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Rob_Lefebvre
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Rob_Lefebvre's Discussions

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


Developer
Rob_Lefebvre replied to Randy's discussion ArduCopter-3.2 beta testing
"You should be able to hit your target yaw, softly, with enough I-term and I-max.   But the Accel Damping params should also help with that softness. "
yesterday

Developer
Rob_Lefebvre replied to Kristian's discussion Almost got killed in the office today. Log file attached..
"Nope.  If it goes into failsafe when it's disarmed, it does nothing. "
yesterday

Developer
Rob_Lefebvre replied to Kristian's discussion Almost got killed in the office today. Log file attached..
"The log is basically empty.  I could actually be the correct log.  From your description, you never armed, there is nothing to log, and the APM really had nothing to do with the accident."
yesterday

Developer
Rob_Lefebvre commented on Jonathan Meringer's blog post Scout Drone - Video Update
"Nice work guys.  Glad to see some helicopter love. Now all you need are some dangling arms on the bottom. :)"
Tuesday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"Tim, yes, I know it would seem like I shouldn't have baro problems, but I do.  I'm just replacing them, because I really don't have time or interest in troubleshooting this.  They are the only two units I have which have…"
Tuesday

Developer
Rob_Lefebvre commented on Mark Harrison's blog post Behind the scenes on the OK Go shoot
"Pretty cool video.  I'm curious how they started with the S1000 flying indoors, then moved outdoors, without any GPS problems.  "
Tuesday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"Tim, yes, I have baro problems, even with the baro covered. On both, I wedged some dark grey foam between the two boards, covering the baro. Then I used hot-glue to paint a "wall" on the outer surface of the foam.  Then used black…"
Monday

Developer
Rob_Lefebvre replied to Randy's discussion ArduCopter-3.2 beta testing
"Hi Ray, I had a look too. You should also try using some Rate_Yaw_FF, you have 0.001, which is very low.  I think I typically use something like 0.050.  More in that range anyway.  And I would think you should be able to get the…"
Monday

Developer
Rob_Lefebvre replied to F. C. Bearsch "Tearig"'s discussion AVC or active vehical control on rover in the group ArduRover User Group
"I've been wanting to work on this for a while.  I'm quite knowledgeable about this from full-scale cars."
Monday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"While it may seem unlikely, it's even more unlikely that you have found a bug which frequently causes a motor to stop, but only you or a handful of others are seeing it.  Think about this rationally. There are 10,000 people using it.…"
Saturday

Developer
Rob_Lefebvre commented on Dez Socks's blog post WARNING :FTDI Drivers Are Killing Fake Chips(windows update)
"Looks like this issue is resolving itself. http://hackaday.com/2014/10/24/ftdi-screws-up-backs-down/I personally didn't see a problem with the soft-bricking.  But now, it will just be required that the counterfeiters produce their own…"
Oct 24

Developer
Rob_Lefebvre commented on LHardy's blog post Flying an Unmanned Aircraft - Transport Canada
"LOL, yeah, I'm going through bureaucratic hell right now with Ministry of the Environment.  It's not fun. I am required by law to submit some documents.  But the documents are no longer available.  It seem the IT department…"
Oct 24

Developer
Rob_Lefebvre replied to Sean Whitney's discussion Tail Servo
"That is more than fast enough.  I don't think a 760uS servo will help at all. The problem could be the IMU filter rate.  Or your PID settings.  Or the fact that the algorithm isn't quite right.  I'll have to work…"
Oct 24

Developer
Rob_Lefebvre replied to Sean Whitney's discussion Tail Servo
"Any reasonably fast servo will work.  I'm currently using HK MIBL servos, and I have one of the 0.04 second ones on rudder.  But sticking with name brands, something like a Futaba S9352HV for example should be more than fine. IMO, a…"
Oct 24

Developer
Rob_Lefebvre commented on LHardy's blog post Flying an Unmanned Aircraft - Transport Canada
"So 602.45 is basically being used as a catch-all.  This is the "And other duties as required" of an employment contract. :) The problem is, it could be used very broadly.  "They could say "flying higher than 10 feet is…"
Oct 24

Developer
Rob_Lefebvre commented on LHardy's blog post Flying an Unmanned Aircraft - Transport Canada
"Emile, I wonder the exact same thing.  Would TC's regulations, and the SFOC process stand up to a court challenge?  Under what law or regulation is all of this based on? Chris, I notice that too.  I don't think we ever had…"
Oct 23

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

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…

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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…

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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…

Continue

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…

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Comment Wall (10 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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