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Helicopter Vibration Levels

Started this discussion. Last reply by Rob_Lefebvre Oct 6. 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 Vlastimil Vrskovy Jul 2. 27 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. 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. 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 Team Tiltrotor's blog post Prototype Tiltrotor Development using APM 2.5
"Very interesting development. And a really fun read on the paper you produced, thanks.  I haven't watched the videos yet, but I am curious to see what your pitch stability is like in various wind conditions while hovering.  This is…"
3 hours ago

Rob_Lefebvre replied to Ferruccio Vicari's discussion Gasser APM2.6
"So your tail is turning 5500 rpm?  If so, that might be a little low.  I recently was trying to tune in my 600 video machine, which has a direct drive tail motor on independent speed control. This machine generally had a mushy tail.…"

Rob_Lefebvre replied to Ferruccio Vicari's discussion Gasser APM2.6
"ESC pulsing would DEFINITELY cause this problem.  It would be interesting if we could have motor Amp data, and see if there's an amperage oscillation which correlates with the tail oscillation. However, it can't just be that, as…"

Rob_Lefebvre replied to Marc Rechté's discussion ArduCopter versions - ATmega or ARM
"What do you mean by "four versions"? No question, you should get an ARM system (Pixhawk). The Atmel system is EOL, and will not be developed further.  There are also other advantages to using Pixhawk, you can log more data, use more…"

Rob_Lefebvre replied to Ferruccio Vicari's discussion Gasser APM2.6
"It's not possible for an actuator to be "too fast" for PID.  Maybe if we had some lag compensation, then it would, but we don't.   Do you have any Rate_Yaw_FF?"

Rob_Lefebvre commented on Andrew Tridgell's blog post APM:Plane 3.2.0 released
"This is the difference between programming computers/phones/etc and programming UAV's.  You can afford to be sloppy when the hardware doesn't get destroyed any time it locks up.  "

Rob_Lefebvre replied to Robert Merki's discussion Tell me what pains you about drones/UAVs. (VENT AT ME)
"Not quite, because the QX1 has a mini HDMI connector.  I actually have one of these devices for my Nex5.  It's OK.  I got lucky because mine works.  Many many people got non-working ones from various vendors.  Seems…"
Nov 20

Rob_Lefebvre replied to Robert Merki's discussion Tell me what pains you about drones/UAVs. (VENT AT ME)
"+2!   The Sony QX cameras are so close to perfect for us, but are missing just about every interface we need.  They don't have any wired video output.  Well, the QX1 has HDMI output, but that is not very useful.  Simple…"
Nov 20

Rob_Lefebvre commented on David Anders's blog post Woman snapped sunbaking by real estate drone
"Guys, I think the comments on her personal appearance uncalled for.  Let's talk about the subject of privacy, not her modelling credentials, I'm sure you're not beauty queens either."
Nov 17

Rob_Lefebvre commented on F. C. Bearsch "Tearig"'s blog post WaterJet cutting the first parts of the Pilot Viper
"Sorry Dan, yes I forgot.  My brain is saturated at this point. :)"
Nov 17

Rob_Lefebvre commented on David Anders's blog post Woman snapped sunbaking by real estate drone
"Oh no!  Somebody captured a CGA quality image of you!  Good heavens.  Hopefully none of your neighbours have a decent camera.  Considering their vantage point over your fence, they're more of a threat to your privacy.Lady,…"
Nov 17

Rob_Lefebvre commented on F. C. Bearsch "Tearig"'s blog post WaterJet cutting the first parts of the Pilot Viper
"Yeah, that's what my local waterjet place says, they don't want to do CF or G10 as it delaminates. So they make heads with a drill for the pierce?"
Nov 16

Rob_Lefebvre commented on F. C. Bearsch "Tearig"'s blog post WaterJet cutting the first parts of the Pilot Viper
"Waterjet cutting CF?  "
Nov 16

Rob_Lefebvre commented on Christiaan van Vollenstee's blog post DJI T600 Inspire - Hobbyking
"How much simpler would it have been to just have a simple, flat frame, and raise and lower the camera instead?"
Nov 14

Rob_Lefebvre commented on Paul's blog post DJI INSPIRE 1 in Action
"Juraj, I agree.  The SDK thing is a bit of a bombshell.  That will really shake things up.  It looks like it could fix what was DJI's biggest downside, which was that you could only use them for what they wanted you to use them…"
Nov 13

Rob_Lefebvre commented on Badman Teddy Edward's blog post New BeeWorks gimbal on kickstarter..
"Very nice looking gimbal design.  And I love the kinetic remote, that's an awesome idea!"
Nov 13

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

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…


Arducopter Flies Gas Powered Helicopter

Posted on September 20, 2014 at 11:20am 56 Comments

Now we're cooking with gas!

I have just completed a project to build a helicopter with a gasoline engine, controlled by Arducopter (of course!)  This helicopter serves as a test bed for future gas heli development work for a client of mine.  The goal was to prove out that it could be…


Helicopter Presents Attractive Alternative to Multi-rotors and Fixed-wing UAVs

Posted on February 3, 2014 at 1:10pm 335 Comments

I've been working on a new helicopter platform the last few months. Based on an MSH Protos heli which I chose because it's an extremely light weight platform, weighing in at only ~1200g without battery. It has a full belt drive which I much…


Merry Christmas and a Happy New ACRO!

Posted on December 24, 2013 at 7:01pm 16 Comments

3.1 was released just in time for the holidays, but I felt the new Acro Mode we have developed has not been adequately demonstrated.  So I shot this video to show that Arducopter now has a competent Acro mode to go along with all the other functions.  This is kind of a big deal to me, as I am interested in learning acrobatic flying, but I really appreciate having…


Comment Wall (10 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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