Odroid-C1: the most powerful Linux autopilot
"I'd like to see one for the Odroid XU3.  :) "
yesterday

Developer
Rob_Lefebvre commented on Chris Anderson's blog post IEEE Spectrum: drones no more dangerous to planes than small/med birds (and that's not very dangerous)
"Michael, I am hardly a fearless (or careless) drone pilot, and care deeply about this.  As a motorcycle rider, I know how it feels when others drive without care. However, as I said, the risk lies somewhere between what manned aviators fear…"
yesterday

Developer
Rob_Lefebvre commented on Chris Anderson's blog post IEEE Spectrum: drones no more dangerous to planes than small/med birds (and that's not very dangerous)
"Agree 100% Guy! I think the truth about the risk posed by drones lies somewhere between here, and there.  More dangerous than birds, pound for pound, but less dangerous than all the other things going on in manned aviation already.   We…"
yesterday

Developer
Rob_Lefebvre commented on Chris Anderson's blog post IEEE Spectrum: drones no more dangerous to planes than small/med birds (and that's not very dangerous)
"Michael, please read the thread before linking it.  You just perpetuated the myth about bird strike damage.  I guess this one has been circulating for a while already.  Just the 3rd post down corrects the facts.  The damage to…"
yesterday

Developer
Rob_Lefebvre replied to Gregory Harrington's discussion GeoFence Altitude Behavior has changed ?!?!? When did it change?
"Gregory, this feature was not removed on purpose, it would be more accurate to say that it was not added back in when most of the code affecting Alt Hold and Loiter was re-written for 3.2.  It just got missed. As Randy stated, it is now fixed…"
yesterday
bergen stephen replied to Rob_Lefebvre's discussion Fixing Yaw (particularly for Tricopters)
"Thanks for the quick reply and thread....I will follow the thread and let u know if the problem is solved."
yesterday
turdsurfer replied to Rob_Lefebvre's discussion Fixing Yaw (particularly for Tricopters)
"@Rob I only found this thread now that it was revived. Issues 2 and 3 are still real issues for me, even with the latest firmware. I had to lower Stab_yaw_P to some ridiculously low value to stop the oscillations. My tricopter is at my vacation…"
yesterday
turdsurfer replied to Rob_Lefebvre's discussion Fixing Yaw (particularly for Tricopters)
"Have you tried arming? I don't have my tricopter with me now, but I think the yaw servo only works after arming it.B.t.w. here's a nice thread on setting up APM for a tricopter: http://www.rcgroups.com/forums/showthread.php?t=1792924"
yesterday
bergen stephen replied to Rob_Lefebvre's discussion Fixing Yaw (particularly for Tricopters)
"Hi, I am new to this field and I am completely stuck at this yaw issue. I am using an APM 2.6 for my tricopter. All motors are functioning properly. My servo is not at all responding wen connected to output pin 7, but when connected to channel 4 of…"
yesterday
benbojangles commented on Rob_Lefebvre's blog post Oh Look. Yet another quadcopter goes over $1M on Kickstarter.
" The videos I linked to remind me of Victor Lustig and this But I could be wrong "
Friday

Developer
Rob_Lefebvre replied to Anna Tian's discussion Best open source autopilots v.s. commercial autopilots for conventional fixed wing unmanned aircraft usage
"Would you mind detailing your Skyhunter system here?  I've got one that I need to start building soon.  Haven't chosen motor, servos, etc. yet. Also wouldn't mind details on the FX-61 and 79 as well.  Just want to see…"
Thursday

Developer
Rob_Lefebvre replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"Flight Mode 8 is the old Position mode, which was like Loiter, but with manual throttle.  It is not longer valid since 3.2.  The new Position Hold flight mode is #16.  As posted in your thread there, you should update MP to see the…"
Thursday

Developer
Rob_Lefebvre replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"Hi Craig, I believe your crash was due to a motor or propeller failure.  Very shortly before the loss of control, the vibrations suddenly increased significantly, then the motor output became noisy (ie: controller either responding to the…"
Thursday

Developer
Rob_Lefebvre commented on Todd Urban's blog post Can Your Frame Do This
"I have a 1kg Octocopter frame that can support 180lbs in the same test. :)"
Thursday

