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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

Rob_Lefebvre commented on David Barclay's blog post Vulcan UAV Frames from CreativeFlyers
"@ausdroid: I think it's mostly done for visual distinction, for marketing purposes.  I haven't seen any really sound engineering reasons why it just has to be done in the most complicated way.There are many ways to get 360deg video…"
15 hours ago

Rob_Lefebvre commented on David Barclay's blog post Vulcan UAV Frames from CreativeFlyers
"I really do not understand the point of these Z-arms at all.  Why not use one of two different methods, which do not require you to have arms tubes with cuts and braces in them. 1) Use arms with a base that angles them up.  You can even…"

Rob_Lefebvre replied to Hector Brown's discussion Ripping off drone/maker community
"Not that much different than Photo contests, and many other things like that.  Entrants sign away the rights to their IP in the hopes of winning a contest."

Rob_Lefebvre replied to turdsurfer's discussion Why no physically separate multicopter controllers and autopilots yet?
"I think the Arducopter developers would rather spend their time making the Arducopter Acro mode better, rather than working towards handing that control over to these other boards."

Rob_Lefebvre commented on Bertrand Duchiron's blog post Lynxmotion Quadrino Flight Controller (ex Flyingeinstein)
"That's another good question.  My guess would be because they want to use existing open source software that was designed for Atmega."
Peter Newhook commented on Rob_Lefebvre's blog post New Transport Canada UAV Regulations Arrive!
"Thanks George.  And good catch on the By-law. For any other Torontonians looking at this, the by-laws may be found at and the pertinant law is  "
George Kelly commented on Rob_Lefebvre's blog post New Transport Canada UAV Regulations Arrive!
"Peter The 9 km applies to non-recreational, aka 'commercial', flying. My own club field (Markham) is only about 3 km from Markham airport. But I'm pretty sure Toronto city bylaws forbid any RC flying in parks (most cities do). You…"
Peter Newhook commented on Rob_Lefebvre's blog post New Transport Canada UAV Regulations Arrive!
"I live downtown Toronto. The island airport means all of downtown, including the parks and Island, is easily within 9km of an airport. Does this mean I can't recreationally fly my mini-quad on a soccer field or in a park?  It's a…"

Rob_Lefebvre commented on Bertrand Duchiron's blog post Lynxmotion Quadrino Flight Controller (ex Flyingeinstein)
"I wonder how many control boards the market can support?"

Rob_Lefebvre commented on DAS Lab's blog post SWIFT Propolsion unit 1st test
"Very nice design!  Love it, as a disciple of Colin Chapman.  Every component should have two functions."

Rob_Lefebvre commented on Greg Dronsky's blog post FPV Gimbal For Zoom Camera - First Week of Tests
Feb 26

Rob_Lefebvre commented on Greg Dronsky's blog post FPV Gimbal For Zoom Camera - First Week of Tests
"Very nice!"
Feb 26

Rob_Lefebvre commented on Gary Mortimer's blog post UAV Challenge Medical Express 2016
"Yeah, the physical aspects of this seem pretty trivial to me.  So, 20 km round trip.  With a helicopter, that is a 24 minute round trip flight time.  Fairly trivial for an electric helicopter at an easy 50 km/h.  17 minutes at a…"
Feb 23

Rob_Lefebvre commented on Chris Anderson's blog post No drones at this year's Sparkfun AVC :-(
"Andrew, I think Sparkfun is quite far from being a "key player in the field".  I'm not sure it' really on the field at all? "
Feb 21
William Wegenast commented on Rob_Lefebvre's blog post Arducopter Flies Gas Powered Helicopter
"Hi guys, I love this build. @Rob; sorry to hear about the crash. Quick question to anyone; Should one use a Governor with the PixHawk when it's running a gas engine?, Or can the throttle servo be plugged into the PixHawk directly?"
Feb 20
Gary McCray commented on Rob_Lefebvre's blog post Iris/Pixhawk Cold Weather Testing
"That's a really good point David, the large majority of damping mediums we currently use would be severely compromised (probably downright useless) at -30 degrees C. The only thing I can think of that would work at all might be silicone and…"
Feb 20

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
Brighton Ontario Canada

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Rob_Lefebvre's Blog

CBC Documentary: The Age of the Drone

Posted on February 18, 2015 at 8:13pm 3 Comments

On February 19th at 9PM, the Canadian Broadcast Corporation will air a new documentary on drones, following up the one they did last year called Remote Controlled War.  Last year's was more focused on the military aspects, this new one is more commercial/recreational.

I'm not sure what the availability will be for those outside Canada.  Hopefully our…


Iris/Pixhawk Cold Weather Testing

Posted on February 18, 2015 at 5:00pm 27 Comments

Last weekend I drove up north a bit for some real cold weather testing of my Iris+ equiped with Pixhawk.  I had to get up early in the morning to catch -30C temperatures which is about as cold as I'm interested in testing.  At -30C, my gloved fingers froze after a few minutes.  Not quite frostbite, but deep into pain territory.



Canada to Regulate Recreational Flights Like Commercial

Posted on February 11, 2015 at 1:30pm 7 Comments

I'm not sure if anybody who is not a member of Unmanned Systems Canada can see this report or not:

So I will summarize:  At a meeting of the International Civil Aviation Organization in Montreal last week,…


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.  …


Comment Wall (11 comments)

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

Chris is the Admin. He can help you.


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.


Nice Greets from Austria


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, 

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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