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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 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…"
16 hours ago

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"Euan, these are great instructions, but I don't think this is the problem.  It is likely a motor/ESC issue, as nothing in the code, setup, or bug is going to make only 1 prop suddenly stop."
yesterday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"Mike, what steps have you taken to inspect the motor and ESC to make sure the problem isn't there?"
yesterday

Developer
Rob_Lefebvre commented on Phillip Jones's blog post Finally got to fly in restricted airspace!
"The vibration damping... well it's a custom solution, and is somewhat proprietary. Yeah, Bergen's continued use of mechanical mixing is...  let's just say I'm not a fan at all.  I would have thought it was possible to…"
yesterday

Developer
Rob_Lefebvre commented on Phillip Jones's blog post Finally got to fly in restricted airspace!
"Yes, I've even had the windmill problem with my little machines on the bench.  Though it's more of an annoyance. ;)  But I've actually through about a brake that can stop the rotor in the air.  If it's all gone…"
Wednesday

Developer
Rob_Lefebvre commented on Phillip Jones's blog post Finally got to fly in restricted airspace!
"Rotor brake?  Interesting, that's actually something I have thought about doing for safety. The 800 gasser at this point is a test bed to show that Pixhawk can control a gas heli, which I have done.  I do want to develop gas powered…"
Wednesday

Developer
Rob_Lefebvre commented on Sean Skirvin's blog post Meet the T1000, 1+hr flight times w/ 1kg payload
"Simplicity?  Yes, absolutely in favor of multirotors.  At least, for fixed pitch electric ones. Security?  Eh... I dunno.  Maybe in the smaller sizes.  Probably not in the larger sizes.  Lots of people having trouble…"
Wednesday

Developer
Rob_Lefebvre commented on Phillip Jones's blog post Finally got to fly in restricted airspace!
"Hi Phillip, great work.  Not just a technical achievement, but a legal one getting this done in the US. :)  Congrats.  So is that doing automatic target tracking? Quick question, IIRC, on the smaller version you brought to AVC in…"
Wednesday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"Mike, you're completely missing the point.  Nowhere, have I ever said that either the software, or the hardware is infallible.  This is where so many people seem to get it wrong. Just a month ago, I suffered a crash of a prototype…"
Tuesday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"Who's yelling? So, are your motors and ESC's higher or lower quality than your flight controllers? Because it seems to be following those around. Nobody is saying that clones are not allowed or wrong.  But I do personally think…"
Tuesday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"Shane, where are your logs?  I'll have a look. You made a comment about there not being any sanity checks on the baro.  I can't recall if there are in 3.1.5... maybe not, but there is in 3.2 for sure. "
Tuesday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"Ok, so just as I thought: http://www.rcgroups.com/forums/showpost.php?p=29717165&postcount=815 So you have chosen to purchase hardware form Witespy, a vendor who is known to have questionable quality, zero customer service, and does nothing to…"
Tuesday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"So you are suggesting that there is a bug in the software, which only affects certain hardware? Can you propose a hypothesis for that? The program outputs PWM signals.  How would it be possible that it outputs PWM signals in a way that most…"
Tuesday

Developer
Rob_Lefebvre replied to Shane's discussion Arducopter just not reliable.
"Mike, nobody is saying that the system is perfect, and there are never any problems.  But you are suggesting something that is highly unlikely, and not bringing any solid evidence to back that up. What you are suggesting seems to be: - There…"
Tuesday

Developer
Rob_Lefebvre replied to Mike Kelly's discussion Quad falls suddenly
"Interesting.  So which brands were you using, and what are you using now? The Vcc thing in particular is very odd, if it's supplying 5.2V but the board is actually measuring low 4's.  Has there been any circuit hacking going on?"
Tuesday

Developer
Rob_Lefebvre commented on Sean Skirvin's blog post Meet the T1000, 1+hr flight times w/ 1kg payload
"Euan: You are.  You and everybody else. ;)"
Tuesday

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…

Continue

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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