Developer
Rob_Lefebvre commented on Gary Mortimer's blog post DJI to release mandatory firmware update
"I agree.  I don't see this as a bad thing at all.  In fact, I think we should be doing it.  Be responsible voluntarily before something worse is forced on us."
Thursday
Quadzimodo commented on Rob_Lefebvre's blog post Oh Look. Yet another quadcopter goes over $1M on Kickstarter.
"Rob - My mistake. Looking at that HDMI cable video I am reminded of the decade or so I spent writing about home av, consumer electronics and in car entertainment.  I used to ask people whether they believed that the 0's were any…"
Thursday

Profile Information

About Me:
Mechanical Engineer
Arducopter TradHeli Lead Developer
Please tell us a bit about your UAV interest
Aerial Photography
Light Industrial Applications
Traditional Helicopters
Hometown:
Brighton Ontario Canada

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Rob_Lefebvre's Blog

Oh Look. Yet another quadcopter goes over $1M on Kickstarter.

Posted on January 6, 2015 at 2:39pm 43 Comments

I don't really even know what to say anymore. It has 4 motors.  And a camera. And wifi control. This one has a flash light source though, so that's new.  …

Continue

Ardupilot.com Forums Temporarily Down

Posted on December 19, 2014 at 12:30pm 15 Comments

This is just a quick note to say that the Ardupilot.com/forum/ was down temporarily due to server issues.  

New Transport Canada UAV Regulations Arrive!

Posted on November 27, 2014 at 7:46pm 41 Comments

Well, the moment we have all been waiting for in Canada is finally here.  Transport Canada has published the new UAV regulations.  It is important to understand that these regulations effectively come in 2 parts.  Basically, you have one set of regulations for UAV's less…

Continue

Small Electric Helicopter 108km/h Auto Flight

Posted on September 22, 2014 at 4:13pm 30 Comments

Another recent accomplishment with the Helicopter version of Arducopter was this full auto speed run which achieved a top speed of 30 m/s or 108 km/h.  This was done using 3.2 which features improvements to the helicopter flight dynamics code, as well as Spline Waypoints which is a general…

Continue

Comment Wall (11 comments)

At 5:59pm on November 30, 2011,
Developer
Jason Short
said…

Chris is the Admin. He can help you.

Jason

At 8:22pm on May 16, 2012, Carl La France said…

Robert thanks for your input the 1/8 aluminum on  on the fuselage will be a milled out channel running  half way down the side of the plane    to attach the wing the horizontal stabilizer and the vertical fin to a Exoskeleton about 1 1/2 pounds the rest of the plane is foam and fiber glass there was no distortion welding we had it clamped down  pretty good Thanks again Carl

At 4:26am on July 26, 2012, OG said…

Thanks for you assistance with my ecommerce sight yesterday . I appreciate it so much I give you my cost your first porches.

At 6:17pm on November 27, 2012, Dwgsparky said…

Hi Robert, sorry I missed your request. still getting used. to this system.

Sorry, not waterslides,,,, Kiddie trains from Granby.

At 7:53pm on January 24, 2013, Joshua Johnson said…

My bad I was just trying to give new members someone they can ask questions to because the site is super confusing at first for a while when your new. Ill stop doing it!

At 11:47pm on April 23, 2013, Manuel Zangenfeind said…

Dear Mr. Lefebvre,

I saw some videos from your heli in Loiter Mode and thought wow this heli is standing rigid in the air.

I'm using a TREX 700E and want to fly this heli with apm 2.5 version 2.91 autonomously.

Currently I want to adjust the PID parameter. The stabilize and the Altitude Hold Mode is working perfect, but I have some problems with the Loiter values.

So would it be possible to send me your PID values of the loiter mode? I think they have to be very similar.

Thanks.

Nice Greets from Austria

Manuel

At 2:56pm on July 8, 2013, Jonathan Weisburst said…

Hi Mr. Lefebvre, 

Thanks for getting back to me.  Do you have any suggestions in terms of renting or hiring aerial videography crews or drones?  

All the Best, 
Jon

At 11:06pm on June 3, 2014, Matt said…

Hi Rob,

Interested in making a Tandem out of 2x 800 sized helicopter. Just interested to discuss your thoughts.

At 7:34pm on July 12, 2014, Eric said…

Hi Rob, I saw your DroneCon talk on youtube (which was great, thanks!), and it looks like you got cut off towards the end there. By any chance is the full slide deck available somewhere? Or was there much more left? Thanks!

At 3:02am on August 1, 2014, Artem said…
Hi Rob, i know you had a lot to do with AC yaw control, could you confirm if motor values are used in the formula for the yaw servo control? In other words if running a motor in a wrong direction would affect the yaw control. If so is this something that appeared in the code since 3.1.3 or was it there before? Thank you!

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